JULY 1998 MT136A MT137C MT138C MT139C MT140C CSU/DSU MS DBU BU SD UM /DS CSU C 3 B F 2 A 6 E 1 5 9 D R NTE E 4 ICK QU 8 # 7 T SHIF * 0 CEL CAN TST RD RS CUSTOMER SUPPORT INFORMATION CS CD ALM TD Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.
TRADEMARKS TRADEMARKS USED IN THIS MANUAL Accunet and AT&T are registered trademarks of American Telephone and Telegraph Company. VT100 is a trademark of Digital Equipment Corporation. HP and OpenView are registered trademarks of Hewlett-Packard. IBM and NetView are registered trademarks of International Business Machines Coporation. MCI is a registered trademark of MCI Telecommunications Corporation. MNP is a registered trademark of Microcom Systems, Inc.
CSU/DSU MS DBU FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication.
NOM STATEMENT NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5.
CSU/DSU MS DBU 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato. 14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante. 15.
ABOUT THIS MANUAL About This Manual This manual is arranged so you can quickly and easily find the information you need. The following is an overview of the contents of this manual: • Chapter 1, Introduction, familiarizes you with DDS, Switched 56, SNMP, and TELNET. This chapter also includes CSU/DSU MS DBU highlights and describes the options that may be purchased for use with the DSU.
CSU/DSU MS DBU • Appendix E contains a DSU-to-modem interconnect diagram for a modem tailcircuit application. • Appendix F contains product specifications.
FCC REGULATIONS FCC regulations require that the following information be provided in this manual: 1. This equipment complies with Part 68 of the FCC rules. On the bottom of the equipment housing is a label that shows the FCC registration number and ringer equivalence number (REN) for this equipment. If requested, provide this information to the telephone company. 2. If this equipment causes harm to the telephone network, the telephone company may temporarily discontinue service.
CSU/DSU MS DBU 8. The following information may be required when applying to the local telephone company for a dial-up line for the V.34 Module: Service Type SOC REN FIC USOC Loop Start (V.34) 9.0Y 0.8B 02LS2 RJ-11C 9. The following information may be required when applying to the local telephone company for Switched 56 service for the S4W DBU Card: Service Type SOC REN FIC USOC PSDS 6.0F N/A 04D45-56B RJ-48S 10.
ISDN SERVICE ORDERING INFORMATION ISDN Service Ordering Information for the CSU/DSU MS DBU With ISDN Dial Backup For CSU/DSU MS DBU ISDN applications, the following guide can be used as an aid in ordering basic ISDN service from your local telephone company. The CSU/DSU MS DBU ISDN includes NT1 and terminal-adapter functionality and supports data rates up to 64 kbps.
CSU/DSU MS DBU TURN THE FOLLOWING FEATURES OFF: Packet Mode Data Multi-line Hunt Multiple Call Appearances Electronic Key Telephone Sets (EKTS) Shared Dictionary Numbers Accept Special Type of Number Intercom Groups Network Resource Selector (Modem Pools) Message Waiting Hunting InterLata Competition FOR SERVICE OFFERED FROM A NORTHERN TELECOM DMS-100, REQUEST A POINT-TO-POINT MULTI-POINT LINE WITH THE FOLLOWING FEATURES: Line Type: Basic Rate, Functional Electronic Key Telephone Sets (EKTS): No Call Appear
CONTENTS Contents Chapter Page 1. Introduction........................................................................................................15 1.1 Overview ....................................................................................................15 1.2 DDS Operation ........................................................................................16 1.3 Switched 56 Operation ............................................................................16 1.4 SNMP .................
CSU/DSU MS DBU Chapter Page 7.5 Transmit Clock..........................................................................................49 7.6 Clear to Send (CS) Options ....................................................................49 7.7 Anti-Stream................................................................................................50 7.8 CD Options................................................................................................50 7.9 Data Terminal Ready (TR) Options......
CONTENTS Chapter Page 11. Configuring Unit Utilities ..................................................................................68 11.1 Manual Command ....................................................................................69 11.2 Time/Date ................................................................................................70 11.3 Software Revision ......................................................................................71 11.4 LAN MAC Address...................
CSU/DSU MS DBU Chapter Page Appendix C. Terminal Menu Structure ................................................................98 C.1 Status Messages ......................................................................................102 C.2 Local/Remote Configuration Menus....................................................102 C.2.1 DSU Configuration (DTE, Network, and Test Options) ............103 C.2.2 DBU Configuration ......................................................................103 C.2.
CHAPTER 1: Introduction 1. Introduction 1.1 Overview The CSU/DSU MS DBU (data service unit with embedded SNMP) provides a reliable, high-speed data connection for customer data terminal equipment through digital data service (DDS) lines. The CSU/DSU MS DBU has an embedded SNMP agent that provides complete SNMP access to the unit through an integral SLIP or PPP async port. The CSU/DSU MS DBU’s unique modular approach provides optional 10BASE-T Ethernet access for SNMP.
