DL600E E1 Data Multiplexer UserÕs Guide
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. Digital Link Corporation 217 Humboldt Court Sunnyvale, California 94089 (408) 745-6200 FAX (408) 745-6250 www.dl.com info@dl.com 098-00961-01 Rev.
Product Limited Warranty Digital Link warrants to buyer that any unit shipped to buyer, under normal and proper use, will be free from defects in material and workmanship for a period of 24 months from the date of shipment to buyer. This warranty will not apply to any unit repaired by anyone other than the Digital Link or its authorized agent.
Disclaimer Digital Link Corporation makes no representation of warranties with respect to the contents of this document and speciÞcally disclaims any implied warranties of merchantability or Þtness for any particular purpose. Further, Digital Link Corporation reserves the right to revise this publication and to make changes in it from time to time without obligation to notify any person or organization of such revision or changes.
Regulatory Compliance Standards To maintain EMC Class B (CE Label) compliance, shielded cables should be used with the unit. The Digital Link DL600E module complies with ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ CE MARK BABT NTR4 Austel TS016 Swedish SS636334 German M†9a/b Australian AS 3260 FCC part 15 Class A UL 1950 3rd Edition CAN/CSA C22.2. No.
Table of Contents Preface xvii About this Manual xviii Audience xviii Organization xviii Symbols xix Typographic Conventions xix Digital Link Technical Support xx Send Us Your Comments xxi When Returning a Unit xxi Chapter 1 About the DL600E Unit 1-1 Introducing the DL600E Unit 1-2 DL600E Features 1-4 About the Telnet Utility 1-5 Applications 1-5 Chapter 2 Installing the DL600E Unit 2-1 Preparing for the Installation 2-2 Checking the Equipment 2-2 Equipment Model Numbers 2-3 Gathering Information
Chapter 3 Configuring the DL600E Unit 3-1 Preparing to Configure 3-2 Keeping a Record 3-2 Connecting an ASCII Terminal 3-2 Logging on to the DL600E Terminal Interface 3-6 Before You Begin 3-9 Overview of the Configuration 3-9 Setting the Unit ID, Date and Time 3-10 Configuring the E1 Network and AUX E1 Port Parameters Downloading New Software 3-13 System Messages and Error Indicators 3-14 Configuring the Data Port 3-16 Allocating Timeslots 3-17 Two Allocation Methods 3-17 Configuring for SNMP 3-21 SNMP P
Chapter 5 Using the Front Panel Interface 5-1 Introduction 5-2 What You CanÕt Do From the Front Panel Interface 5-2 Front Panel Description 5-3 How to Navigate the Front Panel Interface 5-3 Display Description 5-4 Editing a Parameter 5-6 Preparing for the Initial Configuration 5-7 Required Information 5-7 Keeping a Record 5-7 Configuring the Unit and Network Parameters 5-8 The UNIT CONFIG Submenu 5-9 Configuring the Data Ports 5-14 Allocating Timeslots 5-14 Displaying the Timeslot Allocation 5-15 The TIM
Appendix A DL600E Technical Specifications A-1 Technical Specifications A-2 SNMP A-3 Terminal Supported A-4 Equipment Grounding Conductor A-4 Front Panel LEDs and Buttons A-4 Factory Default Configuration A-7 Configuration Worksheet A-8 DL600E Model Numbers A-9 Appendix B Connector and Pin Assignments B-1 E1 Network Pin Assignments B-2 DL600E-to-Equipment Pin Assignments B-3 DB25-to-DC-37 (RS449) Data Port Connector Pin Assignments B-5 DB25-to-M-34 (V.
Table of Figures Figure 1-1 Figure 1-2 Figure 2-1 Figure 2-2 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 4-1 Figure 4-2 Figure 4-3 Figure 5-1 Figure 6-1 Figure 6-2 Figure 6-3 Figure 6-4 Figure 6-5 Front View of the DL600E Unit 1-3 Back View of the DL600E Unit 1-3 DL600E Rear Panel Showing Power Connections 2-4 DL600E Rear Panel Showing Network Connections 2-7 Comm Port on the Back Panel 3-4 Menu-4 Main Configuration 3-10 Menu-5 Data Port Configuration 3-16 Menu-6 Tim
xiv DL600E E1 Data Multiplexer UserÕs Guide
Table of Tables Table 3-1 Table 3-2 Table 3-3 Table 6-1 DL600E Software Download Errors 3-15 DL600E Alarm Conditions 3-24 DL600E Alarm Conditions and System Action 3-27 Self Test Error Indicators 6-6
xvi DL600E E1 Data Multiplexer UserÕs Guide
Preface ¥ About this Manual xviii ¥ Digital Link Technical Support xx ¥ Send Us Your Comments xxi ¥ When Returning a Unit xxi Ensemble Encore UserÕs Guide
About this Manual The DL600E E1 Data Multiplexer UserÕs Guide provides information to install, conÞgure, test, operate and manage the DL600 Encore E1 Data Service Unit. Throughout this manual, ÒDL600E unitÓ is used to refer to the DL600 Encore E1 Data Service unit. Audience This guide is intended for experienced network managers and technicians who install LAN to WAN equipment. Users should be thoroughly familiar with the network topology in which the DL600E will operate.
Symbols The following symbol means it is very important to follow instructions carefully: Warning! The following symbol means you must follow the instructions carefully to avoid possible risk of electrical shock: Warning! Typographic Conventions The procedures in this guide are offset with horizontal lines and each step in a procedure is numbered. Single step procedures are not numbered. This guide uses the following typographic conventions: ¥ Key words appear in boldface to draw your attention.
Digital Link Technical Support If you encounter a problem with the DL600E unit, prepare the following information and contact Digital Link Technical Support.
Send Us Your Comments We want to know if this manual meets your needs. Help us improve our service by sending us your comments. Tell us what parts of the manual work for you, what parts do not, and what is missing. You can send your comments and suggestions to: ¥ Digital Link Technical Publications facsimile: (408) 745-6250 or ¥ Digital Link E-mail: techpubs@dl.
xxii DL600E E1 Data Multiplexer UserÕs Guide
1 About the DL600E Unit ¥ Introducing the DL600E Unit 1-2 ¥ DL600E Features 1-4 ¥ About the Telnet Utility 1-5 ¥ Applications 1-5
Introducing the DL600E Unit The DL600E unit is an intelligent E1 multiplexer and Data Service Unit (DSU). It is Data Terminal Equipment (DTE) that accesses public and private E1 and fractional E1 and Frame Relay services. The DL600E unit provides either two or four data ports for multiplexing (DTE) devices and an optional E1 Drop-and-Insert port. It converts V.35 and X.21 compatible DTE data for E1/FE1 network transport.
