Encore Multi-port DSU/CSU User Guide Part 098-00903-01 Rev.
Copyright Copyright © 1997, Digital Link Corporation World copyright reserved. No part of this publication may be stored in a retrieval system, transmitted, or reproduced in any way, including but not limited to photocopy, photograph, magnetic, chemical, or other record, without the prior agreement and written permission of Digital Link Corporation.
its sole option, either repair or replace defective goods or work, and shall have no further obligation to buyer. Return of the defective items to Digital Link shall be at buyer's risk and expense.
ISO RegistrationCompliance Products Manufactured Under An ISO 9001 Certified Quality Management System To maintain EMC Class B (CE Label) compliance, shielded cables should be used with the unit. This product complies with ¥ CE MARK ¥ FCC Part 15 Class A ¥ U.L. 1950 ¥ VL1459 ¥ C.U.L.
Table of Contents G Copyright ii Product Limited Warranty ii Remedies and Limitations of Liability ii Disclaimer iii ISO RegistrationCompliance iv Audience xxiii Symbols xxiv Typographic Conventions xxv When Viewing in Adobe Acrobatª xxvi To follow a link: xxvi To retrace your viewing path: xxvi Examples xxvi Digital Link Technical Support xxvii Returning a DSU/CSU xxviii Send Us Your Comments xxviii Chapter 1, Introduction 1-1 Multi-port Encore DSU/CSU Features 1-3 Servi
Compliancy 1-5 About the Telnet Utility 1-5 Example of a Network Configuration 1-5 Chapter 2, Installation 2-1 Preparation 2-1 Required Location 2-2 Check the Equipment 2-2 Equipment Model Numbers 2-3 Preparing the Required Information 2-3 Installation vi 2-4 Flat Surface Installation 2-4 Rack Mount 2-4 Connecting to Power 2-6 Connecting the DL100 to AC Power 2-6 Connecting the VX Encore to AC and DC Power 2-8 Connecting the VX Encore to AC Power 2-8 Connecting the VX Encore
Chapter 3, ConÞguration 3-1 Required Information 3-1 Keep a Record 3-1 Check the Comm Port Settings 3-2 View and Modify the DSU/CSU Comm Port Settings 3-2 Switching Modes Connecting an ANSI Terminal Connecting a Terminal Through a Modem 3-2 3-3 3-4 Connecting DSU/CSUs in a Daisy Chain 3-5 Access Rights 3-6 Assigning User Passwords 3-6 Setting Password Protection for the User Interface 3-7 Logging On and Off the DSU/CSU 3-7 The Unit ID 3-7 Log On from a Terminal 3-8 Log On Through T
Allocating Timeslots 3-21 Three Allocation Methods 3-21 Switching from Contiguous to Alternate Allocating Contiguous Timeslots 3-23 Allocating Alternate Timeslots 3-25 Allocating Timeslots Manually 3-27 Configuring for SNMP 3-28 Configuring Alarms, Modems and Security 3-32 How Alarms Are Reported How Alarms Reports Are Displayed 3-33 3-34 Menu-7 Alarm I 3-35 Menu-8 Alarm II 3-37 External Alarm Configuration 3-37 Miscellaneous Management Configuration 3-40 Modem Initialization 3-42
Data DTE Status Parameters Monitoring Performance 4-8 4-9 Events in the Performance Reports 4-10 Carrier Register, Current Interval 4-11 Carrier Registers, Total over 24 Hours 4-12 Carrier Registers, 24 Hour Detail 4-13 User Registers, 24 Hour Detail 4-14 Displaying the Performance Report in D4 Mode 4-15 Displaying the Event Log 4-15 Event Log Parameters 4-16 Chapter 5, The Front Panel 5-1 What is Not Available on the Front Panel 5-2 The Interface 5-2 Using the Front Panel 5-3 Chan
Adding a Caution Flag 6-2 Testing with Menu-9 Diagnostics 6-2 Menu-9 Diagnostics Parameters Next Test (fraction) 6-6 The Self Test 6-7 The Loop DTE Test 6-7 The Loop NET Test 6-8 The Loop Payload Test 6-9 The DTE/NET Test 6-10 Running Multiple Payload Tests 6-10 The Loop Up Remote Test 6-11 The Pattern Tests 6-13 The QRW Pattern Test 6-13 The Send 1:7 Pattern Test 6-13 The Send 3:24 Pattern Test 6-13 The Send 1:1 Test 6-13 The Send All Ones Test 6-13 The Send All Zeroes Test
The DSU/CSU System does not Dial Out when an Alarm Occurs 6-17 There is no FDL Communication with the Remote/far End System 6-17 The ESF User Registers do not Clear from the Network Carrier 6-17 Current Tests Terminate without your Intervention 6-18 The System Cannot be put into Network Loopback from the Carrier 6-18 The System cannot be Put into Payload Loopback from the Network 6-18 The NET LED does not Illuminate 6-19 The NET LED is Constantly Red 6-19 The NET LED Remains Constant Amber/y
Data Interface A-1 DS1 Interface A-2 System Timing A-2 SNMP A-2 Front Panel A-3 Power Options A-3 Alarm Contacts A-4 Environmental A-4 Regulatory A-5 Diagnostics and Tests A-6 Reliability and Equipment Life A-7 Front Panel LEDs A-7 Front Panel Test Jacks A-9 Comm Port Parameters A-10 Equipment Grounding Conductor A-10 Multi-port DSU/CSU Model Number A-12 Factory Default Configuration A-13 Determining the Distance between the DSU/CSU and the T1 Line Demarcation Point A-15
Glossary Index Table of Contents Glossary-1 Index-1 xiii G
xiv Encore Multi-port DSU/CSU User GuideÑJuly, 1997 G
List of Figures G Figure 1-1 VX Encore 1-2 Figure 1-2 DL100 Encore 1-2 Figure 1-3 Digital Service Hub 1-3 Figure 1-4 Example of Wide Area Network 1-6 Figure 2-1 VX Encore Mounted on a 19" Rack 2-5 Figure 2-2 VX Encore Mounted on a 23" Rack 2-5 Figure 2-3 AC Power Receptacle on DL100 Encore and Digital Service Hubs 2-7 Figure 2-4 Plus and Minus Terminals on VX Encore Back Panel 2-9 Figure 2-5 Back Panel Ground Stud Figure 3-1 Daisy-chained Multi-port Encore DSU/CSUs 2-10 3-5 Figure 3-2 Me
xvi Figure 3-4 Menu-6 Timeslot ConÞguration in Default Mode 3-23 Figure 3-5 Menu-0 SNMP ConÞg. in ESF Mode 3-29 Figure 3-6 Menu-0 SNMP ConÞg.
Figure 4-7 Menu-3, User Registers, 24 Hour Detail Report in ESF Mode 4-14 Figure 4-8 Menu-3 Event Log 4-15 Figure 5-1 Front Panel Interface 5-2 Figure 5-2 The Front Panel Menu Tree, MONITOR 5-5 Figure 5-3 The Front Panel Menu Tree, TEST 5-6 Figure 5-4 The Front Panel Menu Tree, CONFIGURATION 5-8 Figure 5-5 The Front Panel Menu Tree, CONFIGURATION (Continued) 5-9 Figure 5-6 AUX CONFIG Submenu, DS1 Port 5-10 Figure 6-1 Menu-9 Diagnostics with Loop Payload Test Selected 6-4 Figure 6-2 Loop DT
xviii Encore Multi-port DSU/CSU User GuideÑJuly, 1997 G
List of Tables G Table 1-1 Data Ports Table 2-1 Connecting the DTE cable Table 3-1 Access Rights 1-1 2-11 3-6 Table 3-2 Encore Multi-port DSU/CSU Menu Parameters 3-10 Table 3-3 UNIT 3-14 Table 3-4 NET 3-15 Table 3-5 AUX 3-18 Table 3-6 Menu-5 Data Port Parameters 3-20 Table 3-7 Network Time Slot Map 3-25 Table 3-8 Network Time Slot Map 3-27 Table 3-9 Network Time Slot Map 3-28 Table 3-10 SNMP Parameters 3-30 Table 3-11 Community Strings 3-32 xix G
xx Table 3-12 Alarm Sources and Events 3-33 Table 3-13 Menu-7 Alarm I Parameters 3-35 Table 3-14 External Alarm Configuration Parameters 3-39 Table 3-15 Miscellaneous Management Configuration Parameters 3-41 Table 4-1 Unit Status 4-3 Table 4-2 Network Status 4-4 Table 4-3 AUX DTE Status 4-5 Table 4-4 DATA DTE Status 4-5 Table 4-5 DATA DTE Status 4-6 Table 5-1 Front Panel Keys 5-3 Table 6-1 Current Test 6-4 Table 6-2 Next Test (Fraction) 6-6 Table 6-3 Self Test Error Indicators 6-7
Table A-1 Network Interface A-1 Table A-2 Data Interface A-1 Table A-3 DS1 Interface A-2 Table A-4 Front Panel A-3 Table A-5 Power Options A-3 Table A-6 Alarm Contacts A-4 Table A-7 Environmental A-4 Table A-8 Mechanical A-4 Table A-9 Diagnostics A-6 Table A-10 Reliability and Equipment Life A-7 Table A-11 Front Panel LEDs A-8 Table A-12 Monitor Jacks.
xxii Table B-2 DA-15 Auxiliary DS1 Connector Pin Assignments B-1 Table B-3 DB-25 to V.
Preface G The Multi-port Encore DSU/CSU User Guide provides the information to install, test, operate and manage Digital Link VX Encoreª, DL100 Encoreª and DL1200/2400ª DSU/CSUs (DSU/CSU or unit in this guide). Audience This guide is intended for network managers and technicians experienced in installing LAN to WAN equipment. Users should be thoroughly familiar with the network topology within which the DSU/CSU operates.
Symbols Symbols alert you to instructions that could result in equipment damage, or injury to you. The symbols this guide uses are: NOTE: Important information relating to the previous paragraph. CAUTION: If you do not follow the instructions in the previous paragraph, you might damage the equipment or application. WARNING: If you do not follow the instructions in the previous paragraph, you might injure yourself.