CSU/DSU MS DBU Modem Module allows switched backup over the public switched telephone network (PSTN). The ISDN Module is compatible with National ISDN and supports a U-interface to the Basic Rate ISDN. 1.2 DDS Operation DDS is a nationwide service that allows interconnection and transport of data at speeds up to 64 kbps. The local exchange carriers provide the local loop service to DDS customers and may provide data for routing Inter-LATA to an interexchange carrier.
CHAPTER 1: Introduction MIB Index to the organized data within a network device. It defines the operation parameters that can be controlled or monitored. The CSU/DSU MS DBU supports the MIB-II standard, RFC 1213, and Black Box Enterprise Specific MIB. MIB files are available from Black Box in the support section of the Black Box Web page at www.blackbox.com.
CSU/DSU MS DBU V.34 MODULE The V.34 card has all of a V.32 bis modem’s modes of operation, plus V.34 and V.FC modes. This allows the V.34 option to run synchronous rates up to 33.6 kbps, as opposed to the V.32 maximum of 14.4 kbps. In asynchronous mode the throughput at 57.6 kbps is less dependent on data types. ISDN MODULE 1B+D Basic Rate ISDN service provides the customer with a switched 56/64 kbps circuit.
CHAPTER 2: Installation 2. Installation 2.1 Unpack, Inspect, Power Up INSPECTION Carefully inspect the CSU/DSU MS DBU for any shipping damage. If damage is suspected, file a claim immediately with the carrier and contact Black Box Customer Service. Keep the original shipping container for use in shipping the CSU/DSU MS DBU for repair or for verification of damage during shipment.
CSU/DSU MS DBU in the CSU/DSU MS DBU). See Appendix A for the pin assignments of the control port (for SLIP and Async PPP) and the Ethernet port. POWER UP The CSU/DSU MS DBU is provided with a captive 8-foot power cord, terminated by a three-prong plug that connects to a grounded 115-VAC power receptacle. CAUTION Power to the DSU must be provided from a grounded 115-VAC, 60-Hz receptacle. 2.2 Rear Panel The rear panel contains two DTE connectors that provide primary-channel V.35 or EIA-232.
CHAPTER 2: Installation S4W, V.34, or ISDN DBU Card DDS 10BASET LAN Card DBU INTERFACE LAN INTERFACE 10 BASE T LAN ISDN DBU 115 VAC 60HZ.15A V .35 TELCO EIA-232 CONTROL ON 4-wire Telco Cable EIA232 Cable OFF RJ45-to-DB25 Cable V.35 Cable DTE Device VT 100 Terminal or device running SLIP or async PPP protocol Bridge/Router DTE Device Figure 2-1. Rear View. Item DBU Interface LAN Interface Telco EIA-232 Control V.
CSU/DSU MS DBU DBU AND ETHERNET CARD SLOTS CAUTION Remove power from the unit prior to installing or removing modules. The CSU/DSU MS DBU rear panel has two card slots for the installation of dialbackup and Ethernet cards. To insert cards: 1. Remove power from the CSU/DSU MS DBU. 2. Slide the card into the corresponding rear slot until the card panel is flush with the CSU/DSU MS DBU chassis. 3. Push card locks in (until they click) to secure the card and ensure proper installation.
CHAPTER 2: Installation CAUTION To prevent possible radio-frequency interference emissions, a shielded cable is required. CONTROL PORT The CSU/DSU MS DBU has an 8-position modular jack labeled CONTROL. The control port provides connection to a VT100 EIA-232 compatible interface, a device running SLIP protocol, or a device running Async PPP protocol. An 8-foot adapter connector and cable provide a standard DB25 EIA-232 interface. See Appendix A for the control port’s pin assignments.
CSU/DSU MS DBU 3. Operation The CSU/DSU MS DBU is shown in Figure 3-1. Descriptions of each part of the front panel follow. CSU/DSU MS DBU ENTER RS CS TD RD CD ALM TST A B C 1 2 3 D E F 4 5 6 7 8 CANCEL * 9 QUICK SHIFT 0 # Figure 3-1. Front Panel. LCD WINDOWS Displays menu items and messages in 2 lines by 16 characters. ENTER Selects active menu items. To select a menu item, press the number of the item. The menu item flashes, indicating it is activated.
CHAPTER 3: Operation CANCEL Pressing the Cancel key stops the current activity and returns to the previous menu. Repeat until the desired menu level is reached. When a submenu item is displayed, press Cancel to exit the current display and return to the previous menu. UP AND DOWN ARROWS Up and Down Arrows scroll through the submenu items available in the current menu. LED DESCRIPTIONS The CSU/DSU MS DBU has seven LED indicators: RS, CS, TD, RD, CD, ALM, and TST.
CSU/DSU MS DBU FRONT-PANEL MENU NAVIGATION To choose a menu item, press the corresponding number or letter on the keypad. Press Shift to activate menu items with alpha selections. The flashing menu item indicates which selection is activated. Press Enter to select the item. The following steps and Figure 3-2 illustrate how to select CSU/DSU MS DBU options: 1. Activate Configuration (CONFIG) by pressing 3. The activated menu item will flash. Press Enter. 2.