. TD RD RTS CTS DTR DATA TD RD DL600E RTS CTS DTR DATA DATA 3 NCORE DATA 4 TEST DATA MULTIPLEXER TEST MON MON TEST NET EXIT END TEST ENTER Figure 1-1 TD RD RTS CTS DTR DATA TEST DATA 1 SND RCV RX TX RX RD DATA 2 -40 - 72VDC, 1.
DL600E Features The DL600E unit offers the following service, access and management features: Service Features ¥ E1/FE1 point-to-point connectivity ¥ Multiplex two or four DTE data sources to E1/FE1 network ¥ Access to cell and packet-based services such as Frame Relay and SMDS ¥ Drop-and-Insert port (optional) ¥ In-band communications with the remote unit ¥ In-band fractional loopbacks ¥ Integrated network interface ¥ Control and configuration through easy front panel operation, local or remote ÒsmartÓ te
¥ Performance monitoring and built-in test patterns and diagnostic tools to help maintain the line and troubleshoot problems on full or fractional E1 bandwidth ¥ Alarm reports sent to a terminal, printer or dialed-out ¥ Ability to download code upgrades ¥ Supports external alarms ¥ Co-located units can be daisy-chained to single communication point Compliancy Compliance with G.703 and G.
1-6 DL600E E1 Data Multiplexer UserÕs Guide
2 Installing the DL600E Unit ¥ Preparing for the Installation 2-2 ¥ Installing the DL600E Unit Using AC Power 2-4 ¥ Installing the DL600E Unit Using DC Power 2-5 ¥ Connecting to a DTE Device and the Network 2-7
Preparing for the Installation This chapter describes how to install the DL600E unit. Once you have installed the DL600E unit, go to Chapter 3, ÒConÞguring the DL600E Unit,Ó for procedures explaining how to connect a terminal and conÞgure the DL600E unit. Before you begin the installation, you need to: ¥ Unpack and inspect the DL600E unit for damage that may have occurred during shipment. Wipe the exterior with a soft cloth, if necessary. ¥ Save all enclosed packing slips and documents.
Network port interface cable Cables with DA15 plug connector or Cables with DA15 plug connector on one end and BNC connector on the other end for coaxial interface Coaxial cable for BNC connectors The send and receive pairs of the E1 cable are shielded separately to minimize crosstalk Power cord AC power cord ordered from Digital Link for an AC model or Customer-supplied power cable (14 AWG, 3 conductors, copperstrand wire, type TC) for a DC model Customer-supplied grounding cable Cable used to connect DL
About the Power Supply The DL600E unit can operate on either AC and DC power supplies. When the unit is ordered AC or DC must be speciÞed. ¥ AC power ÑThe DL600E unit can be powered from 100 to 240V AC, 50-60 Hz. ¥ DC power ÑThe DL600E unit operates on -48VDC to -72VDC sources. The respective DC leads must not be crossed. Instructions for both installing the DL600E unit for AC power and installing the DL600E unit for DC power are explained later in this chapter.
Installing the DL600E Unit Using DC Power Allow two to three feet of clearance around the DL600E unit to give you access during the installation. Warning! Take care when connecting to DC power. If you connect the DL600E unit improperly, you may damage it. To Connect the DL600E Unit to DC Power Use only a DC cable that is UL recognized 14 AWG, 3 conductors, copper strand wire, electrical power and control cable, type TC. An example is: 600 V, 90 degree C. Alpha Wire Company No. 45443.
8 To minimize disturbance to the wires through casual contact, secure the DC cable to the rack frame using multiple cable ties. Use at least four cable ties, a minimum of 4 inches (10.16 cm.) apart. The Þrst tie should be within 6 inches (15.24 cm.) of the terminal block. (A cable tie mount is provided.) 9 Turn on the DC power source. The LEDs on the front panel ßash as the DL600E unit automatically runs the Self Test at power up.
Connecting to a DTE Device and the Network To connect the DL600E unit to a DTE device and to the network, refer to Figure 2-2 and use the following procedure: CAUTION: WHEN AC POWERED SAFETY REQUIRMENTS ARE NOT FULFILLED UNLESS EQUIPMENT IS CONNECTED TO A WALL SOCKET OUTLET WITH PROTECTIVE EARTH CONTACT AUX RX TX NET NET Figure 2-2 RX TX AUX DATA 4 DATA 3 COMM DATA 2 EXT CLOCK DATA 1 DL600E Rear Panel Showing Network Connections 1 Connect the data port interface cable to the DL600E DB25 s
2-8 DL600E E1 Data Multiplexer UserÕs Guide
3 ConÞguring the DL600E Unit ¥ Preparing to ConÞgure 3-2 ¥ Setting the Unit ID, Date and Time 3-10 ¥ ConÞguring the E1 Network and AUX E1 Port Parameters 3-11 ¥ ConÞguring the Data Port 3-16 ¥ Allocating Timeslots 3-17 ¥ ConÞguring for SNMP 3-21 ¥ ConÞguring Two Levels of Access Rights 3-23 ¥ ConÞguring Two Levels of Access Rights 3-23 ¥ ConÞguring Alarm Conditions 3-24
This chapter describes how to conÞgure the DL600E unit using its terminal interface. D Note: The DL600E unit can be partially conÞgured from the front panel, which is the same as conÞguring from a terminal. Instructions for using the front panel to conÞgure the DL600E unit is found in Chapter 5, Using the Front Panel Interface.
Checking the Comm Port Settings The default Comm Port settings are: ¥ Baud rateÑ 9600 ¥ Parity bitÑNone ¥ Word lengthÑ 8 ¥ Stop bitsÑ 2 If the settings on the terminal or modem do not match those on the DL600E unit, change them D Note: You can also change the DL600E Comm Port settings. Refer to ÒThe Comm Port SettingsÓ in Chapter 5 for instructions.
Comm Port CAUTION: WHEN AC POWERED SAFETY REQUIRMENTS ARE NOT FULFILLED UNLESS EQUIPMENT IS CONNECTED TO A WALL SOCKET OUTLET WITH PROTECTIVE EARTH CONTACT X RX TX RX -40 - 72VDC, 1.0A DC TX DATA 4 DATA 3 DATA 2 ALARM POWER IN RTN OUT - + CAUTION: TO PROTECT AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE AND RATING OF FUSE, THIS EQUIPMENT TO BE INSTALLED BY SERVICE PERSONNEL POWER 100-240V~50-60Hz MAX 1.0A S FU E S FU E T NET AUX COMM Figure 3-1 EXT CLOCK DATA 1 FUSE T1.
Connecting DL600E Units in a Daisy Chain You can daisy chain up to 60 DL600E units for centralized network monitoring and management. Use an RS-232 ribbon-type cable with DE9 connectors (available from Digital Link). D Note: CTS (pin 8) must be connected between DL600E units, but it must not be connected to the terminal. If you are using a cable not provided by Digital Link, refer to Comm Port pin assignments in Appendix B.