Typographic Conventions Typographical conventions are used throughout this document. Their purpose is to help you distinguish between the different types of information and instructions contained in the document. We hope you Þnd it helpful. Table 0-1 Typeface or Symbol Meaning Example Courier Font AaBbCc123 The names of commands, Þles, and directories, as well as on-screen computer output. Edit your .login Þle. Use ls -a to list all Þles. machine_name% You have mail.
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Digital Link Technical Support If you have a problem, prepare the following information and contact Digital Link Technical Support: ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ DSU/CSU conÞguration? Software revision? Hardware revision? When was the DSU/CSU conÞguration last changed? How? What connects to the DSU/CSU (routers, test equipment, etc.
Returning a DSU/CSU In the event that you need to return a DSU/CSU for service or repair, please call the Customer Service Dept. at Digital Link, (408) 745-4200 and obtain an ERA (Equipment Return Authorization) number. Package the DSU/CSU carefully placing the ERA number on the address label and a note inside describing the problem and send it to the address below.
Introduction 1 1 Digital Link offers four Multi-port Encore DSU/CSUs which enable you to access highspeed public/private T1/FT1 and frame relay services. The DSU/CSUs convert V.35, EIA-530 and RS-449 compatible DTE data for T1/FT1 network transport. The four DSU/CSUs are the VX Encore, DL100 Encore and two Digital Service Hubs. The products shown in Table 1-1 differ only in the number of data ports they offer.
1 When referring to the four Multi-port DSU/CSUs, this guide uses DSU/CSU. When information applies to only one of the four, the DSU/CSU is identiÞed by name.
1 PORT 19 PORT 20 PORT 21 PORT 22 PORT 23 PORT 24 PORT 13 PORT 14 PORT 15 PORT 16 PORT 17 PORT 18 PORT 7 PORT 8 PORT 9 PORT 10 PORT 11 PORT 12 PORT 3 PORT 4 PORT 5 PORT 6 DL2400 DIGITAL SERVICE HUB PORT 1 Figure 1-3 PORT 2 Digital Service Hub Multi-port Encore DSU/CSU Features The four Multi-port Encore DSU/CSUs offer these features. Service ¥ T1/FT1 point-to-point connectivity. ¥ Access to packet-based services such as frame relay.
1 Data ports ¥ Software conÞguration for V.35, RS-449 or EIA-530 electrical interface with a DB-25 connector. ¥ A DTE or DCE interface. ¥ Bandwidth mapping into contiguous, alternate or manually selected DS0 slots. ¥ Selectable data rates Ñ from 56Kbps to 1.536Mbps. ¥ A smooth clock at all data rates. ¥ Timing optionsÑSCTE, SCT and inverted SCT clock. ¥ Standard DS1 drop and insert port with the DL100 Encore, DL1200 and DL2400; aux. port is optional on the VX Encore.
1 Compliancy Compliance with: FCC Part 68, AT&T TR62411, AT&T TR54016-1989, ANSI T1.4031989, FCC Part 15, UL 1459, UL 1950, DOC (IC), CUL (CSA) and AT&T TR54019 Fractional T1 About the Telnet Utility Telnet is a TCP/IP-based network application or Internet service that enables you to log on to another node on the network and use the nodeÕs interface as though you were directly connected to the node. The Telnet application uses TCP as the transport protocol.
1 camera V.35/RS449 PBX TV with camera DL100 Encore Router DL100 AUX V.35/RS449 V.35/RS449 Router FT1 V.35/RS449 VX Encore Comm Port router AUX FT1 V.35/RS449 WAN or Frame Relay FT1 PBX Router VX Encore V.35/RS449 SNMP Management System terminal server Tektronix PHASER II V.
Installation 2 2 This chapter describes the physical installation process. The installation is the same for each Multi-port Encore DSU/CSU. When information applies to one DSU/CSU only, the DSU/CSU is speciÞcally identiÞed. Preparation Before you can install the Multi-port Encore DSU/CSU, you need to: ¥ Unpack and inspect the DSU/CSU for damage that may have occurred during shipment. Wipe the exterior with a soft cloth, if needed.
2 Required Location Install the DSU/CSU in a Restricted Access Area in accordance with safety regulation in Articles 110-16, 110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70. An example of a suitable area us a dedicated equipment room or closet that is clean, wellventilated and free of environmental extremes. Allow two to three feet of clearance around the DSU/CSU to give you access during the installation.
2 ¥ AUX port interface cable The cable can have DA-15 male connectors on both ends or a DA-15 male connector on one end and an RJ-48C male connector on the PBX end. ¥ AC power cord and wall mount -48 VDC adaptor (VX Encore only). ¥ Tray cable The cable connects the DSU/CSU to DC power, and must be a UL recognized 14 AWG, 3 conductors, copper strand wire, electrical power and control tray cable, type TC: tray cable, 600 V 90 degree C. An Alpha Wire Company No. 45443 is an example of a proper DC power cable.
2 Installation The Multi-port Encore DSU/CSU installs on a ßat surface or mount in a 19" or 23" rack. Flat Surface Installation To install a DSU/CSU on a ßat surface: 1. Remove the ears attached to the DSU/CSU. 2. Remove the covering from the stick-on rubber feet and stick the feet to the bottom of the DSU/CSU. 3. Place the DSU/CSU on a ßat, stable surface. You can stack other units on top of the DSU/CSU. Rack Mount The DSU/CSU can mount on a 19Ó or 23Ó rack.
2 VX EXIT EFS 100 END TEST PERCENT ENTER SND SND RCV MON IN MON TEST NET T1 DSU/CSU PORT 2 PORT 2 TD RD RTS CTS DTR DATA TD RD RTS CTS DTR DATA TEST TEST Figure 2-1 AUX VX Encore Mounted on a 19" Rack VX EXIT EFS 100 PERCENT END TEST ENTER SND SND RCV MON IN MON TEST NET PORT 2 PORT 2 TD RD RTS CTS DTR DATA TD RD RTS CTS DTR DATA TEST Figure 2-2 Installation T1 DSU/CSU AUX TEST VX Encore Mounted on a 23" Rack 2-5
2 Connecting to Power Connecting the DL100 to AC Power The DL100 Encore DSU/CSU and the two Digital Service Hubs (DL1200 and DL2400) use AC power only. (To install the VX Encore to AC power using an adaptor go to Connecting the VX Encore to AC and DC Power on page 2-8.) The DSU/CSU should be within six feet of a grounded AC outlet that is controlled by a circuit breaker and capable of furnishing 120 VAC, 275mA at 60 Hz (for VX Encore), 120 VAC, 0.5A at 60 Hz (for DL100 Encore, DL1200 and DL2400).
2 AUX RCV AUX XMT PORT 2 PORT 1 COMM PORT EXT CLOCK ALARM IN RTN OUT DC POWER _ + DC power inputs are not operational Figure 2-3 Installation AC Power Receptacle on DL100 Encore and Digital Service Hubs 2-7
2 Connecting the VX Encore to AC and DC Power This section describes: ¥ AC power connection ¥ DC power connection Connecting the VX Encore to AC Power To connect the VX Encore to AC power, you need the -48VDC adaptor provided with the DSU/CSU. 1. Before you connect the VX Encore to the centralized DC power source, strip 2" of jacket material off the tray cable and 1/2Ó of insulation off each wire. 2. Connect the positive wire to the positive terminal and the negative wire to the negative terminal.
2 . AUX AUX RCV AUX XMT PORT 2 PORT 1 COMM PORT EXT CLOCK DC ALARM POWER _ + IN RTN OUT + terminal - terminal Figure 2-4 Ground Stud Plus and Minus Terminals on VX Encore Back Panel Connecting the VX Encore to DC Power You need a tray cable that is UL recognized 14 AWG, 3 conductors, copper strand wire, electrical power and control cable, type TC: tray cable, 600 V 90 degree C. An Alpha Wire Company No. 45443. is an example of a suitable cable.
2 6. Connect a third safety ground wire to the ground stud using a 1/4" wrench and a 5 Lb-ins fastening torque and to a good ground. 7. To minimize disturbance to the wires through casual contact, secure the tray cable near the rack frame using multiple cable ties. Use at least four cable ties, a minimum of 4 inches apart, tying the Þrst tie within 6" of the terminal block (a cable tie mount is provided). 8. Connect the VX Encore to the DC power source.
2 To connect the DSU/CSU to the DTE devices, you use a data port interface cable. The cable type depends on the DSU/CSUÕs interface (V.35 or RS-449) and its operating mode (DCE or DTE). Table 2-1 lists the cable and distance requirements. Table 2-1 Connecting the DTE cable DSC/CSU Cable In DCE mode Use a DTE cable. For most applications, the customer equipment operates as a DTE. Set the DSU/CSU operating mode as DCE. In DTE mode Use a DCE cable.
2 To connect the DSU/CSU to the DTE devices: 1. Using the appropriate DTE cable, connect the cable to the DB-25 female port on the DSU/CSU, labeled PORT 1, and to the V.35 or RS-449 port on the Þrst DTE device. 2. Using the appropriate DTE cable, connect the cable to the DB-25 female port on the DSU/CSU, labeled PORT 2, and to the V.35 or RS-449 port on the second DTE device. Use this method to connect the DSU/CSU to the other DTE devices.
2 The T1 cableÕs send and receive pairs are shielded separately to minimize cross-talk. Additional information on this cable is outlined in the AT&T Technical Reference Publication PUB TR62411 on ÒHigh Capacity Digital Service Channel Interface SpeciÞcation.Ó If you are using RJ-48C cabling, a DA-15 to RJ-48C adaptor is available for use with standard network interface cables to connect to all types of customer network interfaces.
2 2-14 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
ConÞguration 3 3 To conÞgure a Multi-port Encore DSU/CSU, use: ¥ The terminal interface ¥ The front panel interface The front panel interface is convenient when a terminal is not readily available. . Required Information Before you begin the initial conÞguration of a Multi-port DSU/CSU, gather: ¥ The DSU/CSU IP address and IP subnet mask Ñ permit SNMP network management capability and establish a Telnet connection from a remote terminal. ¥ SNMP requires one to three NMS IP addresses.