CHAPTER 3: Operation Front-panel LCD display of the Main menu: 1=STATUS 2=TEST 3=CONFIG 4=DIAL NOTE The Dial selection in the Main menu is only available when a SW56 network type is selected or when a DBU card is installed in the rear of the CSU/DSU MS DBU. MAIN MENU The branches of the front-panel Main menu are divided into options for Status, Test, Configuration (CONFIG), and Dial. Status Status menus display all relevant information for the network and DTE interfaces.
CSU/DSU MS DBU VT100 Terminal Connection and Operation To control the CSU/DSU MS DBU using a VT100 terminal: 1. Select a terminal interface through the front panel. Select 3 CONFIG, 5 MANAGEMENT, 1 INTERFACE, 1 TERM CONTROL. 2. Set the CONTROL RATE to match the VT100 terminal. 3. Using the provided VT100 terminal adapter cable, connect the COM port of a VT100 compatible terminal or equivalent to the eight-pin modular jack labeled CONTROL on the rear of the CSU/DSU MS DBU.
CHAPTER 3: Operation TERMINAL MENU 1 2 4 5 6 STATUS LOCAL CONFIG LOCAL TEST REMOTE TEST DIAL SW56 ESC = EXIT ENTER SELECTION -> Figure 3-3. Terminal Interface Main Menu (SW56 Mode).
CSU/DSU MS DBU 4. Applications This chapter provides examples of some common CSU/DSU MS DBU applications. The examples include LAN applications with both SLIP/PPP and Ethernet management and a dial-backup application. 4.1 LAN Application with SNMP/TELNET Management The CSU/DSU MS DBU can be managed through an established TELNET session or an SNMP-based network manager like HP® OpenView®, IBM® NetView®, or SunNet Manager.
CHAPTER 4: Applications SNMP Management Station DDS or Frame Relay LAN SLIP/PPP LAN SLIP/PPP Router Router EIA 232 or V.35 CSU/DSU MS DBU CSU/DSU MS DBU EIA 232 or V.35 Figure 4-1. SLIP/PPP LAN Application with SNMP/TELNET Management. SNMP Management Station Ethernet LAN DDS or Frame Relay Ethernet LAN Router Router EIA 232 or V.35 CSU/DSU MS DBU EIA 232 or V.35 CSU/DSU MS DBU Figure 4-2. Ethernet LAN Application with SNMP/TELNET Management.
CSU/DSU MS DBU MINIMUM CONFIGURATION REQUIREMENTS FOR SNMP/TELNET ACCESS The following options are the minimum configuration requirements for establishing SNMP or TELNET access. Once these options are configured, the remaining options may be configured using SNMP/TELNET. See the menu tree in Figure 10-1 in Chapter 10 for the front-panel menu path to these options. Interface Select SLIP Control, PPP Control, or Ethernet LAN as the CSU/DSU MS DBU interface type.
CHAPTER 4: Applications 4.2 Dial-Backup Application The CSU/DSU MS DBU provides point-to-point connection to the network. With one of the DBU module cards installed, the unit is capable of dial backup, allowing the unit to dial around a failed network. See Figure 4-3. With the DBU options, you can configure the unit to: • Enter DBU under specific primary network conditions. • Lock out DBU over the weekend and/or at specified times of the day.
CSU/DSU MS DBU OPERATION DURING CRITICAL TIMES The following four conditions will cause a CSU/DSU MS DBU to enter dial-backup mode: Loss of Sealing Current Sealing current is a low-voltage DC current provided by the central office (CO) to prevent corrosion over the copper wires used in the local loop. Sealing current may also be used for local-loop testing purposes. An absence of sealing current generally is an indication that the loop is open.
CHAPTER 4: Applications Weekend and Time of Day Lockout The CSU/DSU MS DBU may be configured not to enter dial-backup mode at certain times of day or on weekends. This protects the customer from being charged for a switched call during off hours should the dedicated circuit fail. See Chapter 9 for more information. CONDITIONS FOR RETURNING TO THE DDS CIRCUIT The CSU/DSU MS DBU can be configured to automatically revert to the DDS circuit from the dial-backup mode or wait to be returned to the DDS manually.
CSU/DSU MS DBU 5. Configuration Overview The CSU/DSU MS DBU contains four different user profiles (sets of configuration options) stored in read-only memory; see Appendix D. The unit is shipped from the factory with profile number 1 (default configuration) loaded into the current (nonvolatile configuration) memory. If profile 1 matches requirements for the system, then no additional configuration is required to put the unit into service.
CHAPTER 5: Configuration Overview NOTE Because a VT100 terminal has better display capabilities, the VT100 menu structure differs from the front-panel interface. Appendix C includes the VT100 screens as well as a complete menu tree for accessing configuration selections. Descriptions of individual menu options are provided throughout this manual based on the front-panel menu structure. See Figure 5-1 for the front-panel configuration menu tree.