Logging on to the DL600E Terminal Interface Use one of two methods to access the terminal interface: ¥ From a terminal connected (directly or through a modem) to the DL600E Comm Port ¥ From a remote terminal Telnet connection User Access Rights Two levels of access rights are available when you log on to the DL600E unit: ¥ Superuser access rights ¥ Normal User access rights With the Superuser password, you can ¥ Log off a Normal User already logged on the DL600E unit ¥ Change both passwords ¥ Clear b
2 If the unit is password protected and no other user is logged on, you are prompted: Current Unit ID is MAUI. Now you need a password to log in: Type in the Superuser or Normal User password and press Return . Menu-1 Main Status appears. (Refer to Chapter 4.) If it does not, you may have an incorrect ID, a bad connection on the Comm Port or a bad Comm Port conÞguration. Systems with blank IDs are always logged on and cannot be logged off until a unit ID is assigned.
Logging on Using a Telnet Connection To log on to the DL600E unit user interface using a Telnet connection: 1 Enter the telnet command and the DL600E IP address. Example of system response: Current Unit ID is MAUI. Now you need a password to log in: 2 Enter the Normal User or Superuser password. The system logs you off after Þve unsuccessful attempts to log on. Logging on in Other Conditions The system responds differently depending on the log on conditions on the DL600E unit.
Logging off To log off, press C t r l - x . You are logged off when the terminal stops responding to your keystrokes. Before You Begin To conÞgure the local or remote DL600E unit, use the menus in the terminal interface or the SNMP network management program. The following sections describe how to use the terminal interface. Using the Terminal Interface To use the terminal interface, you must Þrst be in Terminal Mode. Terminal Mode is the default mode.
¥ Parameters of the Data and AUX E1 ports in Menu-5 Data Port ConÞguration ¥ Timeslot allocations in Menu-6 Timeslot ConÞguration ¥ SNMP parameters in Menu-0 SNMP ConÞg (if required) ¥ Alarm conditions, thresholds, and passwords in Menu-7 Alarm I and Menu-8 Alarm II About the Remote System The status and conÞguration of the remote system appear on the menuÕs right side if the remote and local systems have an In-Band Communication Link over a national bit.
D Note: The screen may contain parameters that apply only to the remote unit. In the example in Figure 3-2 , the remote unit is a DL600E unit with an AUX port. To set the date and time: 1 Move to the date or time Þeld using the Arrows and press Return to select the field. 2 Enter the date or time as indicated by the prompt and press Return . Example: 4/8/95 yields 4/08/95 and 22:6:7 yields 22:06:07 (The clock is a 24-hour clock.
and the CRC values are compared. If they do not match, the frame is considered bad and the CRC statistic is incremented. Line Impedance Ñ75 OHM (BNC) or 120 OHM (DA15) (DefaultÑ 75 OHM) Appears in Menu-4 only when the remote unit is a DL600E unit. The Line Impedance can be 75 OHMÑBNC unbalanced or 120 OHMÑDB15 balanced. Main/Alt Sync ÑINT, EXT[n], NET, and DATA [1] (DTE) (DefaultÑNET/INT) Select the E1 network transmitterÕs clock source. First specify the Main clock source, then the Alternate.
AUX and AUX E1 Port The two AUX parameters appear if the DL600E unit has the E1 drop-and-insert port and/or when the remote unit is a DL600E unit with the E1 drop-and-drag insert option present. All other units make the parameter appear blank. CRC4 ÑEnabled or Disabled (DefaultÑEnabled) Same as CRC4 on page 3-11. Line Impedance Ñ120 OHM, 75 OHM Same as 75/120 OHM on page 3-12. Downloading New Software To download new software or a new download utility, use the DOWNLOAD UTILITY 0.
The system prompts (if s or d is chosen): Please start the XMODEM download. Type CTRL-X to abort. 4 From the terminal, select XMODEM transmission and specify the Þlename of the new software on the diskette. 5 The system informs you of a successful or unsuccessful operation. In each case (including a cancelled operation), it prompts: Please type Y to reset the unit. [Y]: Type y to reset the unit. The system prompts: Please wait... Unit is being reset.
Download RAM AllocatedÑBAD indicates that the DL600E download utility resident in RAM is corrupted and a successful download operation is not possible. If the download utility or the operational software fails, the following failure statement and a corresponding error message given in Table 2-1 appears: The download operation failed.
Configuring the Data Port To conÞgure a data port, use Menu-5 Data Port ConÞguration. Set the parameters for the local and remote units. SW Ver 1.0 HW Ver A MIB Ver 1.1 Local: DATA1 DATA2 DATA3 DATA4 Loss NONE NONE NONE NONE MODE DTE DTE DTE DTE Digital Link DL600 Encore Menu-5 Data Port Configuration OAHU Remote: Format X.21 X.21 X.21 X.21 Clock SCTE SCTE SCTE SCTE Loss NONE MODE DTE 4/22/95 2:43:58 MAUI Format X.21 Clock CTE 0-SNMP Config.
Format ÑV.35 or X.21 (DefaultÑV.35) Select V.35 or X.21 operation. You can select RS-449 and EIA-530 by using different cables. ClockÑ+SCT, -SCT, or SCTE (DefaultÑ +SCTE) For DTE timing, select SCT, a unipolar clock generated by the DCE. You can invert the clock (-SCT) or not (+SCT). Use SCT inversion (-SCT) and SCTE to correct delays in clocking due to cable length. When the data port is a DCE, select any of the three options. When he data port is a DTE, you must select SCTE.
SW Ver 1.0 MIB Ver 1.
2 To specify Data Port 1: Ñ Press the Down Arrow to move to Allocate by Port and Return to activate edit mode. Ñ Press 0 1 (for Data Port 01) and Return . D01 appears in Allocate by Port and the start timeslot begins to blink. (You can specify only port 1.) 3 To specify the start timeslot and end timeslot: Ñ Press 1 and Return to specify start timeslot 1. DATA01 TS01 appears; end timeslot Þeld starts to blink. Ñ Press 1 4 and Return and y for timeslot 14.
Ñ Press i for IDLE and Return , then y to conÞrm. Ñ _ _ _ _ A dashed blank line appears in timeslot 1. Ñ Press L and y for Local in response to the prompt: Do you want to change the local unit, the remote unit, or both (L, R, or B)? 3 Use the same method to conÞgure the other slots to IDLE. 4 To conÞgure timeslots 3, 7, 9, 13 and 15 for Data Port 1. Ñ Move to the speciÞc timeslot using the Arrows and press Return to activate edit mode.