3 Check the Comm Port Settings Before you connect the terminal, make sure the DSU/CSU Comm Port settings match the settings on the terminal, terminal server, or modem. The default DSU/CSU Comm Port settings are: ¥ ¥ ¥ ¥ Baud rate Ñ 9600 Parity bitÑ none Word length Ñ 8 Stop bits Ñ2 View and Modify the DSU/CSU Comm Port Settings You can view and modify the Comm Port settings on the DSU/CSU only from the front panel interface. For instructions, refer to ConÞguration Submenus on page 5-8.
3 Connecting an ANSI Terminal You can connect an ANSI-based VT100 compatible terminal to the Comm Port either directly, through a Digital Link Management Access Processor (MAP) in ASCII mode, terminal server, or a modem. The DSU/CSU Comm Port (DC-9 connector), on the back panel, is compatible with ANSI-based VT100-compatible terminals or terminal emulation programs supporting this format. If the Comm Port baud rate is 9600, the distance between the terminal and the DSU/CSU cannot exceed 50 feet.
3 Connecting a Terminal Through a Modem Use a null modem cable to connect a terminal through a modem. NOTE: Digital Link can provide 9-pin to 25-pin adaptors, as well as a null-modem adaptor if required. With a Comm Port baud rate of 9600, the distance between the terminal and the modem cannot exceed 50 feet. It is recommended, though not required, that you set Connection to Modem in Menu-8 Alarm II. To connect a modem to the DSU/CSU Comm Port: 1. Make sure you have a crossover (null) modem connection. 2.
3 Connecting DSU/CSUs in a Daisy Chain You can connect up to 60 Multi-port Encore DSU/CSUs in a single RS-232 multi-drop (daisy-chain) for the purpose of monitoring and managing the DSU/CSUs from a single centralized workstation. Use a ribbon-type cable with DC-9 connectors (available from Digital Link). NOTE: CTS (pin 8) must be connected between the DSU/CSUs, and not connected to the terminal. Refer to Appendix B, Connector Pin Assignments. To daisy-chain multiple systems together: 1.
3 Access Rights The DSU/CSU supports superuser or normal user access rights. The superuser has the priority (Table 3-1). Table 3-1 Access Rights Superuser Nornal User Log off a user already logged on the DSU/CSU Be logged off by a superuser Change both passwords Log on only when no one is logged on Clear both passwords Assigning User Passwords It is important that you specify unique superuser and normal user passwords.
3 Setting Password Protection for the User Interface When you log on to the DSU/CSU for the Þrst time, set the superuser and the user password parameters (case-sensitive) in Miscellaneous Management ConÞguration on page 3-40. Default value is an empty text string. No password is required to log on for the Þrst time. If you do not set a password for either parameter, any user can access the DSU/CSU. You can set both password parameters or only the superuser password.
3 Log On from a Terminal The superuser always has access to the DSU/CSU, and disconnects a user that is currently logged on to that DSU/CSU. To log on from a terminal (when no other user is logged on): 1. Press Ctrl-x, type the unit ID, and press Return. If the DSU/CSU is password protected and no other user is logged on, you are prompted with a message similar to: Current Unit ID is MAUI. Now you need a password to log in: 2. Type in the password, and press Return. Menu-1 Main Status appears.
3 Log On in Other Conditions The DSU/CSU responds differently depending on who (user or superuser) is logged on. NOTE: After the Þfth unsuccessful attempt to log on, the .DSU/CSU closes the connection. Superuser The superuser has the rights to access the DSU/CSU at anytime. the If a user is logged on through Telnet and the superuser logs on, the DSU/CSU responds: The Terminal User Interface is already in use.
3 Do not try to log on from a Telnet session when the DSU/CSU is in dial-up mode. Use a terminal or a terminal emulation program instead to log on directly to the DSU/CSU. NOTE: Telnet sessions to multiple DSU/CSUs on a multi-drop line will result in intermittent delays to each Telnet session. Using the Terminal Interface to ConÞgure a DSU/CSU To fully conÞgure a Multi-port Encore DSU/CSU, set the parameters in the speciÞed menus (refer to Table 3-2).
3 ConÞguring the Menu-4 Main Parameters Use Menu-4 Main ConÞguration to set the unit ID, date, time and T1 network parameters. If you are using the optional port on the VX Encore, you can also set the AUX (DS1) port parameters. Editing a Parameter You can edit the parameters in a menu that appear in bold face. The other parameters are read-only. To edit any parameter: ¥ Using an Arrow key, move to the value and press Return to activate edit mode Ñ the value highlights and blinks.
3 Unit ID Figure 3-2 Time Date Menu-4 Main ConÞguration in ESF NOTE: DACS or Non DACS appears in NET Interface if the remote DSU/CSU is running an older Þrmware version. Setting the Unit ID, Date and Time To set the unit ID, date and time in Menu-4 Main ConÞguration: 1. Press 4 to open Menu-4 Main ConÞguration. 2.
3 3. Press Return to select the Þeld. The Þeld blinks (this is edit mode) and a prompt appears at the bottom of the screen: Please Enter an ID [6 characters maximum]: 4. Type the unit ID and press Return. Use up to six alphanumeric characters; do not begin with a number. Do not enter a blank ID. This causes the DSU/CSU to be always logged on. Each DSU/CSU is shipped with a unique default ID, a variant of its serial number (example: FE0086). 5.
3 Setting the Auxiliary Port and Network Parameters The optional AUX (DS1) port is designed for connections to DS0 channelized customer premise devices such as channel banks and PBXs. To enable the DSU/CSU to convert the framing and line coding between the customer premise devices and the network, you select the framing and line coding on the AUX port independently from the network port.
3 Table 3-4 NET Parameter Setting Description Framing ESF or D4 DefaultÑESF. Select the Network T1 framing format. Line Code B8ZS or AMI DefaultÑB8ZS. Select the Network T1 line code format. LBO 0dB, -7.5dB, or -15dB DefaultÑ0dB. Select the Line Build Out value used for tuning the attenuation between the DSU/CSU and the last repeater on the T1 circuit. For instructions, see Factory Default ConÞguration on page A-13. Interface Read-only DefaultÑDACS. In the new 3.
3 Table 3-4 Parameter NET (Continued) Setting Non DACS Main/Alt Syn Description Non DACS automatically switches to ALTERNATE timing and, if this is not available, to INTERNAL timing. Select Non DACS if the DSU/CSU looses NETWORK timing. INT, EXT[n], NET, and DATA [n] (DTE) NET DefaultÑNET/INT. Select the main clock source and then the alternate clock source for the T1 network transmitter. (Each source has the same options.) Type y to conÞrm each action.
3 Table 3-4 NET (Continued) Parameter Setting Description ANSI FDL Protocol (ESF only) Enabled or Disabled DefaultÑEnabled. EnabledÑEnables the ANSI T1.403 FDL protocol. DisabledÑDisables the protocol. FDL (ESF only) Block or Through DefaultÑBlock. Through Ñ Enables FDL transmission (in both directions) only between the network and the CSU or AUX port. During a transmission to the network port, the FDL link between the AUX or CSU port is broken. BlockÑDisables the above function.
3 source is overridden and the alternate source (if available) or INTERNAL is used. When neither the main nor the alternate clock sources is available, INT (INTERNAL) is used. Table 3-5 3-18 AUX Parameter Setting Description Framing ESF or D4 DefaultÑESF. Select the DS1 DTE framing format for the auxiliary port. Line Code B8ZS or AMI DefaultÑB8ZS. Select the DS1 T1 line code format for the auxiliary port. Bit 7 StufÞng Enabled or Disabled DefaultÑEnabled.
3 ConÞguring the Data Ports Use Menu-5 Data Port ConÞguration to conÞgure the DSU/CSU data ports (DATA01, DATA02, DATA03, etc.). In the example in Figure 3-3 the local DSU/CSU is a DL1200 with 12 ports and the remote DSU/CSU is a VX Encore. Figure 3-3 Menu-5 Data Port ConÞguration Table 3-6 describes the parameters in Figure 3-3.
3 Table 3-6 3-20 Menu-5 Data Port Parameters Parameter Setting Description Code NORMAL, HDLC, FORCED, DEFERRED DefaultÑNORMAL. NORMAL ÑThis code makes the DTE device responsible for proper ones density (or the T1 line is conÞgured for B8ZS). Additional ones are not inserted. HDLCÑ(High Level Data Link Control) The DSU/CSU receives HDLC data from the DTE device and inverts it (0 to 1, 1 to 0) to ensure proper ones density.
3 Table 3-6 Menu-5 Data Port Parameters (Continued) Parameter Setting Description Format V.35 or RS-449 Default ÑV.35. Select the V.35 or RS-449 format. You can select X.21, EIA530 and other formats by using different cables. For EIA 530 or X.21 applications, use an EIA 530 or X.21 DTE cable and set to RS-449. Clock +SCT, -SCT, or SCTE DefaultÑ +SCT. For DTE timing, select SCT, a unipolar clock generated by the DCE. You can invert the clock (-SCT) or not (+SCT).
3 ¥ Alternate ÑYou allocate timeslots in an alternate order, with slots always odd numbered. Every even numbered slot is unused and Þlled with an All Ones pattern to maintain pulse density over T1 lines without a clear channel. Use this method to meet AT&T TR54019A requirements. ¥ Manual ÑThe manual method allows you to allocate timeslots in an arbitrary random order which decreases the likelihood of unauthorized access via in-line taps.
3 When you switch from Alternate to Contiguous order, all allocated slots in a range change to a contiguous order (Figure 3-4). Figure 3-4 Menu-6 Timeslot ConÞguration in Default Mode Allocating Contiguous Timeslots To allocate timeslots in a contiguous order, follow the method in the example below. Example: You want to allocate: data port 1 Ñslots 1 through 8, data port 2 Ñslots 9 through 20, AUX port Ñslots 21 through 24. You are starting with the default statusÑThe allocation mode is Contiguous.