CSU/DSU MS DBU 1=LOOP RATE 1=NETWORK OPT. 1=AUTO 2=2.4K 3=4.8K 4=9.6K 5=19.2K 6=38.4K 7=56K 8=64K 2=NETWORK ADDR. ENTER NETWORK ADDRESS:00 3=REMOTE CONFIG. 1=DISABLED 2=ENABLED 4=NETWORK TYPE 1=DEDICATED 2=AT&T/MCI SW56 3=US SPRINT SW56 5=CLOCK SOURCE 1=MASTER 2=FROM NETWORK 2=DTE OPTIONS 1=TEST TIMOUT 2-RDL EN/DIS 1=RDL IGNORED 2=RDL ACCEPTED 3=EIA LLB EN/DIS 1=DISABLED 2=ENABLED 4=EIA RLB EN/DIS 1=DISABLED 2=ENABLED 5=DBU ANS.
CHAPTER 5: Configuration Overview 1=2.4K 2=4.8K 3=9.6K 4=19.2K 5=38.4K 6=56K/57.6K 7=SAME AS LOOP 1=DTE RATE 1=SCRAMBLER OFF 2=SCRAMBLER ON 3=SUPPRESS LBE 1=EIA 232 2=V.35 2=CONNECTOR TYPE 3=DATA FORMAT 1=ASYNCHRONOUS 2=SYNCHRONOUS 1=ASYNC 9 BITS 2=ASYNC 10 BITS 3=ASYNC 11 BITS 1=DISABLED 2=AT COMMAND SET 3=V.25 SYNC 4=V.25 BSC/ASYNC 4=DTE CMD OPTION 1=NORMAL 2=EXTERNAL 3=INVERT 5=TRANSMIT CLOCK 6=CS OPTIONS 7=ANTI-STREAM 1=TIMER OFF 2=TIME 10 SEC. 3=TIME 30 SEC. 4=TIME 60 SEC.
CSU/DSU MS DBU V.25 BIS COMMANDS When configured for the V.25 bis option, the CSU/DSU MS DBU accepts in-band dialing and configuration commands from both synchronous and asynchronous DTE ports. The V.25 bis option supports the following protocols: • SDLC • Bi-Sync • Asynchronous SDLC Option Character Format • Data bits - 8 • Parity bit - Ignored Command Structure [F][A][C][V.25 bis COMMAND][FCS][F] The address field [A] is FFH. The control field [C] is set to 13H except for cases of multi-frame responses.
CHAPTER 5: Configuration Overview Special V.25 Configuration Commands In addition to the CCITT commands supported, Black Box has added configuration commands for both local and remote DSUs: CNL CNR Configuration local Configuration remote Possible responses to V.25 bis commands follows: VALA INV INVCU INVPS INVPV INVBL INVBM Valid V.
CSU/DSU MS DBU 6. Configuring Network Options The Network Options configuration parameters control the loop operation of the CSU/DSU MS DBU. Once a parameter is set, “Command Accepted” is displayed briefly before returning to the active menu. Table 6-1 shows the AT commands used to set the Network Options. See Figure 6-1 for the Network Options menu tree. Table 6-1. Network Options AT Commands Front Panel Loop Rate AUTO 2.4K 4.8K 9.6K 19.2K 38.
CHAPTER 6: Configuring Network Options 1=LOOP RATE 1=NETWORK OPT. 1=LOCAL 3=CONFIG 2=REMOTE 2=DTE OPTIONS 3=TEST OPTIONS ENTER ADDRESS 4=DIAL OPTIONS 5=MANAGEMENT 6=UTILITIES 1=AUTO 2=2.4K 3=4.8K 4=9.6K 5=19.2K 6=38.4K 7=56K 8=64K 2=NETWORK ADDR. ENTER NETWORK ADDRESS:00 3=REMOTE CONFIG. 1=DISABLED 2=ENABLED 4=NETWORK TYPE 1=DEDICATED 2=AT&T/MCI SW56 3=US SPRINT SW56 5=CLOCK SOURCE 1=MASTER 2=FROM NETWORK Figure 6-1. Network Options Menu Tree. 6.
CSU/DSU MS DBU 6.3 Remote Configuration This option sets up the CSU/DSU MS DBU to accept or reject remote configuration commands. The factory-default setting is Enabled. CAUTION Any type of remote configuration disrupts data flow. 6.4 Network Type Select the appropriate network type. The choices are dedicated, AT&T/MCI SW56, and US Sprint SW56. 6.5 Clock Source The Clock Source option specifies the timing source for the CSU/DSU MS DBU’s internal circuitry. The factory-default setting is From Network.
CHAPTER 7: Configuring DTE Options 7. Configuring DTE Options The DTE Options menu is used to select the configuration parameters that control the operation of the DTE Interface of the CSU/DSU MS DBU. The DTE Options menu tree is shown in Figure 7-1. Table 7-1 shows the available options and their AT commands. 1=DTE RATE 1=NETWORK OPT. 2=DTE OPTIONS 3=TEST OPTIONS 4=DIAL OPTIONS 5=MANAGEMENT 6=UTILITIES 1=LOCAL 3=CONFIG 1=2.4K 2=4.8K 3=9.6K 4=19.2K 5=38.4K 6=56K/57.