ConÞguring for SNMP ConÞgure each unit for SNMP management functionality in Menu-0 SNMP ConÞg. In the example in Figure 3-5 the remote is a DL600E unit, a Solo E1 DSV unit, or a Solo E1 Ensemble Shelf Module. SW Ver 1.0 MIB Ver 1.1 HW Ver A UNIT SNMP IP Address IP Mask Forward Over IBC TRAP 1st NMS IP Address 2nd NMS IP Address 3rd NMS IP Address Output Port Community Strings Get Set Trap Digital Link DL600 Encore Memu-0 SNMP Config. 4/22/95 12:56:56 Local: OAHU Remote: MAUI Disabled 0.0.0.0 0.0.
Forward Over IBC (In-Band Communication)ÑEnabled or Disabled (DefaultÑDisabled) EnabledÑEnables the automatic forwarding of SNMP packets over In-Band Communication from the local DL600E unit to the remote unit. TRAP 1st NMS IP Address Ñnnn.nnn.nnn.nnn (DefaultÑ0.0.0.0) nnn = 0 through 255 Enter the IP address of the Þrst Network Management Server. The DL600E unit sends trap messages to this server.
Trap (text string) (Default Ñ public) Enter an alphanumeric text string (maximumÑ32 characters) which the DL600E SNMP agent inserts in SNMP TRAPs it sends to the SNMP management stations. ConÞguring Two Levels of Access Rights You can create two levels of access rights to the DL600E terminal interface: Superuser access rights and Normal User access rights . Do this by entering unique Superuser and Normal User passwords in Menu-8 Alarms II.
ConÞguring Alarm Conditions Set alarm conditions in Menu-7 Alarm I and Menu-8 Alarm II. They are based on the following events: Table 4-1 DL600E Alarm Conditions Alarm Source Events E1 Network port Loss of Carrier, Loss of Sync, (UA1) Unframed All 1s Received, (RAI) Remote Alarm Indication Received, Code Violation Threshold Exceeded, CRC Error Threshold Exceeded.
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. Alarms are displayed the same way on a remote terminal connected by a Telnet connection. In SNMP mode, the system sends the alarm as an SNMP TRAP to the SNMP manager which displays it on the SNMP console. ConÞguring Alarms To receive an alarm report, set the alarm to Enabled in Menu-7 Alarm I or Menu-8 Alarm II.
Figure 3-6, the remote unit is a DL600E unit, Solo E1 unit or A Solo E1 Ensemble Shelf Module. Menu-7 Alarm I Parameters Block All Alarms ÑYes, No (DefaultÑNo) YesÑBlocks the reporting of alarms. NoÑEnables the DL600E unit to report alarms. NET Carrier Loss Alarm ÑEnabled, Disabled (DefaultÑEnabled) EnabledÑThe DL600E unit generates an alarm when a Network Carrier Loss of Signal occurs. DisabledÑDisables the function.
CRC4 Threshold Alarm Ñ(Cyclic Redundancy Check) A x 10 ^ B (DefaultÑDisabled) Set A and B in A x 10 ^ B. Maximum threshold is 1; minimum threshold is 1.7 x 10-5. Example: 1.2 x 10-2 The alarm is generated when the CRC4s exceed the threshold. FE Threshold Alarm (Frame Error Event) ÑA x 10 ^ B (DefaultÑDisabled) Appears in the menu only when the remote unit is a DL600E unit and applies only to it. Set A and B in A x 10 ^ B. Maximum threshold is 7.5 x 10-2; minimum threshold is 2.1 x 10-6.
SW Ver 1.0 SW Ver 1.0 HW Ver A External External External External External Alarm Alarm Alarm Alarm Alarm MIB 1.11.
External Alarm Input Message Ñ(20 characters maximum) Appears in the menu only when the remote unit is a DL600E unit and applies only to it. Enter an alarm message (20 maximum) that will appear when an external alarm occurs. External Alarm Input Indication must be enabled and External Alarm Input Contacts must be properly set. External Alarm Output Indication ÑEnabled, Disabled (DefaultÑDisabled) Appears in the menu only when the remote unit is a DL600E unit and applies only to it.
Phone Number 1 Enter a valid telephone number (20 characters maximum). The modem dials out using the Þrst telephone number, then automatically tries the second telephone number if the Þrst does not respond. Phone Number 2 Enter a valid telephone number (20 characters maximum). Normal User PasswordÑ(text string) Enter the login password for the Normal User (10 characters maximum). Superuser Password Ñ(text string) Enter the login password for the Superuser (10 characters maximum).
4 Monitoring and Managing the DL600E Unit ¥ Introduction 4-2 ¥ Logging on to the DL600E 4-2 ¥ Logging Off 4-6 ¥ Monitoring Status 4-6 ¥ Displaying Performance Reports 4-11
Introduction The DL600E unit collects and displays performance data as well as additional data useful for network troubleshooting. You can monitor and manage the unit from a terminal, remote terminal Telnet connection, or an SNMP management station. The DL600E unit monitors the E1 line continuously and displays all collected data on the terminal screen.
¥ Change both passwords ¥ Clear both passwords giving Superuser access to all users With the Normal User password, you can: ¥ Log on only when no one is logged on ¥ Be logged off by a Superuser The Superuser and Normal User passwords are set in Menu-8 Alarms II. Refer to ÒConÞguring Two Level of Access RightsÓ in Chapter 3. The conditions for logging on differ when the DL600E terminal interface is free and when another user is already logged on. They are described in the following sections.
Logging on In Other Conditions The system responds differently depending on the log on conditions on the DL600E unit. System messages and your action Condition on DL600E Case A System: Normal User logged on. Current Unit ID is MAUI. The Terminal User Interface is already in use. Please enter the Superuser password to force the other user to log off or type and try again later. ¥ Enter the Superuser password to log off the Normal User.
Logging On Using a Telnet Connection To log on to the DL600E user interface using a Telnet connection: 1 Enter the telnet command and the DL600E IP address. Example of system response: Current Unit ID is MAUI. Now you need a password to log in: 2 Enter the Normal User or Superuser password. Logging On In Other Conditions The system responds differently depending on the log on conditions on the DL600E unit.
Logging Off To log off, press Ctrl-x. You are logged off when the terminal stops responding to keystrokes. Monitoring Status Monitor the status of the DL600E unit from Menu-1 Main Status and the status of its data ports from Menu-2 Data DTE Status. Figure 4-1 shows an example of Menu-1 Main Status. The remote unit is a DL600E unit with an AUX port. SW Ver 1.0 MIB Ver 1.
Menu-1 Main Status Parameters All parameters in Menu-1 are read-only. Unit Status Unit Status indicates if the DL600E unit is operating normally or if any special conditions exits. When the DL600E unit is executing a test, the test is indicated in this Þeld. (If the test is running on a port, the port appears in parenthesis.
Network Status Network Status indicates any abnormal conditions present on the received E1 signal. Indication Description Normal Loss of Signal Loss of Frame RAI Received UA1 Received Set Code Received Reset Code Received CV Threshold Exceeded CRC Threshold Exceeded FE Threshold Exceeded No abnormal conditions exist Network signal is missing. Network frame is missing. Unit has received RAI. Unit has received UA1. Unit has received set code. Unit has received reset code. CV Threshold exceeded.