3 ¥ Enter 2 for port 2 and press Return when prompted by the system. DATA02 IDLE -IDLE appears in Allocate by Port. 2. Allocate the start and end timeslots for port 2: ¥ Enter 9 when the system prompts for the start timeslot and press Return. ¥ Enter 20 when the system prompts for the end timeslot and press Return.
3 Network Time Slot Map shows slots 1 through 8 allocated to port 1, slots 10 through 20 to port 2 and slots 21 through 24 to AUX. Table 3-7 1 Network Time Slot Map 2 Local D01 13 D01 14 Local D02 D02 3 4 5 6 7 8 9 10 11 D01 D01 D01 D01 D01 D01 D02 D02 D02 15 16 20 21 22 23 24 AUX AUX AUX AUX D02 D02 17 D02 18 D02 19 D02 D02 12 D02 Allocating Alternate Timeslots To allocate alternate timeslots to one or more ports, follow the method shows in the example below.
3 3. To allocate the start and end timeslots for port 1: a. Enter 11 and press Return when the system prompts for the start timeslot. b. Enter 17 and press Return when the system prompts for the end timeslot. c. Press y to conÞrm when the system asks: Do you really want to change the configuration? d. Press y again to conÞrm when the system asks: Some timeslots are already assigned to other ports. Proceed. (Y or N): DATA02 TS11-TS17 256 Kb/s appears in Allocate by Port. 4. Select the AUX port: a.
3 AUX TS19-TS23 192 Kb/s appears in Allocate by Port. Network Time Slot Map shows all even numbered slots blank or idle and all odd numbered slot allocated. Table 3-8 1 Network Time Slot Map 2 Local D01 13 --14 Local D02 --- 3 4 5 6 7 8 9 10 11 D01 --- D01 --- D01 --- D01 --- D02 15 16 17 18 19 20 21 22 23 D02 --- D02 --- AUX --- AUX --- AUX 12 --24 --- Allocating Timeslots Manually To allocate timeslots manually, follow the method in the example below.
3 a. Enter 1 for timeslot 1 and press Return when the system prompts for the start timeslot. b. Press 1 and Return when the system prompts for the end timeslot. c. Press y to conÞrm the change. DATA01 TS01-TS01 appears. Timeslot 1 in Menu-6 is allocated to port 1. Repeat this procedure to allocate each timeslot individually to the assigned ports.
3 Figure 3-5 Menu-0 SNMP ConÞg. in ESF Mode Table 3-10 and Table 3-11 describes the parameters in Figure 3-5 and Figure 3-6.
3 Figure 3-6 Menu-0 SNMP ConÞg. in D4 Mode Table 3-10 SNMP Parameters 3-30 Parameter Setting Description Unit SNMP Enabled or Disabled DefaultÑDisabled. EnabledÑEnables use of your SNMP management application. IP address nnn.nnn.nnn.nnn DefaultÑ 0.0.0.0. nnn = 0 through 255. Enter the DSU/CSU IP address. Example Ñ192.84.33.6 IP Mask nnn.nnn.nnn.nnn DefaultÑ0.0.0.0. nnn = 0 through 255. Enter the DSU/CSU IP mask. Example Ñ255.255.255.
3 Table 3-10 SNMP Parameters (Continued) Parameter Setting Description Forward Over FDL Enabled or Disabled DefaultÑ Disabled. EnabledÑEnables the SNMP packets destined for the remote DSU/CSU to be automatically forwarded from the DSU/CSU over FDL (in ESF only). TRAP 1st NMS IP Address nnn.nnn.nnn.nnn DefaultÑ0.0.0.0. nnn = 0 through 255. Enter the IP address of the Þrst Network Management Server. The DSU/CSU sends trap messages to this server. TRAP 2nd NMS IP Address nnn.nnn.nnn.nnn DefaultÑ0.0.
3 Table 3-11 Community Strings Parameter Setting Description Get Text string Default Ñ public. Enter an alphanumeric text string (maximumÑ32 characters) which the DSU/CSU SNMP agent will use to check GET requests from the SNMP management station for the DSU/CSU SNMP conÞguration. Set Text string Default Ñ public.
3 Table 3-12 Alarm Sources and Events Alarm Source Alarm Event T1 Network Port Loss of Network Signal, Loss of Network Frame, Receive Blue Alarm from network (AIS), Receive Yellow Alarm from network Data Port Loss of Signal AUX Port Loss of Signal Exceeded threshold Three threshold settings in Menu-7 Alarm IÑBPV Threshold Alarm, CRC Threshold Alarm OOF Threshold Alarm This section describes how to set Menu-7 Alarms I and Menu-8 Alarms II.
3 How Alarms Reports Are Displayed The DSU/CSU displays alarms on a terminal at the bottom of the screen when a terminal is connected to the DSU/CSU Comm Port and you are logged on. When you are not logged on, the alarm appears as a single line showing the unit ID, local or remote alarm, type of alarm, start or end of alarm and the time stamp. Example Ñ a carrier loss condition on a Data Port appears at the bottom of the screen as: --Local ID:Oahu Data1 Carrier Loss Start: 07:17:37 Jan.
3 Menu-7 Alarm I Figure 3-7 shows Menu-7 and Figure 3-8 on page 3-37 shows Menu-8 alarms with descriptions beneath each section. Figure 3-7 Menu-7 Alarm I The example in Figure 3-7 shows the remote DSU/CSU as a VX Encore. Table 3-13 describes the parameters in Figure 3-7. Table 3-13 Menu-7 Alarm I Parameters Parameter Setting Description NET Carrier Loss Alarm Enabled or Disabled DefaultÑEnabled. NET Sync Loss Alarm Enabled or Disabled DefaultÑEnabled.
3 Table 3-13 Menu-7 Alarm I Parameters (Continued) 3-36 Parameter Setting Description NET AIS Received Alarm Enabled or Disabled DefaultÑEnabled. NET Yellow Received Alarm Enabled or Disabled DefaultÑEnabled. AUX Carrier Loss Alarm Enabled or Disabled (NA) AUX Sync Loss Alarm Enabled or Disabled (NA) AUX AIS Received Alarm Enabled or Disabled (NA) AUX Yellow Received Alarm Enabled or Disabled (NA) DATA DTE Signal Loss Alarm Enabled or Disabled DefaultÑEnabled.
3 Menu-8 Alarm II From this menu, use an arrow key to select a submenu, and the Return key to enter that submenu. Figure 3-8 Menu-8 Alarm II External Alarm ConÞguration Use the External Alarm ConÞguration to deÞne external alarms (Figure 3-9).
3 Figure 3-9 Menu-8 - External Alarm ConÞguration Table 3-14 describes the parameters shown in Figure 3-9.
3 Table 3-14 External Alarm ConÞguration Parameters Parameter Setting Description External Alarm Input Indication Enabled or Disabled DefaultÑDisabled. EnabledÑEnables the SoloT1 to receive alarms from an external source (such as a door opening or a burglar alarm). You must have a device attached to the DB-9 connector (labeled ALARM IN/OUT) on the back panel. You can have more than one connection on the DB-9 connector.
3 Miscellaneous Management ConÞguration Use Miscellaneous Management ConÞguration to deÞne external communications parameters. Figure 3-10 Menu-8 - Miscellaneous Management ConÞguration Table 3-15 describes these parameters.
3 Table 3-15 Miscellaneous Management ConÞguration Parameters Parameter Setting Description Connection FDL, Modem, Direct DefaultÑDirect. In EFS mode, set to FDL (Facility Data LinkÑa four Kbit/s data channel provided by 12 of the 24 ESF framing bits, used by the carrier to request reports, clear error counters and activate loop backs) to enable a connection with the remote SoloT1. Set to Modem when using a modem connection. Timeout When Logged On 1 Min, 15 Min. 60 Min., Unlimited DefaultÑUnlimited.
3 Table 3-15 Miscellaneous Management ConÞguration Parameters (Continued) Parameter Setting Description COMM DCD Enabled, Disabled DefaultÑDisabled. Enabled ÑThe Ensemble Encore uses the modemÕs Data Carrier Detect (DCD) signal to provide more robust modem operation. Disabled Ñ Use Disabled if your null modem does not pass the Data Carrier Detect signal. COMM XON/XOFF Disabled, XOFF until ANY, XOFF until XON Default ÑXOFF until XON.
3 Solo T1 assumes that the modem always sends response; it is suggested that the modem not be programmed to override the response. Figure 3-11 Menu-8 Modem Initialization Strings If the modem reset command is used, it is recommended to program everything up to the reset command as the Þrst modem initialization string. Program the rest of the commands as the second modem initialization string.
3 3-44 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
Monitoring and Management 4 4 The Multi-port Encore DSU/CSU collects and displays performance data (compliant with the AT&T TR54016 registers set) as well as additional data useful for network troubleshooting. You can monitor and manage the DSU/CSU from a terminal, remote terminal Telnet connection, SNMP management station, or DLMS. The DSU/CSU monitors the T1 line continuously and displays all collected data on the terminal screen.
4 Monitoring Status Monitor the status of the Multi-port Encore DSU/CSU from Menu-1 Main Status and the status of its ports from Menu-2 Data DTE Status Menu-1 Main Status The remote DSU/CSU in this example is a Solo Encore.
4 To clear the counters: 1. Press c. 2. Press y to conÞrm after the system prompt (press any other key to take no action.): Do you really want to clear the error counters (Y/N)? Any status related to the counters may take up to a minute to clear. Error Free Seconds goes to 100%, values below CRC Errors are set to 0. Menu-1 Main Status Parameters All parameters in Menu-1 are read-only. Unit Status Unit Status shows if the DSU/CSU is operating normally of if any special conditions exits.
4 Table 4-1 Unit Status (Continued) Condition Description Send All 0Õs (full, AUX, DATAn) Unit is sending all zeros signal. LP DN Remote (full, AUX, DATAn) Unit is sending loopdown code to remote unit for 15 seconds. No Clock Clock source has failed. Lamp Test Unit is undergoing Lamp Test. Smart Jack Reset Unit is sending Smart Jack Reset code. Smart Jack Set Unit is sending Smart Jack Set code. Send Keep Alive Unit is sending All 1Õs Keep Alive signal.