CSU/DSU MS DBU Table 7-1. DTE Options AT Commands Front Panel AT Command DTE Rate 1=2.4K 2=4.8K 3=9.6K 4=19.2K 5=38.4K 6=56K/57.6K 7=SAME AS LOOP 1=SCRAMBLER OFF %K3 %K4 %K5 %K6 %K7 %K8 %K9 _F0 2=SCRAMBLER ON _F1 3=SUPPRESS LBE _F2 Data Format 1=ASYNCHRONOUS 2=SYNCHRONOUS DTE CMD Option 1=DISABLED 2=AT COMMAND SET 3=V.25 SYNC 4=V.25 BSC/ASYNC Transmit Clock 1=NORMAL 2=EXTERNAL 3=INVERT CS Options 1=FORCED ON 2=FOLLOWS RS 3=FOLLOWS CD 4=FOLLOWS RS+CD 46 Description DTE rate: 2.
CHAPTER 7: Configuring DTE Options Table 7-1 (continued). DTE Options AT Commands Front Panel AT Command Description CS Options (continued) 5=OFF WITH LOCD &R4 Off 5 sec after LOCD (SW56 only) For Follows RS options, select the length of the delay. 1=CS DELAY SHORT _D0 Short delay from RS to CS selected 2=CS DELAY LONG _D1 Long delay from RS to CS selected Anti-Stream 1=TIMER OFF %T0 Anti-stream timer disabled 2=TIME 10 SEC. %T1 Timeout equals 10 seconds 3=TIME 30 SEC.
CSU/DSU MS DBU NOTE For IDLE WHEN OFF option: In SW56 mode, TR off causes the DSU to go On Hook (Idle). The unit does not dial out if TR is off. In dedicated mode, the DSU goes into DTE command mode when TR goes off. When TR goes on, if the DSU does not receive a command in the number of seconds set in S40, the DSU goes into data mode. 7.
CHAPTER 7: Configuring DTE Options 7.4 DTE Command Option The DTE Command option is used to enable a DTE command mode or disable all modes. The available modes are AT, V.25 synchronous, and V.25 bisynchronous/asynchronous commands. 7.5 Transmit Clock The Transmit clock option is used to select the source of the clock used to transfer data from the DTE into the CSU/DSU MS DBU. Table 7-1 shows the AT commands used to set the Transmit Clock options.
CSU/DSU MS DBU 7.7 Anti-Stream The Anti-Stream option is used to select the anti-stream timeout. The anti-stream timeout is the maximum time the CSU/DSU MS DBU transmits data into the network from the DTE. This feature prevents one DTE device on a multi-drop network from continuously tying up the transmit circuit back to the master DSU. The anti-stream timer is reset to zero when RS changes to the active state and is updated every second while RS is active.
CHAPTER 8: Configuring Test Options 8. Configuring Test Options The Test Options menu enables or disables different test modes and specifies the maximum test time allowed. See Figure 8-1 for the Test Options menu tree. The available options and their AT commands are listed in Table 8-1. 1=TEST TIMEOUT 1=LOCAL 3=CONFIG 2=REMOTE ENTER ADDRESS 1=NETWORK OPT.
CSU/DSU MS DBU Table 8-1.
CHAPTER 8: Configuring Test Options DBU ANSWER TEST The dial-backup connection can be tested while data is passing on the DDS. In order for this test to be performed, DBU Answer Test must be enabled on the remote unit. If DBU Answer Test is not enabled, the remote unit will not accept a DBU test from the other end. The factory-default setting is Disabled. NOTE The DBU Answer Test is not available if the DBU Criteria option “Answer Always” is Enabled.
CSU/DSU MS DBU 9. Configuring Dial Options The Dial Options menu stores up to ten phone numbers, enables/disables the SW56 auto answer capability, defines the dial-backup operation when the DDS circuit fails, and programs the passcode security feature. Figure 9-1 shows the full Dial Backup Options (4=Dial Options) menu. Note that some items are restricted to certain DBU cards. 1=PHONE NUMBERS 2=SW56 AUTO ANS STORED NUMBER TO NNNNNNN EDIT (1-10): 1=DISABLED 2=ENABLED 1=AUTOMATIC DBU 1=NETWORK OPT.
CHAPTER 9: Configuring Dial Options 9.1 Phone Numbers The CSU/DSU MS DBU stores up to 10 numbers of 36 digits each. Edit a phone number by reentering the entire number. This process overwrites the previously stored number. Table 9-1 shows the AT commands available for the Phone Number options. ISDN DIAL BACKUP Setting the Service Profile Identifier (SPID) For ISDN dial backup, the service profile identifier (SPID) is stored in Stored Number 9.
CSU/DSU MS DBU 9.3 DBU Options The DBU Options are used to select the modes of operation for the Dial Backup features. There are ten standard options available with additional options for specific backup services. Table 9-2 lists the DBU options and their AT commands for all models. 9.3.1 STANDARD DBU OPTIONS Automatic DBU The Automatic DBU option specifies whether the unit automatically enters dialbackup mode or waits for manual setup. The factory-default setting is Disabled.