Remote AUX DTE Status Remote AUX DTE Status appears only when the remote unit has an AUX port and applies only to the AUX port. Indication Description Normal Loss of Signal No abnormal conditions exist Loss of DTR or RTS DTE lines, user deÞned. Unit has received Loss of Frame signal Unit has received RAI. Unit has received UAI. Blank for local DL600E unit.
Seconds in Current 15 Min. Displays the number of seconds elapsed in the current 15-minute interval. Errored Seconds in Interval Displays the number of errored seconds elapsed in the current 15-minute interval. Menu-2 Data DTE Status Menu-2 Data DTE Status shows the current status of the selected data port of the DL600E unit and the data port(s) of a remote unit.
Signal Loss and Local Test are mutually exclusive because the DL600E unit uses the same interface lines to initiate the test and to indicate the signal loss. Displaying Performance Reports To manage and monitor the DL600E unit, use Menu-3 Performance Reports which displays performance data for the previous 24 hours. Figure 4-3 shows an example of the DL600E as a remote unit. SW Ver 1.0 MIB Ver 1.
Events in the Performance Reports The events in the Menu-3 Performance Reports are Errored Seconds (ES) A second with one or more CRC errors. Cyclic Redundancy Check (CRC) The CRC count is incremented in this error checking feature, which compares frames at each end. When the frames do not match, they are considered bad and the CRC is incremented. CVs (CV) Number of Code Violations. Framing Errors (FE) Number of frame errors.
5 Using the Front Panel Interface ¥ Introduction 5-2 ¥ Preparing for the Initial ConÞguration 5-7 ¥ ConÞguring the Unit and Network Parameters 5-13 ¥ Allocating Timeslots 5-14 ¥ ConÞguring for SNMP 5-18 ¥ Using the MONITOR Menu 5-19 ¥ Using the TEST Menu 5-20
Introduction This chapter describes the front panel interface of the DL600E unit. The front panel interface lets you: ¥ View and change the DL600E conÞguration from the CONFIGURATION menu ¥ Monitor and manage the DL600E unit from the MONITOR menu ¥ Run diagnostic tests on the DL600E unit from the TEST menu The front panel interface is easy to use if you are an experienced user. If you are not, the best way to learn the systemÕs contents and organization is to use the terminal interface.
Front Panel Description The front panel interface, shown in Figure 6-1, consists of a 16-character ßuorescent display and four keys. The interface displays one line of information at a time. Use the four keys to interact with the front panel interface. 16-character Fluorescent display TD RD RTS CTS DTR DATA DATA 3 TEST MON MON TEST EXIT END TEST ENTER SND RCV Four keys Figure 6-1 Front Panel Interface If the DL600E unit is the remote unit, the left most character of the display is an R.
Each menu may contain submenus which in turn may contain submenus. To open a menu, select the menu using the Up or Down Arrow key ( ) and press ENTER. Display Description One menu item at a time appears in the 16-character ßuorescent display. EFS 100 PERCENT CONFIGURATION MONITOR TEST what you see For example, when you open the CONFIGURATION menu, the UNIT CONFIG, a submenu appears. To see another submenu, select it using the Up or Down Arrow key and Return.
Front Panel Keys The system always indicates at the bottom of the status display what you can do immediately.
Editing a Parameter To modify a parameter such as the unit ID: 1 Press ENTER to open the CONFIGURATION MENU. The UNIT CONFIG submenu appears. 2 Press ENTER to open this menu and ENTER again to activate edit mode (the Þrst ID character starts to blink). UNIT CONFIG ENTER UNIT ID HARRY ENTER First character starts to blink UNIT ID HARRY 3 Edit the ID one character at a time.
Preparing for the Initial ConÞguration Before you start an initial conÞguration, you need the required information ready and should establish a method of record keeping. Required Information Collect the following information: ¥ The DL600E IP address and IP subnet mask for establishing a Telnet connection to the DL600E unit from a remote terminal and enabling SNMP network management capability.
ConÞguring the Unit and Network Parameters Use the UNIT CONFIG and NET CONFIG menus in the CONFIGURATION menu to conÞgure the unit and network parameters, respectively. To open the CONFIGURATION menu, use the Up or Down Arrows to move to the menu and press ENTER. The UNIT CONFIG submenu appears. The CONFIGURATION submenus are shown below.
The UNIT CONFIG Submenu The items in the UNIT CONFIG menu are shown below. UNIT CONFIG ENTER UNIT ID HARRY NOV,12,95 10,46,58 COMM PORT CONF TEST LENGTH ÐÐÐ HW REV D read-only SW REV 2.5 Use the Up or Down Arrows to move from item to item. To activate edit mode, press ENTER. For information about the UNIT CONFIG items, refer to Menu-4 Main ConÞguration in Chapter 3. UNIT ID and Date and Time Edit each item one character at a time. To move to the next character, press ENTER.
The Comm Port Settings The Comm Port parameters are: BAUD RATE, PARITY, WORD LENGTH, STOP BITS, ENABLE DCD, and XOFF UNTIL. The front panel displays one parameter and its current value. To view and modify the Comm Port settings, follow the procedure in the example below: 1 From the CONFIGURATION menu, press ENTER to move down to the UNIT CONFIG menu. 2 Press ENTER to open the UNIT CONFIG menu.
The NET CONFIG Menu The NET CONFIG menu contains the following items: NET CONFIG ENTER NET CRC ENABLE/DISABLE NET IMP 75O HMS/120 OHMS NET TIMING IN-BAND BIT 4/5/6/7/8/DIS LPCODE STNDRD FLPCODE STNDRD For a description of these items, refer to Menu-4 Main ConÞguration on in Chapter 3.
2 Set the external clock rate in the EXT CLK submenu.
Cycle through the options (EXT, INT, NET, DATA 4, DATA 3, DATA 2, DATA 1, AUX) using the Up or Down Arrows and press ENTER when you come to EXT. Press ENTER to conÞrm your action when the prompt appears. 3 Move to BKUP CLK INT and set the backup clock the same way you set the main clock. 4 Move to EXT CLK and select a frequency for the external clock. Enabling NET IBC You can enable IBC only by using the In-Band Bit setting in the Network ConÞg menu.
ConÞguring the Data Ports Use DATA 1 CONFIG, DATA 2 CONFIG, DATA 3 CONFIG, and so on to conÞgure data ports. Refer to ÒConÞguring the Data PortsÓ in Chapter 3 for a description of the parameters. To conÞgure the data ports: 1 From the CONFIGURATION menu, press ENTER and open DATA 1 CONFIG using the Up or Down Arrows and ENTER. DATA 1 NORMAL appears. (NORMAL is the default code.) 2 Press the Down Arrow to move to the next parameter, LOS. DATA 1 LOS,RTS appears. RTS is the default LOS parameter.