4 AUX DTE Status AUX DTE Status shows any abnormal conditions present on the received DS1 DTE signal. If the optional AUX port is not supported, this menu line does not appear. Table 4-3 AUX DTE Status Condition Description Normal No abnormal conditions exist Loss of Signal DS1 DTE signal is missing. Loss of Frame DS1 DTE frame is missing. DATA DTE Status DATA DTE Status shows any abnormal conditions present on the received DATA DTE signal on a DTE port, DATA1 DTE, DATA2 DTE, DATA 3 DTE, etc.
4 Table 4-5 DATA DTE Status Parameter Setting Description Alarm Input Status Normal or 20character userdeÞned description DefaultÑNormal. NormalÑSelect Normal Error Free Seconds 0 to 100% Gives the percentage of seconds that are error free. CRC Errors (Cyclic Redundancy Check) ESF Mode An error checking scheme used to check the received data. The CRC bits within the framing are calculated using the contents of the frame.
4 Table 4-5 Parameter DATA DTE Status (Continued) Setting Description Errored Seconds in Interval Gives the number of errored seconds detected in the receive T1 network signal since the beginning of the current 15 minute interval. An errored second in ESF mode is one or more CRC-6 or OOF events in a second. In D4 mode it is one or more OOF or BPV events in a second. This count clears at the end of event 15-minute interval or by pressing C.
4 Figure 4-2 below shows an example of Menu-2 Data DTE Status. The local DSU/CSU is a VX Encore and the remote DSU/CSU is either a Solo Encore or Ensemble Encore SoloT1. Figure 4-2 Menu-2 Data DTE Status Data DTE Status Parameters Data Port # Ñ Local Test, Signal Loss, Normal Indicates the port status. If the local or remote DSU/CSU does not have a port in this position the Þeld is blank.
4 Monitoring Performance Each Multi-port Encore DSU/CSU collects and displays performance data (compliant with the AT&T TR54016 registers set) as well as additional parameters to help you in network troubleshooting. To monitor the DSU/CSU, use Menu-3 Performance Reports (Figure 4-3). Figure 4-3 Menu-3 Performance Reports in ESF Mode To select a report, use the Arrow keys to move to the report and press Return. The Þrst three reports display the carrier registers according to AT&T TR54016.
4 The fourth report displays the user registers. You can clear these if necessary. NOTE: The maximum error count displayed in the performance reports is 65,535. The actual value may be higher. Events in the Performance Reports The events in the Menu-3 Performance Reports are: ¥ Errored Seconds (ES) In ESF framing, a second with one or more ESF frame errors or CRC-6 errors. ¥ Unavailable Seconds (US) In ESF mode, the number of seconds elapsed after 10 consecutive SES events are received.
4 Carrier Register, Current Interval The DSU/CSU displays performance data for the most current 15-minute interval (Figure 4-4).
4 Carrier Registers, Total over 24 Hours Carrier Registers, total over 24 hours displays performance data for the last 24 hour period. The data is organized and displayed in 96 15-minute intervals. Included are a complete complement of AT&T TR54016 registers and ES, US, SES, and LOFC counts, as shown in Figure 4-5.
4 Carrier Registers, 24 Hour Detail Performance data for the last 24 hours is displayed in the Carrier Registers, 24 hour detail menu as shown in the example in Figure 4-6. Figure 4-6 Menu-3, Carrier Registers, 24 Hour Detail in ESF Mode The local DSU/CSU is a VX Encore and the remote DSU/CSU could be: ¥ ¥ ¥ ¥ ¥ ¥ Solo Encore VX Encore DL100 Encore DL1200 DL2400 An Ensemble Encore SoloT1.
4 User Registers, 24 Hour Detail Performance data in the user registers for the last 24 hours is displayed in the User Registers, 24 hour detail menu as shown in the example in Figure 4-7 below. Figure 4-7 Menu-3, User Registers, 24 Hour Detail Report in ESF Mode The local DSU/CSU is a DL1200 and the remote one of the following: a Solo Encore, VX Encore, DL100 Encore, DL1200, DL2400, or an Ensemble Encore SoloT1. Only the User Registers performance report can be cleared.
4 Displaying the Performance Report in D4 Mode Two performance reports are available in D4 mode: ¥ User Registers with 24 hour detail ¥ Event Log In Figure 4-9, the local DSU/CSU is a VX Encore and the remote is one of the following: a Solo Encore, VX Encore, DL100 Encore, DL1200, DL2400, or an Ensemble Encore SoloT1. Displaying the Event Log The Event Log display is shown in the Figure 4-8 example below.
4 Event Log Parameters Log - Local or Remote (Default - Local) Select for either Local or Remote event log. Module - displays either Unit, DTE (fraction), Network, AUX, System or All (Default All) The Þeld allows the display of either of the above status changes.
4 Event - This Þeld allows a particular type of event to be displayed (Default - 0, All). Enter an event index or use the cursor up/down keys to scroll through all the event options. While selecting the event, the event description text changes with the index. The event description text is displayed under the Description column in the event log menu. If the Event Þeld is left blank, the Event Þlter parameter is disabled. NOTE: Only selected Module and Events are displayed.
4 4-18 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
The Front Panel 5 5 This chapter describes the front panel interface of the DL100 Encore, DL1200, DL2400 and VX Encore.
5 What is Not Available on the Front Panel The front panel does not provide for setting: ¥ Alarm conditions and thresholds ¥ Superuser and Normal User passwords ¥ Modem connection and telephone numbers You must use the terminal interface to set these parameters. The Interface The front panel interface consists of a 16 character ßuorescent display and four keys. The interface displays one line of information at a time. You use the four keys to interact with the front panel interface.
5 The front panel interface can be disabled only from the terminal interface, using Protect Mode in Menu-4, Main ConÞguration. Using the Front Panel The top of the menu tree is ÒEFS 100 PERCENT.Ó If you press the ENTER key, you enter the menu tree. Use the up or down button to select move through the menus (ConÞguration, Test, or Monitor). (Refer to Figure 5-2 on page 5-5.) Table 5-1 shows the key functions.
5 Changing Information Most of the menus are toggles: pressing either the up or down arrow key changes the parameter from Yes to No, or Disabled to Enabled, or some other setting according to that parameter features. (Refer to Chapter 3 for descriptions of individual parameters.) In the CONFIGURATION menu, you can modify the information. For example, to change the UNIT ID (at the beginning, EFS 100 PERCENT): 1. Press ENTER. The menu you see is CONFIGURATION. 2. Press ENTER. The menu you see is UNIT CONFIG.
5 Monitor Submenus Figure 5-2 shows the MONITOR submenu and related submenus. For more information on the parameters, refer to Chapter 4, Monitoring and Management.
5 Test Submenus Figure 5-3 shows the TEST submenu and related submenus. For more information on the parameters, refer to Chapter 6, Diagnostics and Troubleshooting. Test Submenu Choices TEST A test is running when Test LED is red. SELF TEST (OK) LOOP DTE 1 , 2... LOOP PLD , , LOOP NET -DTE, +DTE (see The Loop NET Test on page 6-8.) LOOP PAYLOAD LOOP PLD , , , ...
5 Running a TEST PATTERN Also refer to Running the Pattern Test on page 6-25. To run TEST PATTERN: 1. Select TEST PATTERN and press ENTER to access the patterns submenu. 2. Press ENTER to open the TEST PTRN submenu. 3. Select the pattern (use the up or down keys). 4. Press ENTER to start the test. 5. Press ENTER again at the system prompt to conÞrm this test.
5 ConÞguration Submenus Figure 5-4, and Figure 5-5 show the CONFIGURATION submenus and related submenus. For more information on the parameters, refer to Chapter 6, Diagnostics and Troubleshooting CONFIGURATION UNIT CONFIG NET CONFIG UNIT ID NET FRAMING ESF DATE, TIME NET CODE B8ZS COMM PORT CNF DACS MODE YES TEST LENGTH _ _ _ NET TIMING HW REV D NET FDL SW REV 3.
5 CONFIGURATION TIMESLOT CONFIG SNMP CONFIG TS CONF CONTIG SNMP ENABLE NO IP 0.0.0.0 TS CONF MANUAL MSK, 0.0.0.0 TS CONF ALT 1ST NMS, 0.0.0.0 2ND NMS, 0.0.0.0 3RD NMS, 0.0.0.
5 The AUX CONFIG Menu Only when the optional auxiliary DS1 port is in use does t he AUX CONFIG menu appear on the front panel interface (refer to Figure 5-6). AUX CONFIG AUX FRAMING ESF AUX CODE AMI AUX EQUL 133 AUX FORCED AUX ALRM Figure 5-6 AUX CONFIG Submenu, DS1 Port Refer to Setting the Auxiliary Port and Network Parameters on page 3-14 for a description of the auxiliary port parameters.
5 ¥ One to three NMS IP addresses. For enabling SNMP network management capability ¥ Framing and line code requirements. As speciÞed in the work order from your service provider Keep a Record Keep a written record of each DSU/CSU conÞguration. Use the ConÞguration Worksheet provided in Appendix C, ConÞguration Worksheet.
5 5-12 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
Diagnostics and Troubleshooting 6 6 To verify your connections and T1 line, run diagnostics from Menu-9 Diagnostics: ¥ Self test ¥ Loop DTE test ¥ Loop NET test ¥ Loop Payload test ¥ Loop Up Remote test ¥ Various Pattern tests ¥ Loop Down Remote test ¥ NET/DTE LPBK Test ¥ Lamp test ¥ DTE/NET Loopback Test You can also run these tests from the front panel. Refer to Chapter 5, The Front Panel. NOTE: You do not need to inform the telephone company that you are running the tests.
6 Adding a Caution Flag You can add a caution ßag to the actions that may disrupt trafÞc or lose contact with the remote DSU/CSU.
6 3. To start the test, press s , then y to conÞrm (or press any other key to cancel). The test results are displayed in the upper half of the screen. 4. To end the test, press e, then y to conÞrm (or any other key to leave the test running). 5. To clear the pattern error counter, press c , then y to conÞrm (or any other key to cancel).