CHAPTER 9: Configuring Dial Options Answer Always: If enabled, the answer unit answers any incoming call regardless of failed conditions. Weekend Lockout: If enabled, no backup will occur from midnight Friday to midnight Sunday. NOTE Weekend and daily lockout apply to automatic DBU only. Manual DBU is not affected. Also, this parameter affects the originate end only. The answer end remains DBU-capable at all times.
CSU/DSU MS DBU Fail Timer This option sets the amount of time the dedicated circuit failure condition must be active before the CSU/DSU MS DBU attempts backup. The amount of time, which is manually entered, can be as long as 990 seconds and as short as 100 ms if the 0 (zero) option is selected. The factory-default setting is 30 seconds. AUTO DBU FAIL TIME: __ __ x 10sec Wait to Redial This option works in conjunction with the preceding Redial Counter.
CHAPTER 9: Configuring Dial Options Table 9-2 (continued).
CSU/DSU MS DBU 9.3.3 DBU OPTIONS FOR V.34 CARD Table 9-3 shows the equivalent AT commands for setting Error Control, Flow Control, and Compression options. Error Control This option determines the type of error control to be negotiated at the start of a V.34 modem connection. The factory-default setting is AUTO V.42/MNP. Flow Control This option is used to select the type of flow control used by the V.34 modem. The factory-default setting is CTS Only. Compression This option is used to select V.
CHAPTER 9: Configuring Dial Options Table 9-3 (continued). DBU Options AT Commands for V.34 Card DBU Options CMD AT Description Error Control 7=AUTO V.42/MNP \N6 Auto-Reliable V.42 (LAPM) or MNP operation. Tries to use V.42 (LAPM) error control first, and MNP error control next. If neither can be used, then Normal operation is used.
CSU/DSU MS DBU passcode does not match, the answer unit sends an Invalid Passcode message to the originate unit and terminates the dial-backup connection. If a passcode is not received by an answer unit with passcode enable, or if the Passcode OK message is not received by an originate unit with passcode enabled, the dial-backup connection is terminated.
CHAPTER 10: Configuring Management Functions 10. Configuring Management Functions The Management menu is used to select the desired management interface type and to set up the necessary parameters for establishing TELNET or SNMP management. See Figure 10-1 for the Management menu tree. 1=LOCAL 3=CONFIG 2=REMOTE ENTER ADDRESS 1=NETWORK OPT.
CSU/DSU MS DBU 10.3 IP Options NOTE When configuring the CSU/DSU MS DBU with the front panel, use the “*” key to enter a decimal point. 10.3.1 UNIT IP ADDRESS Enter the CSU/DSU MS DBU IP address in dotted decimal notation. 10.3.2 SUBNET MASK Enter the subnet number in dotted decimal notation. This address is available from the network administrator. 10.3.3 GATEWAY IP ADDRESS Enter the Gateway node IP address in dotted decimal notation.
CHAPTER 10: Configuring Management Functions 10.4 SNMP Options The following options must be configured when SNMP management is used. GET COMMUNITY For SNMP operation, view and edit the Get community string. The CSU/DSU MS DBU uses this string to validate SNMP Get (read) requests. The default value is public. If using front-panel entry, see Section 10.6 for more information. SET COMMUNITY For SNMP operation, view and edit the Set community string.
CSU/DSU MS DBU AUTHENTICATION TRAPS Enable/disable the CSU/DSU MS DBU to send SNMP authentication traps to the SNMP management station. If enabled, the CSU/DSU MS DBU sends these traps when an SNMP request with an invalid community name string is received. NOTE The Black Box CSU/DSU MS DBU MIB is available in the support section of the Black Box Web page at www.blackbox.com. 10.5 TELNET Options TELNET PASSWORD View/edit the TELNET password. If using front-panel entry, see Section 10.
CHAPTER 10: Configuring Management Functions 9. Once password entry is complete, press the Enter key. NOTE A block cursor signifies movement from field to field. When you see a black cursor, pressing the Up-Arrow key deletes the current entry of that field. Pressing the Down-Arrow key advances the cursor to the next field. An underscore cursor signifies letter entry. When you see an underline cursor, pressing the Up- and Down-Arrow keys scrolls the alphabet.
CSU/DSU MS DBU 11. Configuring Unit Utilities The Utilities menu is used to enter manual commands, set/view the time and date, and view the software version, LAN MAC address, and unit serial number. See Figure 11-1 for the Utilities menu tree. AT commands are not available for this menu. 1=NETWORK OPT.
CHAPTER 11: Configuring Unit Utilities 11.1 Manual Command The Manual Command option is a shortcut method for entering configuration and control commands for the CSU/DSU MS DBU. Figure 11-1 shows the menu path for the manual command. The available manual commands are listed in Table 11-1. When using the front panel, perform the following steps to enter a manual command: 1. Select 3 = CONFIG from the Main menu. 2. Select 1 = LOCAL. 3. Select 6 = UTILITIES. 4. Select 1 = MANUAL COMMAND. 5.