Displaying the Timeslot Allocation To display the timeslot allocation for each port: 1 Press ENTER to open the CONFIGURATION menu and move to TIMESLOT CONFIG using the Up or Down Arrows, then press ENTER to open. A submenu appears, such as TS CONF CONTIG. TIMESLOT CONFIG ENTER TS CONF CONTIG 2 To see the timeslot allocation for port 1, press the Up Arrow. To see the allocation for port 2, press the Up Arrow again. Repeat for the other ports (if you have them).
Changing the Allocation for Occupied Slots When you try to allocate an occupied slot to another port from the front panel interface, an error message appears. You must Þrst make a slot idle to allocate it to another port. (This restriction is present only on the front panel interface.) Allocating Timeslots Contiguously Example This example shows how to allocate timeslots 16 through 31 to data port 2. You are in default modeÑall slots allocated to port 1.
The timeslot allocation for port 1 appears: DTE01 TS = 01 -- 15 4 To allocate slots to port 2: DTE02 IDLE Ñ Move to port 2 by pressing the Up Arrow: Ñ Press ENTER to activate edit mode. Ñ Press the Up Arrow (the start timeslot, 01, starts to blink). Ñ Press the Up Arrow to move to slot 16 and press ENTER to select it and move to the end timeslot. Ñ Press the Up Arrow to reach 31 and press ENTER.
2 To select a network timeslot: Ñ Go to TS CONFIG NET by pressing the Up or Down Arrow. TS CONFIG NET You can now select a network timeslot and allocate it. Ñ Press ENTER to display the slot 1 status. NET TS01 DATA01 Ñ Press Up Arrow to open the display for network timeslot 2. NET TS02 DATA01 Ñ Press the Up Arrow to move to IDLE and press ENTER then ENTER again to conÞrm the change. Ñ For timeslot 5, press ENTER to open the display and ENTER again to activate edit mode for the port.
Using the MONITOR Menu Use the MONITOR menu to display network status, DTE status and the network error counter. EFS 100 PERCENT MONITOR TEST CONFIGURATION The 24 hour line data is only available with the terminal interface or through the Network Manager. The data in the monitor menu is a subset of the parameters available on the terminal interface or through the Network Manager. Both the Monitor and ConÞguration Menus can also access the remote unit.
For more information about monitoring the DL600E unit, refer to ÒMenu-1 Main Status ParametersÓ in Chapter 4. Using the TEST Menu You can perform the Self-Test, activate network loopbacks, test modes, and DTE loopbacks on the local DL600E unit from the front panel TEST menu. EFS 100 PERCENT MONITOR TEST CONFIGURATION D Note: The TEST menu does not appear on the front panel display if the front panel is protected in Menu-4 Main ConÞguration (UNIT Protect mode is enabled).
The test continues running until you end it. TEST ENTER SELF TEST (OK) LOOP DTE LOOP NET LOOP PAYLOAD LPUP REMOTE TEST PATTERN LPDN REMOTE LAMP TEST 2 To end the test, press and ENTER. END TEST The name of the terminated test appears in the TEST menu. During a Test During a test, observe the following: ¥ The TEST LED on the front panel turns green, indicating the DL600E unit is out of service during the test. ¥ The name of the current test appears on the display with a plus (+) at the end.
Running a Full Bandwidth or Fractional LOOP DTE Select LOOP DTE and press ENTER to open the sub-menu. LOOP DTE (FULL) appears. To start a full bandwidth test, press ENTER. When the system prompts press ENTER again. LOOP DTE ENTER LOOP DTE (FULL) ENTER Sending a Test Pattern The DL600E unit can also send test patterns to the network port. These patterns can be sent over the full bandwidth or over only a fraction of the bandwidth.
3 Cycle through the full bandwidth patterns using the Up or Down Arrow and press ENTER to select the pattern and start the test. Press ENTER again when the system prompts to conÞrm. The patterns are listed on page 5-24. 4 The DL600E unit starts sending the selected pattern and tries to lock on to the same pattern coming back from the remote unit. The message PATTRN SEARCHING appears. The test changes the DATA/TEST LED from green to red to indicate a test is being performed on the port.
Pattern Options TEST PATTERN ENTER TEST PTRN (FULL) TEST PTRN (P1) TEST PTRN (P2) TEST PTRN (P3) ENTER QRW (FULL) 1 : 7 (FULL) 3,24 (FULL) 1 : 1 (FULL) 1 ' S (FULL) 0 ' S (FULL) 1 : 2 (FULL) 1 : 4 (FULL) USER1 (FULL) USER2 (FULL) Running TEST PATTERN on a Fraction of the Bandwidth To run TEST PATTERN on a fraction of the bandwidth: 1 Select TEST PATTERN and press ENTER to open the menu.
3 Use the Up or Down Arrow to cycle through the available patterns. (Refer to ÒPattern OptionsÓ on page 5-24.) Select the pattern and start the test by pressing ENTER and ENTER again when the system prompts you to conÞrm. 4 The DL600E unit starts sending the selected pattern over a fraction of the bandwidth and at the same time tries to lock on to the same pattern coming back from the remote unit. The message PATTRN SEARCHING appears.
5-26 DL600E E1 Data Multiplexer UserÕs Guide
6 Diagnosing the DL600E Unit ¥ Running Diagnostic Tests 6-2 ¥ The Diagnostics Menu 6-3 ¥ Test Parameters 6-4 ¥ Test Types 6-6 ¥ Running Tests from the Front Panel 6-10
Running Diagnostic Tests To verify the connections and E1 line, run the following basic diagnostic and pattern tests from Menu-9 Diagnostics: ¥ Loop DTE test ¥ Loop NET test ¥ Loop Local AUX E1 ¥ Loop Payload test ¥ Loop Up Remote test ¥ Loop Down Remote test ¥ Various Pattern tests You can also run these tests from the front panel. Refer to ÒUsing the TEST MenuÓ in Chapter 5 for further information. Refer to Chapter 3 for further information about connecting a terminal to the DL600E unit.
The Diagnostics Menu When running a test, you can: ¥ Initiate loopbacks and tests on the full bandwidth or on the data port fraction ¥ Set programmable test patterns Figure Figure 6-1 shows an example of Menu-9 Diagnostics. SW Ver 2.0 MIB Ver 1.
Running a Test from Menu-9 Diagnostics To run a test from Menu-9 Diagnostics, select the test in the Test Þeld, set the Test length, and follow the screen prompts. The test results are displayed in the upper half of the screen. In the example in Figure Figure 6-1 the selected test, Loop Payload, is highlighted. The selections for fractions on which the test is performed are Full Bandwidth, and DATA01. Fraction is ignored with the Self Test, Network Loopback or Lamp Test.