6 Figure 6-1 Menu-9 Diagnostics with Loop Payload Test Selected Menu-9 Diagnostics Parameters The parameters and options in the upper test status section of Menu-9 Diagnostics are: Table 6-1 Current Test Idle Self Test DTE Loopback (fraction) LP DN Remote fraction) NET Loopback (FULL) LP UP Remote (fraction) PLD Loopback (fraction) Lamp Test DTE/NET Loopback 6-4 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
6 Table 6-1 Current Test Idle Self Test Send All 1s (fraction) Send All 0s (fraction) Smart Jack Set Smart Jack Reset Send 1:1 (fraction) Send 1:2 (fraction) Send 1:4 (fraction) Send 1:7 (fraction) Send 3:24 (fraction) Send User 1 (fraction) Send User 2(fraction) Send QRW (fraction) ¥ Pattern Test Status Idle, Searching, Locked, Relocked Locked Seconds is displayed if the current pattern test is locked.
6 ¥ Last Self Test Result Self Test Passed Error nn (1 to 5) Next Test (fraction) Table 6-2 Next Test (Fraction) Self Test 1:1 Pattern QRW Pattern Loop DTE 1:2 Pattern USER 1 Pattern Loop NET 1:4 Pattern USER 2 Pattern DTE/NET loopback 1:7 Pattern Smart Jack Set Loop Payload 3:24 Pattern Smart Jack Reset Loop Up Remote All 0 Pattern Loop Down Remote All 1 Pattern Lamp Test ¥ Next Test Length 15 min, 1 min, 60 min, Unlimited With the Self Test, Loop Up Remote and Loop Down Remote, this
6 The Self Test The Self Test checks the DSU/CSU electronic components and performs a signal path check of transmit and receive directions utilizing a simulated 4000 foot T1 line. The possible messages are RUNNINGSELF TEST, SELF TEST PASSED or ERROR .
6 NOTE: You do not need to inform the carrier company before you run this test. However, if the test results indicate a phone company problem, you should inform the company, or require the DSU/CSU to be removed from service.
6 It loops the data received from the T1 network back to the network. The data is regenerated before it is looped back, however, the DSU/CSU does not perform additional processing of the data. This minimizes the impact of the DSU/CSU during the test so that network problems can be isolated.
6 The individual channel Loop Payload loops a selected ÒfractionÓ of the T1 signal toward the network. In this mode, the selected data is corrected for BPV, CRC and framing errors, and the FDL is regenerated before the data is looped back to the network. Receive and transmit clocks and data are suppressed toward the V.35 port on the DTE channels. Payload service to ports not in loopback is not affected. The DTE/NET Test The Loop DTE/NET test combines the Loop DTE on full bandwidth, and the Loop NET tests.
6 (This feature in not available on the VX Encore.) DTE DTE Local multi-port DSU/CSU CSU DSU Data Ports DTE Network Interface S DTE Remote DSU/CSU Network Interface Data Port DSU CSU AUX Port DTE DTE PBX Figure 6-4 Loop Payload Test The Loop Up Remote Test The Loop Up Remote test puts the remote DSU/CSU into Network Loopback using the industry standard set codes.
6 Use the Loop Down Remote test to terminate the remote loopback. You can run the Loop Up Remote and Loop Down Remote tests from the front panel. Refer to Chapter 5, The Front Panel. NOTE: The full bandwidth loop up code puts the remote DSU/CSU in a full bandwidth network loopback. The fractional loop up code puts the DSU/CSU in a fractional (per individual port) payload loopback.
6 The Pattern Tests The QRW Pattern Test QRW is a pseudo random signal which may catch problems not exposed by other test patterns. The DSU/CSU transmits a QRW pattern to the T1 network, the remote system loops it back to the DSU/CSU which monitors the signal for QRW bit errors. You can also use the QRW code to isolate a T1 network problem to a speciÞc transmission direction.
6 The Send All Zeroes Test This pattern is used to check the correct operation of the B8ZS (T1) line coding. This code is meant to allow a pattern with many 0 bits to go through the line transparently. The Send 1:4 (or alternate) Test The 1:4 code is the standard loop up remote code. It is typically used when the loop up remote test fails to put the remote system into loopback.
6 The User 1 Pattern and User 2 Pattern Tests These two user programmable (up to 24 characters) patterns enable you to generate a test pattern rather than use pre-programmed patterns or live trafÞc. The Lamp Test Use this test to verify the LEDs. During the test, all LEDs on the front panel illuminate. Troubleshooting Multi-port DSU/CSU Problems The remainder of this chapter discusses problems and possible solutions.
6 Table 6-4 Troubleshooting Multi-port Problems Problem Description and Location The DSU/CSU does not Power Up on page 6-16 The DSU/CSU System does not Dial Out when an Alarm Occurs on page 6-17 There is no FDL Communication with the Remote/far End System on page 6-17 The ESF User Registers do not Clear from the Network Carrier on page 6-17 Current Tests Terminate without your Intervention on page 6-18 The System Cannot be put into Network Loopback from the Carrier on page 6-18 The System cannot be Put
6 ¥ Check all fuses for opens and replace as needed. If the DSU/CSU blows fuses continuously, call Digital Link technical support. The DSU/CSU System does not Dial Out when an Alarm Occurs ¥ Make sure the connection between the Comm Port and the modem is a crossover (null) modem connection. ¥ A DCE port is represented the same way as the modem port. ¥ Make sure Connection is set to Modem and two valid telephone numbers are set in Phone Number 1 and Phone Number 2 in Menu 8 Alarm II.
6 ¥ Make sure the network carrier is using the ANSI T1.403 or AT&T TR54016 protocol. The system does not respond to any other ESF protocols. ¥ If the above steps fail to solve the problem, call Digital Link technical support for assistance. Current Tests Terminate without your Intervention ¥ Make sure the system is set to run the test for an unlimited amount of time. Test length options are 15 min., 1 min., 60 min., Unlimited. With Self Test, Loop Up Remote and Loop Down Remote, Unlimited does not apply.
6 The NET LED does not Illuminate ¥ Run a lamp test from Menu-9 Diagnostics to make sure the LEDs are working. ¥ Make sure the T1 line from your service provider is connected to the DA-15 female connector on the back of the DSU/CSU. ¥ Remove the T1 line from the back of the DSU/CSU and place the T1 test set in its place. Connect the transmit of the T1 test set to the receive of the network plug (pins 3 and 11, 3Ñtip, 11Ñring). If the NET LED changes to any color, i.e.
6 ¥ If, after all above steps have been satisÞed, your DSU/CSU still shows a yellow NET LED, call Digital Link technical support for assistance. The NET LED Flickers Intermittently between Red, Amber, and Green ¥ Make sure the timing source is properly conÞgured. Timing should be set to NETWORK if the network is the source. If it is not the source, timing should be set to INTERNAL at one T1 end, and NETWORK at the other end.
6 ¥ If you have eliminated the above as a cause, place your data test set on the problem portÑif the TD/RD LEDs do not light, call Digital Link technical support for assistance. The Data Port RTS/CTS LEDs do not Illuminate ¥ If your system does not support the RTS or DTR protocol, set the port DTE loss to None (defaultÑRTS) in Menu-2 Data DTE ConÞguration menu. See ConÞguring the Data Ports on page 3-19. The CTS LED should light and remain lit.
6 ¥ If the errors persist, call Digital Link technical support for assistance. LEDs do not Illuminate ¥ Run a lamp test from Menu-9 Diagnostics to make sure the LEDs are working. After Powerup, the Menu Clock no Longer Shows Correct Time or Date ¥ The menu clock is not a real-time clock. Each time you power up, it is reset to a predetermined value. You must enter the correct time and date in the time and date Þelds in Menu-4 Main ConÞguration.
6 No Response from any DSU/CSU on the Communication Network ¥ Make sure Pin 8, CTS, is not connected at the ASCII terminal end of the Comm Port cable. Standard Digital Link Comm Port cables do not have this connection. Some ASCII terminals activate the CTS line and thus interfere with the DSU/CSU collision avoidance. ¥ Get a null modem adapter to cross pins 2 and 3 (transmit and receive for modems) on the terminal.
6 Invalid Data is Received with a Mostly Good Menu Display ¥ Reduce the baud rate on the DSU/CSUs and terminal if you are using the maximum (9600 baud) for communicating with a very large number of DSU/CSUs. ¥ If the cable from the network to the terminal exceeds the 50 ft. maximum, Þx the length. ¥ Verify that none of the DSU/CSUs are missing an ID and that no two DSU/CSUs have the same unit ID.
6 ¥ Network loopback If you suspect that the DSU/CSU is defective, manually place the DSU/CSU in a network loopback to isolate it from the rest of the equipment. The DSU/CSU loops the T1 signal as soon as it arrives and sends it back to the carrier. Run this test from a local terminal. You can also run the Loop Up Remote and Loop Down Remote tests from the front panel. ¥ DTE loopback To verify that your DTE device is able to send and receive signals, manually place the system in a DTE loopback.
6 6-26 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
Technical SpeciÞcations A A Network Interface Table A-1 Network Interface Item SpeciÞcation Receive line rate 1.544Mb/s ±50bp/s Line code AMI, B8ZS Framing D4, ESF ESF FDL AT&T TR54016-1986, AT&T TR54016-1989, ANSI T1.403-1989 Input signal DSX-1, -24dB0 Output signal 0, -7.5dB or -15dB LBO Pulse density AT&T TR62411, HDLC inversion, deferred, B7 stufÞng, forced, AT&T TR54019A, FCC Part 68 Data Interface Table A-2 Data Interface Item SpeciÞcation Interface types V.