CSU/DSU MS DBU Table 11-1. Manual Commands Command Description AT Command Echo Disable Enable AT Result code Enable Disable AT Long or Short code Short form (Numeric) Long form (Verbose) AT Escape Character AT CR Character AT LF Character AT BS Character AT Escape Char. Timer Abort Call Timer DTR Recognize Delay DTR Initiated Command Timeout Load Factory Opt. Option Set #1 Option Set #2 Option Set #3 Option Set #4 Network Address Lock Network Addr. Unlock Network Addr.
CHAPTER 11: Configuring Unit Utilities NOTE The CSU/DSU MS DBU has been tested for year 2000 compliance. 11.3 Software Revision View the current revision of the software installed in the CSU/DSU MS DBU. 11.4 LAN MAC Address View the LAN MAC address. This address is available when the SMP Ethernet Module is installed. 11.5 Serial Number View the CSU/DSU MS DBU’s serial number.
CSU/DSU MS DBU 12. Testing and Troubleshooting 12.1 Test Overview The CSU/DSU MS DBU performs a variety of diagnostic functions that isolate portions of the circuit to identify the source of the problem. Tests may be initiated and terminated through the front panel, VT100 terminal, SNMP, or TELNET. In asynchronous mode, AT commands can control the testing from the DTE interface. For synchronous operation, V.25 bis commands can provide test control.
CHAPTER 12: Testing and Troubleshooting 4. Select a test from the available options by pressing the corresponding number, followed by Enter. The example in Figure 12-2 shows the menu path for initiating a local DTE and Loop test. 1=DTE & LOOP(LL) 2=LOOP ONLY (RT) 2=TEST 1=LOCAL UNIT 3=DTE ONLY 2=REMOTE UNIT 4=DTE WITH TP 3=DBU CONNECTION 5=TEST PATTERN 6=SELF TEST Figure 12-2. Initiating a Test. Once a test is initiated, “Please Wait” is displayed briefly, followed by the status screen. 12.1.
CSU/DSU MS DBU 12.1.3 EXITING A TEST During a test, press Quick to access the Exit Test/Display Status menu or press Cancel to return to the Main menu. The Exit Test/Display Status menu provides the following options, which are available only after a test has been initiated (see Figure 12-4): Exit Test Exits the current test and returns to the Main menu. Display Status Reenters test display.
CHAPTER 12: Testing and Troubleshooting NOTE The Status menu must be selected in order for the unit to display status messages. Pressing Quick returns to the Main menu, where STATUS can be selected. Table 12-1. Messages from the DSU/CSU Message Meaning Probable Cause Action Loop is normal Ground local loop Indicates good signal being received local loop. from the telco. No action required; unit properly connected to telco circuit. Open loop Unit not receiving a signal from the telco.
CSU/DSU MS DBU 12.2.2 TROUBLESHOOTING NEW INSTALLATIONS Before initiating diagnostics on a newly installed unit and/or DDS circuit and before contacting Black Box Technical Support, please check the items in Table 12-2 to ensure the unit is configured properly.
CHAPTER 12: Testing and Troubleshooting remote unit is error free. Run the test using all available test patterns. NOTE If an external BERT tester is available, these additional tests may be performed: • • • DTE & Loop Test DTE Only Test Loop Only Test If the unit fails any of these tests or the problem has not been determined, contact Black Box. 12.3 Local Unit Diagnostics The local CSU/DSU MS DBU can perform six different tests; see Table 12-3. Table 12-3.
CSU/DSU MS DBU Table 12-4. DTE With Test Pattern Commands Front Panel AT Command 1=2047 PATTERN 2=511 PATTERN 3=STRESS PTRN #1 _T0&T8 _T1&T8 _T2&T8 4=STRESS PTRN #2 _T3&T8 5=STRESS PTRN #3 _T4&T8 6=STRESS PTRN #4 _T5&T8 Description Standard 2047 random data pattern. Standard 511 random data pattern. Stress pattern with alternating high and low ones densities. Repeated pattern of 100 octets: 1111 1111, followed by 100 octets: 0000 0000.
CHAPTER 12: Testing and Troubleshooting Test Purpose The DTE & Loop test is used for the following purposes: • Verify integrity of the DTE interface and cable. • Provide a loopback for network tests. Interpreting Test Results A BERT tester must be used to interpret the test results of a DTE & Loop test. 12.3.
CSU/DSU MS DBU NOTE When this test is implemented, the far unit receives an OOS/OOF message from the network and enters an alarm state. LOCAL DSU/CSU DTE TD DTE Tx NET Tx RD DTE Rx NET Rx TELCO Figure 12-7. DTE Only Test Diagram. Test Purpose The DTE Only test is used for the following purposes: • Verify integrity of the DTE interface. • Verify integrity of connection between DTE and CSU/DSU MS DBU.