Enter any sequence of 1s and 0s, between 1 and 24 characters in length.
Test Types Self Test The Self Test checks the systemÕs electronic components and performs a signal path check of the transmit and receive directions utilizing a simulated 4000 foot (1220 meter) E1 line. The test feeds a QRW test pattern to the transmitter circuit, passes it through a simulated E1 line back into the receiver, then feeds the test pattern to the pattern detector circuit. When the code is successfully detected, the NET LED turns on and the Power/Self Test LED turns green.
You can perform the Loop DTE only if the DTE equipment has a feature to send and detect a test pattern. The DTE equipment sends the full bandwidth signal through a 4000 foot (1220 meter) simulated line to the DL600 E1 network receive circuitry. It should receive the same signal it transmitted. The E1 network transmitter continues to transmit toward the network while the DL600E unit is in DTE loopback. E1 transmission is interrupted during the test.
Loop Payload Test The Loop Payload test veriÞes proper operation of the DL600E unit and the E1 network. It loops the payload data received from the E1 network back toward the network. Before it is looped back, the data is regenerated and a new framing pattern is inserted. Thus, the proper E1 framing of the DL600E unit and network can be veriÞed. The individual channel Loop Payload loops a selected ÒfractionÓ of the E1 signal toward the network.
To run the Loop Up and Loop Down Remote tests from the front panel, press the REMOTE LPBK UP and DOWN buttons, respectively. . DTE Local Solo E1 Encore Network Interface DATA Port DSU Figure 6-5 Remote Solo E1 Encore Network Interface DATA Port DSU Loop Up Remote Test QRW Pattern Test Use the Quasi-Random Word (QRW) test to measure Bit Error Rates on the E1 network. The DL600E unit sends a QRW pattern into the network and monitors the received E1 network signal for QRW bit errors.
Send 1:4 Test (or Alternate) The 1:4 code is the standard loop up remote code. It is typically used to put the remote system into loopback. You can determine if the failure is an intermittent or a hard failure by continuously sending the 1:4 code, and monitoring the network status to see if the pattern is being received. The selections are available on the full bandwidth and on Data Port 1. The full bandwidth code puts the remote system into full network loopback.
Appendix DL600E Technical SpeciÞcations A
Technical SpeciÞcations E1 Electrical Network Interface Transmit line rate Receive line rate Line code Framing Input signal Output signal Electrical Impedance 2.048Mb/s ±50ppm 2.048Mb/s ±75ppm HDB3 ITU-TS G.704 0 to 20 dB ITU-TS G.703 ITU-TS G.703 75W (BNC) unbalanced or 120W (DA-15) balanced E1 AUX Interface (optional) Transmit line rate Receive line rate Line code Data Rates Framing Input signal Impedance Interference immunity 2.048Mb/s ±50ppm 2.048Mb/s ±75ppm HDB3 Nx64kbps (n=1 through 31) ITU-TS G.
Front Panel Display Key Pad LEDs (per data port) Status Bantam Jacks 16 character alphanumeric 4 keys TD, RD, CTS, RTS, DTR, DATA/TEST Network Port, E1 Port, Test E1 Send (IN/MON), E1 Receive (MON) Power Options AC Input Voltage DC Input Voltage Power Consumption 120 to 220 VAC, 50 to 60Hz -48VDC (optional) 10W maximum Physical Dimensions 43.2cm W x 30.5cm D x 4.37cm H (17"W x 12" D x 1.
Terminal Supported ANSI (VT100) compatible terminal user interface supported Equipment Grounding Conductor The equipment grounding conductor or cable is connected to ground at the service equipment. It should be installed as part of the circuit supplying the system and should not be smaller in size than the ungrounded branch-circuit supply conductors. A bare, covered or insulated grounding conductor is acceptable.
RD Solid green Off Pulses to DTE detected No pulses to DTE detected RTS Yellow Off Receive to send line (RTS) from DTE is asserted Receive to send line removed CTS Yellow Off Clear to send line (CTS) to DTE is active Clear to send line removed, indicating unit is not sending valid data DTR Yellow Off Data terminal ready line (DTR) from DTE is active Data terminal ready line from DTE is inactive Off Bandwidth not allocated DATA/TEST (Port in normal or test modes) NET Loopback Green Full Bandw
EXIT Button EXIT End operation or to higher level menu loop from a sub-menu loop LEFT ARROW LEFT ARROW Button in a few situations ERROR FREE SECONDS Successive pressing of the EXIT Button brings the user to the Error Free Seconds display END TEST Buttons UP ARROW Move up to previous menu or option DOWN ARROW Move down to previous menu or option Pressing both buttons simultaneously to END TEST Terminates all tests on local unit and brings the front panel menu to the Test Menu showing test just termi
Factory Default ConÞguration The DL600E factory default settings are listed below. Unit ConÞguration Unit ID Network ConÞguration CRC4 Main Synch. Source Data Port ConÞguration Loss Mode Timeslot Allocation Allocation Type Unique ID assigned Enabled Network DTR DCE Contiguous Protect Mode Disabled In-Band Communications Bit Alternate Synch Source Internal Format Clock X.
ConÞguration Worksheet Use this worksheet to keep a written record of your conÞguration. Unit ConÞguration Unit ID .................................... Protect Mode .................................... .................................... .................................... .................................... Line Impedance Alternate Synch. Source .................................... .................................... .................................... .................................... .....
DL600E Model Numbers Table A-2 shows the model numbers of the equipment supplied to you by Digital Link.
A-10 DL600E E1 Data Multiplexer UserÕs Guide
Appendix Connector and Pin Assignments B
E1 Network Pin Assignments The pin assignments for the DB15 network interface connector are listed in Table B-1 below. Table B-1 Network Interface Pin Assignments Pin Signal Send toward Network Tip (T1) Send toward Network Ring (R1) NC Receive from Network Tip (T) Receive from Network Ring (R) NC 1 9 2 3 11 4 NC 5, 6, 7, 8, 10, 12,13,14,15 The AUX (E1) DTE Interface pin assignments for the 15-pin, female, sub-miniature-D connector with lock-posts are listed in Table B-2 below.
DL600E-to-Equipment Pin Assignments The pin assignments for DL600E unit to Equipment in Table B-3. Table B-3 Name Serial Clock Transmit DL600E to Equipment Pin Assignments V.35 EIA-530 SCT -A, B (Y, AA) SCT -A, B (Y, AA) X.21 RS449 SCT -A, B (Y, AA) Description Clock for SD. SD changes on positive transition of SCT (A) SCT(B) Serial Clock Receive SCT -A, B (V, XX) RT -A, B (17, 9) Signal Element Timing (6, 13) RT -A, B (8, 26) Clock for RD.