A DS1 Interface Table A-3 DS1 Interface Item SpeciÞcation Line Rate N x 56Kb/s & 64Kb/s (N = 1 through 24) ±50b/s Line Rate N x 56Kb/s & 64Kb/s (N = 1 through 24) ±50b/s Line code AMI, B8ZS Framing D4, ESF Equalization 0-655 feet to DSX-point System Timing Internal, network, DS1 port, data port External (N x 56Kb/s & 64Kb/s (N = 1 through 24)) or 1544Kb/s Stratum 4 support SNMP Full embedded SNMP agent based on SNMP v1, supporting RFC 1213, RFC 1406, MIB II, Enterprise MIB A-2 Encore Multi-po
A Front Panel Table A-4 Front Panel Item SpeciÞcation Display Key pad 16 character alphanumeric 4 keys LEDs (per data port) TD, RD, CTS, RTS, DTR, DATA/TEST Status Network port AUX (DSX1) Port Test Bantam jacks T1 Send (IN/MON) T1 Receive (OUT) Power Options Table A-5 Power Options Item SpeciÞcation AC input voltage 110 VAC (for DL100 Encore, DL1200 and DL2400) DC input voltage -48 VDC Power consumption VX Encore 10W maximum DL100 Encore 40W maximum DL1200 Encore 60W maximum DL2400 En
A Alarm Contacts Table A-6 Alarm Contacts Item SpeciÞcation Input Form C dry contacts, NO or NC Activated by application of 20 and to 50 volts Output Form A dry contacts, NO or NC Environmental Table A-7 Environmental Item SpeciÞcation Operating temperature 0 to 50 °C Storage temperature -20 to +60 °C Relative humidity 0 to 95% non-condensing Altitude 15,000 ft. AMSL Table A-8 Mechanical A-4 Item SpeciÞcation VX Encore 17.2"W x 11.75"D x 1.75"H DL100 Encore 17.2"W x 11.75"D x 2.
A Table A-8 Mechanical (Continued) Item SpeciÞcation Comm Port DC-9 socket Network Connector DA-15 socket DTE connector DB-25 socket DS1 connector DA-15 socket External clock BNC, 50 ohm, unipolar signal, Stratum 4, 56 Kbp/s-1.544 Mbp/s minimum voltageÑ2.4 VDC peak to peak maximum voltageÑ5.0 VDC peak to peak Regulatory UL 1459 UL 1950 FCC Part 68 FCC Part 15 Class A CUL (CSA) DOC (IC) ESD Standard compliance: C62.
A Diagnostics and Tests Table A-9 Diagnostics Item SpeciÞcation Loopbacks T1 Network, T1 Payload, Multiple T1 Payload, DTE, Fractional T1 Payload, Fractional DTE T1 Loopback control T1 Set/Reset code, ESF FDL commands, Front Panel, Comm Port Fractional Payload Loopback control CCITT V.
A Reliability and Equipment Life Table A-10 Reliability and Equipment Life Equipment MTBF VX Encore without DS1 port 9.1 years VX Encore with DS1 port 8.9 years DL100 Encore with 2 data ports 7.6 years DL100 Encore with 4 data ports 6.2 years DL100 Encore with 6 data ports 5.3 years DL1200 Encore 3.37 years DL2400 Encore 2.2 years Front Panel LEDs The LEDs on the DSU/CSU front panel show the status of the data port, network port and diagnostic tests.
A The example in Figure A-1 shows the front panel LEDs on a VX Encore. EXIT EFS 100 END TEST PERCENT ENTER T1 DSU/CSU SND SND RCV MON IN MON TEST PORT 2 PORT 2 TD NET TD RD RTS CTS DTR DATA AUX RD RTS CTS DTR DATA TEST TEST LEDs Figure A-1 VX Encore Front Panel Table A-11 Front Panel LEDs Item LED Description TEST Solid green Solid red Power is on; unit has passed Self Test. Power is on; Self Test failed. Red LED remains on for 10 seconds, then turns green.
A Table A-11 Item Front Panel LEDs (Continued) LED Description Green DTE transmitting pulses; DSU/CSU detecting pulses (1s) from DTE. DSU/CSU not detecting pulses from DTE or no DTE connected to data port. PORT 1 and PORT 2 TD OFF RD Green OFF DTE receiving pulses from DSU/CSU. DTE receiving no pulses from DSU/CSU. RTS Yellow OFF RTS line from DTE asserted. RTS line from DTE not asserted. CTS Yellow OFF CTS line to DTE asserted.
A Table A-12 Monitor Jacks. Item Meaning Description SND MON Send Monitor The test equipment monitors the signal sent to the T1 line. Non-intrusive SND IN Send In The test equipment injects data into the T1 line. Intrusive. RCV MON Receive Monitor The test equipment monitors the signal received from the T1 network. Non-intrusive.
A A bare, covered or insulated grounding conductor is acceptable. An individually covered or insulated conductor should have a green, or green with one or more yellow stripes, continuous outer Þnish. The attachment-plug receptacle in the vicinity of the system should be of a grounding type and the grounding conductor serving the receptacle should be connected to earth ground at the service equipment.
A Multi-port DSU/CSU Model Number Table A-14 Model Numbers Item Description DL090-P VX Encore DSU/CSU with SNMP DL090-P-D VX Encore DSU/CSU with SNMP with DS1 port DL100ENC-P-2 DL100 Encore DSU/CSU with SNMP with 2 DTE ports DL100ENC-P-4 DL100 Encore DSU/CSU with SNMP with 4 DTE ports DL100ENC-P-6 DL100 Encore DSU/CSU with SNMP with 6 DTE ports DL1200 DL1200 DSU/CSU DL2400 Dl2400 DSU/CSU DTE Cables Cable to customer equipment DL1301-01 V.35, DB-25 male to M34 socket, 1 ft. DL1301-10 V.
A Factory Default ConÞguration Table A-15 Factory Default ConÞguration Unit ConÞguration Unit IDNo ID assigned Protect Mode Disabled No Yellow Alarm Network ConÞguration Framing ESF Line Code B8ZS LBO 0dB Interface DACS Main Synch. Source Network Alternate Synch Source Internal Digital Link FDL Protocol Enabled ANSI FDL Protocol Enabled FDL Block Aux Port Bit 7 StufÞng No Aux Framing ESF Aux Line Code V.
A Table A-15 Factory Default ConÞguration (Continued) Alarm ConÞguration Block All Alarms No CRC Threshold Alarm Disabled BPV Threshold Alarm Disabled OOF Threshold Alarm Disabled Net Carrier Loss Alarm Enabled Net Sync Loss Alarm Enabled Net AIS Received Alarm Enabled Net Yellow Received Alarm Enabled Loss of Signal from data portEnabled Report External Alarms Disabled External Alarm Input Contacts Normally Open External Alarm Output Contacts Normally Open External Alarm Input Message
A Determining the Distance between the DSU/CSU and the T1 Line Demarcation Point You need to determine the correct distance between the DSU/CSU and the T1 line demarcation point before you connect the T1 cables. Calculate the T1 transmission loss at the premises remote-end. Transmission loss is attributed to cable attenuation (signal loss) from the last telephone company repeater to the DSU/CSU network interface. You do the adjustment with the LBO (L3) which you set in Menu-4 Main ConÞguration.
A ¥ Calculate the T1 transmission using this formula: L1 + L2 + L3 = 15 to 22.5 dB The sum of the two losses, L1 and L2, plus any LBO (Line Build Out) must be greater than 15 dB and less than, or equal to, 22.5 dB at 772 kHz. ¥ Select the required LBO so that: L1 (phone company) + L2 (your loss due to cable length) + L3 (your LBO switch setting) = greater than 15 dB but less than 22.5 dB. Example L1 = 11 dB (Obtained from phone company) L2 = 2 dB (Premises cable length is 400 ft., 1dB per 200 ft.) LBO = 7.
Connector Pin Assignments B B T1 Network Port Pin Assignments Table B-1 Pin DA-15 Network Interface Pin Assignments Signal 1 Send toward Network Tip (T1) 9 Send toward Network Ring (R1) 2 Frame Ground 3 Receive from Network Tip (T) Receive from Network Ring (R) 11 4 Frame Ground 5, 6, 7, 8, 10, 12,13,14,15 N/C AUX DTE Pin Assignments Table B-2 Pin DA-15 Auxiliary DS1 Connector Pin Assignments Signal 1 Receive from DTE Tip (T1) 9 Receive from DTE Ring (R1) 2 Frame Ground B-1
B Table B-2 DA-15 Auxiliary DS1 Connector Pin Assignments Pin Signal 3 Send toward DTE Tip (T1) Send toward DTE Ring (R1) 11 4 Frame Ground 5, 6, 7, 8, 10, 12,13,14,15 N/C DTE Port Pin Assignments The pin assignments for the DB-25 DTE connector are listed in the following four tables. Table B-3 and Table B-4 deÞne DTE port conÞguration. Table B-3 B-2 DB-25 to V.35 DTE Connector Pin Assignments Twisted Pair V.
B Table B-3 DB-25 to V.35 DTE Connector Pin Assignments (Continued) Twisted Pair V.
B Table B-4 DB-25 to RS-449 DTE Connector Pin Assignments (Continued) Twisted Pair RS-449 DB-25 Green 18 25 Yellow 27 13 Red 9 5 Orange 13 8 Red 31 10 Black 26 9 Red 8 17 Green 5 15 Black 23 12 Black 19 7 Blue NC NC Drain 1 NC Communication Port Pin Assignments Table B-5 describes the Comm Port pin assignments for the Multi-port Encore DSU/CSU.
B Table B-5 Communication Port Pin Assignments Pin Signal Description 5 SG Signal Ground (bi-directional) 1 DCD Data Carrier Detect 1. CTS is used by the DSU/CSU as a collision avoidance line. This line should not be connected at the CRT terminal end of the Comm Port cable. Adapter Pin Assignments Digital Link provides a DB-25 to DC-9 adapter for the Digital Link DC-9 Comm Port ribbon cable. The pin-out assignments for the adapter are listed below in Table B-6.
B DTE Clock Rates Table B-7 lists the DTE clock rates. Table B-7 Line Code Network B8ZS 1 1.528 Mb/s 2 3.056 Mb/s 3 4.584 Mb/s 4 6.112 Mb/s 5 7.640 Mb/s 6 9.168 Mb/s 7 10.696 Mb/s 8 12.224 Mb/s 1 1.336 Mb/s 2 2.672 Mb/s 3 4.008 Mb/s 4 5.344 Mb/s 5 6.680 Mb/s 6 8.016 Mb/s 7 9.352 Mb/s 8 10.