The pin assignments for Equipment to DL600E unit in Table B-4. Table B-4 Name Equipment to DL600E Pin Assignments V.35 Send Data EIA-530 X.21 Description SD A, B (4, 22) Data stream from DTE to network RT A, B (12, 30) Can be used to indicate loss of DTE signal.a RS A, B (7, 25) Affects assertion of CTS and sending of Blue Alarm. See diagrams. See note 2.
DB25-to-DC-37 (RS449) DTE Connector Pin Assignments The pin assignments for the DB25-to-DC-37 (RS449) data port connector are listed below in Table B-5.
DB25-to-M-34 (V.35) DCE Connector Pin Assignments The pin assignments for the DB25 to V.35 DCE connector are listed below in Table B-6. Table B-6 DB25 to V.
DB25-to-DC-37 (RS449) DCE Connector Pin Assignments Table B-7 describes the DB25-to-DC-37 (RS449) DCE connector pin assignments.
Communication Port Pin Assignments Table B-8 describes the Comm Port pin assignments. Table B-8 Communication Port Pin (DE9) Assignments Pin Signal 1 DCD Carrier Detect 2 3 4 5 SD Send Data (from DL600E to terminal) Receive Data (from terminal to DSU) No connection Signal Ground (bi-directional) No connection 6 8 8a 9 RD SG CTS No connection Clear To Send (I/O to all DSUs only) No connection a. CTS is used by the DL600E unit as a collision avoidance line.
DE9-to-DB25 Adapter Pin Assignments Digital Link provides a DB9-to-DB25 adapter for the Digital Link DE9 Comm Port ribbon cable. The pinout assignments for the adapters are listed below in Table B-10. Table B-10 DE9-to-DB25 Adapter Pinouts DB9 DB25 3 2 3 4 5 6 7 8 23 21 2 7 8 6 5 1 9s 4 DB25-to-DE9 Adapter Pin Assignments Digital Link provides an adapter to accommodate the Digital Link DE9 Comm Port ribbon cable for the DB25 connector on the terminal port.
B-10 DL600E E1 Data Multiplexer UserÕs Guide
Glossary A All 1sÑAll Ones simulates the highest spectral components and highest energy out of the product and out of the line repeaters on the E1 line. All 0sÑA pattern that checks the correct operation of the HDB3 (E1) line cod- ing. This code is meant to allow a pattern with many 0 bits to go through the line transparently. attenuation ÑReduction or loss of signal strength, measured in decibels; opposite of gain.
circuit ÑGenerally referring to a transmission medium connecting two or more electronic devices. clear channel ÑA 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.
D data link ÑA serial data communication transmission path, generally between two adjacent nodes or devices and without intermediate switching nodes. data link layer ÑIn the OSI model, the network processing entity that estab- lishes, maintains and releases data link connections between adjacent elements in the network.
DSR (Data Set Ready) ÑA data port signal. DSU Loopback Ñ 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. DSX-1 (Digital Signal Cross Connect Level 1) ÑParameters set used when DS1 signals are cross connected.
equalization ÑThe spacing and operation of ampliÞers so that the gain pro- vided 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. F far end ÑThe unit or units remote from the user. FE (Framing Errors) ÑOccurs when the end of a frame is not detected where it should be. FG (Frame Ground) ÑA signal from DTE to DSU/CSU.
H HDB3 (High Density Bipolar 3) Ñ A bipolar coding method that does not allow more than 3 consecutive zeroes. A T1 carrier standard, like D4, ESF. I impedance ÑResistance to the ßow of alternating current in a circuit. A DSU/CSU is used to amplify and match impedance or match/balance net- work signaling to the customer's equipment IP address ÑA unique, 32-bit identiÞer for a TCP/IP host on a network.
multidrop ÑA communications arrangement where multiple devices share a common transmission channel, though only one may transmit at a time. N NI (Network Interface) ÑThe 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. P parity bit ÑAn additional, non-informational bit appended to a group of bits indicating that the number of ÒonesÓ in the bits group is odd or even.
repeater ÑEquipment that receives a pulse train, ampliÞes it, retimes it, and then reconstructs the signal for retransmission. return to zero ÑMethod of transmitting binary information such that, after each encode bit, voltage returns to the zero level. RI (Ring Indicator) ÑA data port signal. RJ48S ÑAn 8-position keyed jack used to connect services that are covered under FCC Part 68 Rules, such as public switched digital service (PSDS), switched 56, 19.
scrambler ÑA device or software program that encodes data for encryption. It distorts a voice or data conversation so that only another like device can Þgure out the content of the message. SD (Send Data) ÑA signal from DTE to DSU/CSU. secondary channel ÑA subchannel derived from the main channel. It does not carry data messages and is used for diagnostic or supervisory purposes. serial interfaceÑData channel that transfers digital data in a serial fashion: one bit after the other.
socket ÑA female connector designed to receive a male connector or plug. stop bit ÑThe last transmitted element in each character, which permits the receiver to come to an idle condition before accepting another character. synchronous transmission ÑThe transmission of data in which both stations are synchronized. Codes are sent from the transmitting station to the receiving station to establish the synchronization, and data is then transmitted in continuous streams.
U UA1 (Unframed All 1s) ÑWhen the DSU loses its signal from the DTE device, it generates a NET UA1 Received Alarm to the E1 network. V V.35 ÑA 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 ÑTerminal emulation standard. CCITT standard (1976) for various loop- back tests that can be incorporated into modems for testing the telephone circuit and isolating transmission problems.
G-12 DL600E E1 Data Multiplexer UserÕs Guide
Index A AC power supply 2-4 access rights 3-23 adapters pin assignments B-9 alarms 1-5 configuring 3-25, 3-30 Menu-8 Alarm II 3-28 allocating timeslots 3-17 AMI T1 line code format 1-4 ANSI FDL Protocol 3-16 B B8ZS T1 line code format 3-10 testing 6-9 bandwidth allocating timeslots 1-4 baud rate on modem 3-4 on terminal 3-2 on terminal or modem B-8 BER (Bit Error Rates) QRW Pattern test 6-9 Bipolar Violations Menu-9 Diagnostics 6-3 bridge taps testing for 6-9 C carrier loss network carrier loss alarm 3-26
F FE events threshold alarm 3-27 features Solo Encore 1-4 framing Menu-4 Main ConÞguration 3-10 front panel interface 5-2 CONFIGURATION menu 5-8 DATA x CONFIG menu 5-14 how to navigate 5-3 keys 5-5 MONITOR menu 5-19 SNMP CONFIG menu 5-18 TEST menu 5-20 TIMESLOT CONFIG menu 5-14 menus Menu-0 SNMP ConÞg.
S Self Test at power-up 2-4, 2-6 running 6-6 simplex power handling with caution 2-2 smooth clock on data port 1-4 SNMP conÞguring 3-10, 3-21 Menu-0 SNMP ConÞg.