ConÞguration Worksheet C C Use this worksheet to keep a written record of your conÞguration. Table C-1 ConÞguration Worksheet Unit ConÞguration Unit ID ......................................... Yellow Alarm ......................................... Protect Mode ......................................... Network ConÞguration Framing ......................................... LBO ......................................... Line Code......................................................................
C Table C-1 ConÞguration Worksheet (Continued) AUX Port ConÞguration Aux Framing ......................................... Aux Line Code ......................................................... Aux Line Code ......................................... Aux Port Bit 7 StufÞng ...................................................... Aux Equalization ......................................... Format .......................................................... ..............................................
C Table C-1 ConÞguration Worksheet (Continued) Alarm ConÞguration Block All Alarms ......................................... CRC Threshold Alarm................................................. BPV Threshold Alarm ......................................... OOF Threshold Alarm................................................ Net Carrier Loss Alarm ......................................... Net Sync Loss Alarm......................................... Net AIS Received Alarm ..............................
C Table C-1 ConÞguration Worksheet (Continued) Comm Port and Terminal ConÞguration Connection ......................................... Terminal Mode.......................................................... Timeout when Logged on ......................................... Phone Number 2....................................................... Timeout when not Logged on ......................................... Phone Number 1....................................................... Comm Port ..........
Glossary G G A ABAM A designation for 22 gauge, 110 ohm, plastic insulated, twisted pair Western Electric cable normally used in central ofÞces. AIS (Alarm Indication Signal) An unframed sequence of All Ones normally sent by a DSU/CSU that cannot maintain the required pulse density in AMI mode or sent by a CSU that has a loss of signal condition on its data port. The signal is sent to maintain continuity of transmission and to notify the far-end that a transmission fault exists on the line.
G asynchronous transmission Transmission not related to a speciÞc frequency, or to the timing of the transmission facility. attenuation Reduction or loss of signal strength, measured in decibels; opposite of gain. B B8ZS (Bipolar 8 Zero Substitution) A technique used to accommodate the ones density requirements of T1 transmission. bandwidth The data-carrying capacity of a transmission medium, usually measured in Hertz (Hz), which equals cycles per second.
G bit/s Bits per second; the basic unit of measure for serial data transmission capacity; Kbits (kilobits) for thousands of bits per second; Mbitps (megabits) for millions of bits per second, and Gbits (gigabits) for billions of bits per second. Blue Alarm An unframed sequence of All Ones normally sent by a DSU/CSU that cannot maintain the required pulse density in AMI mode or sent by a CSU that has a loss of signal condition on its data port.
G clear channel A characteristic of a transmission path or digital circuit in which the full bandwidth is available to the user. The phone company does not use any portion of the bandwidth for framing or control bits. clock An oscillator-generated signal providing a timing reference for a transmission link; used to control timing functions such as sampling interval, signaling rate and duration of signal elements.
G CSU (Channel Service Unit) The CPE used to terminate a digital circuit at the customer site. The CSU performs certain line-conditioning functions, ensures network compliance to FCC rules and responds to loopback commands. It ensures proper ones density in the bit stream and performs bipolar violation correction. The DSU and CSU are often in the same unit. CTS (Clear to Send) A signal issued by the DSU to indicate it is connected to the digital network and is ready to accept data.
G DCE (Data Circuit-Terminating Equipment) Equipment that is either a part of the network, an access point to the network, a network node, or equipment at which a network circuit terminates. dial-up Describing the process of, or the equipment or facilities involved in, establishing a temporary connection via the switched telephone network.
G DSU Loopback A DSU loopback is intended to include as much of the customer data communications circuitry in the looped-back path as possible. The signal passes from the remote unit into the local unit as far as the DSU. This test loops the received network signal back to the network. DSU/CSU (Data Service Unit/Channel Service Units) The pair of communications devices that connect an in-house line to an external digital circuit.
G encoding/decoding The process of reformatting information into a format suitable for transmission, and then recovering it after transmission. equalization The spacing and operation of ampliÞers so that the gain provided by the ampliÞer, per transmission frequency, coincides with the signal loss at the same frequency; circuitry that compensates for the differences in attenuation at different frequencies.
G fractional bandwidth DTE loopback A loopback test that loops back the signal at the network interface. See also loopback. Fractional T1 A service that provides less than full T1 capacity (one or more 64 Kbps channels are provided). frame A group of bits sent serially over a communications channel. The basic data transmission unit employed with bit oriented protocols. frame relay A high-speed packet switching protocol used for wide area networks (WANs); faster than traditional X.
G HDLC (High Level Data Link Control) Bit-oriented, data-link control protocol; any related control of data links by speciÞed series of bits, rather than by control characters. I IP address A unique, 32-bit identiÞer for a TCP/IP host on a network. IP addresses are normally printed in dotted decimal form, such as L LBO (Line Build Out) An adjustable value used to tune the attenuation between the DSU/CSU card and the last repeater on the T1 circuit.
G LT (Local Test) A data port signal to DSU/CSU. M mask Refer to subnet mask. MIB (Management Information Base) A structure that deÞnes what is obtainable from a network device and what can be controlled. It has a directory listing the logical names of all information resources residing in the network and pertinent to the network's management. It is used to describe network management variables. multiplexer Any device that allows two or more users to share a common physical transmission medium.
G NI (Network Interface) The point of demarcation between the customer premises and the carrier's network, usually drawn at the network connector on the rear panel of the Digital Link access device. NRZ (Non-Return to Zero) A binary encoding and transmission scheme where ÒonesÓ and ÒzerosÓ are represented by opposite, and alternating, high and low voltages.
G protocol A formal set of rules governing the format, timing, sequencing and error control of exchanged messages on a data network. R RD (Receive Data) A data port signal. receiver The receiver synchronizes the framing pattern, separates the frame bits from the payload data and monitors for frame errors in 64K mode. It achieves frame synchronization within 5msec (ANSI T1.410-1992 Section 8.2).
G RS-232-C An EIA speciÞed physical interface, with associated electrical signaling, between data circuit terminating equipment (DCE) and data terminating equipment (DTE). RS-449 A common 37-position interface for data terminal equipment and data circuit terminating equipment employing serial binary data interchange. It is a balanced interface, based on unipolar digital signals, depending more on current ßow than voltage, therefore supports greater distances than the RS-232 interface.
G serial transmission A sequential transmission of bits constituting an entity of data over a data circuit. SES (Severely Errored Second) A second during which 320 or more CRC violations or OOF events have occurred (ESF framing only). SG (Signal Ground) A signal from DTE to DSU/CSU. simplex current One way transmission used by Telco to provide power to repeaters. SLIP (Serial Line IP) A TCP/IP protocol that allows IP packets to be transmitted over a serial link, such as a dial-up or private telephone line.
G synchronous transmission Data communications in which characters or bits are sent at a Þxed rate and the transmitting and receiving devices are synchronized. T T1 A digital carrier facility used to transmit a DS-1 formatted digital signal at 1.544 Mbit/s. T-1 normally can handle 24 voice conversations, each one digitized at 64kbps. But, with more advanced digital voice encoding techniques, it can handle more voice channels. T-1 is a standard for digital transmission in North America.
G UAS (Unavailable Seconds) Number of seconds elapsed after 10 consecutive SES events are received (ESF framing only). V V.35 A CCITT standard for the trunk interface between a network access device and a packet network. It deÞnes signaling for data rates greater than 19.2 Kbps. V.52 Terminal emulation standard. CCITT standard (1976) for various loopback tests that can be incorporated into modems for testing the telephone circuit and isolating transmission problems.
G G-18 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
Index A ABAM T1 network cable 2-12 AC power supply troubleshooting 6-16 AIS (Alarm Indication Signal) NET AIS Received Alarm 3-36 alarms configuring 3-42 how alarms are reported 3-33 troubleshooting 6-17 allocating timeslots 3-21 AMI T1 line code format Menu-4 Main Configuration 3-15, 3-18 testing 6-13 ANSI FDL Protocol ESF user registers 6-17 Menu-4 Main Configuration 3-17 troubleshooting T1.
I Menu-4 Main Configuration 3-15, 3-18 DA-15 connector 2-2, 2-12, 2-13, 6-15, 6-19 DACs mode troubleshooting 6-17 daisy-chaining DSU/CSUs 3-5 data port alarms 3-33 troubleshooting 6-21 data test set 6-15 Fireberd 6000 6-15 troubleshooting 6-21 date configuring 3-13 DB-25 connector 2-11, 2-12 DC power troubleshooting 6-16 DC-9 connector 2-2 DCE mode 2-11 connecting DTE cable 2-11 diagnostics how to run a test 6-2 Loop DTE test 6-7 Loop NET test 6-8 Loop Payload test 6-9 Loop Payload test 6-1 Loop Up/Down Rem
I L lamp test troubleshooting 6-19, 6-20, 6-21, 6-22 LBO (Line Build Out) 3-15 LEDs A-8 troubleshooting data port 6-20 line code Menu-4 Main Configuration 3-15, 3-18 troubleshooting AMI 6-21 LOFC (Loss of Frame Count) 4-12 logging off 3-9 logging on with Superuser or Normal User password 3-7 loopback tests Loop DTE test 6-7 Loop NET test 6-8, 6-10, 6-25 Loop Payload test 6-9 Loop Up/Down Remote test 6-1 troubleshooting 6-24 loss of signal on data port 3-14, 3-33 on data port 3-20 M managing and monitoring 4
I RS-449 data converting 1-1 RS-449 interface connecting DTE cable 2-11 troubleshooting DTE cable 6-21 RS-449 interface 3-17 RTS 3-20 troubleshooting data port 6-21 RTS (Request To Send) Menu-5 Data Port Configuration 3-20 S security configuring alarms 3-32 Self Test running 2-6, 2-8, 2-10, 6-7 simplex power handling with caution 2-2 SNMP (Simple Network Management Protocol) configuring 3-30 Menu-0 SNMP Config.
I X X.
I I-6 Encore Multi-port DSU/CSU User GuideÑJuly, 1997 G