CHAPTER 12: Testing and Troubleshooting Test Purpose A DTE with TP test verifies the internal transmit and receive circuitry of the CSU/DSU MS DBU. Interpreting Test Results If the unit is functioning properly, the CSU/DSU MS DBU displays: DTE WITH TP TST ERR=XX The first line of the display indicates the type of test being performed, while the second line of the display indicates the number of errors accumulated by the test pattern detector.
CSU/DSU MS DBU Test Purpose Testing using a test pattern is used for the following purposes: • Transmits user-selected test pattern using an internal test-pattern generator, and compares the received data using internal test-pattern detector to detect if there are any errors on the DDS circuit. • Injects errors and verifies that the unit transmits data across the communication circuit to the remote unit. • Helps determine from which direction the circuit is receiving errors.
CHAPTER 12: Testing and Troubleshooting The Remote Unit submenu allows a remotely installed DSU to be placed into loopback. There are six test patterns to choose from, or “Data from the DTE” may be selected. LOCAL DSU/CSU Error Inject DTE Tx Rx Test Pattern Generator DTE Tx NET Tx DTE Rx Error Clear REMOTE DSU/CSU NET Rx TELCO NET Tx DTE Tx NET Rx DTE Rx Test Pattern Detector Local Unit Initiates Test Figure 12-10. V.54 RDL with Test Pattern.
CSU/DSU MS DBU Use the number keys to type the address of the remote DSU, then press Enter. The test-pattern selections are displayed. After a test pattern is selected, the system briefly displays “Please Wait.” Test Results If the test is successful, the status menu is displayed. If not, “Unable to Execute Test” is displayed. Interpreting Test Results If the unit is functioning properly, the test error count should be 0. 12.
CHAPTER 12: Testing and Troubleshooting Figure 12-12. DBU Connection Test. Test Purpose The purpose of this test is to verify the DBU circuit and DBU modules in both the local and remote CSU/DSU MS DBU are functioning properly. Initiating Follow the menu path outlined in Figure 12-13 to initiate a DBU connection test.
CSU/DSU MS DBU 13. Activating Dial Functions The dial options available from the Main menu (4=Dial) vary depending on the network-type selection (3=CONFIG, 1=NETWORK OPT, 4=NETWORK TYPE). If AT&T/MCI SW56 or US SPRINT SW56 is selected, the options appear as shown in Figure 13-1. If DEDICATED is selected and a DBU card is installed, the options appear as shown in Figure 13-2. 4=DIAL 1=DIAL STORED # Select Stored Number 1-A 2=ENTER DIAL # NNNNNNN 3=REDIAL LAST # Figure 13-1. Dial Options Menu (SW56).
CHAPTER 13: Activating Dial Functions ANSWER UNIT CONNECTED TO DDS LINE Dial Backup The message COMMAND ACCEPTED is displayed and the CSU/DSU MS DBU waits for an incoming call. When an incoming call is detected, the CSU/DSU MS DBU answers the call and enters dial backup. ORIGINATE UNIT CONNECTED TO DDS LINE Dial Backup The CSU/DSU MS DBU prompts to dial a stored number or enter a number to dial for dial backup. Stay on Leased The CSU/DSU MS DBU remains on the leased line and does not enter dial-backup mode.
CSU/DSU MS DBU 14. Viewing Status Information The status selection displays two lines of the current operational status of the network and the DTE interfaces. After 30 seconds of no front-panel operation, the CSU/DSU MS DBU automatically reverts to the Status display; see Figure 14-1. This screen only displayed during test. DTE & LOOP LOOP 64K DTE 9.
CHAPTER 14: Viewing Status Information CURRENT STATUS OF DIAL BACKUP MODE This display line (see Figure 14-1) indicates the backup service status. Possible messages include the following: Answering Call The CSU/DSU MS DBU detected an incomingcall message and is initiating call-setup procedure. Call Disconnect Call-disconnect message received from the remote end. Called Unit Busy The unit called is currently busy and cannot be connected (ISDN only). Dialing The unit is dialing the selected number.
CSU/DSU MS DBU Open Loop The physical connection to the backup line has been broken (4-wire SW56 only). DBU Line in RDL Remote end initiated a test. Test From Telco The network provider has activated the CSU loopback (4-wire SW56 only). DBU Test Pattern The CSU/DSU MS DBU is currently performing a test with a pattern. Waiting for Call The originating CSU/DSU MS DBU is waiting on a call from the remote end. Inactive A DBU card is installed, but the CSU/DSU MS DBU is set to SW56 mode.
CHAPTER 14: Viewing Status Information Current DDS Network Status This display line (see Figure 14-1) displays the status of the main telco line. For normal operation this should display LOOP IS NORMAL; these are the other possible messages: Answering Call The CSU/DSU MS DBU detects an incoming call. Check Telco The transmit and receive (Tx/Rx) pairs of the loop connection are reversed. The pairs should be swapped for normal operation.
CSU/DSU MS DBU Appendix A. Pinouts The following tables give the pin assignments for the connectors on the back of the CSU/DSU MS DBU, the DBU cards, and the SNMP Ethernet Module. For more information on the connectors, see Chapter 2. Table A-1. Pin Assignments for Telco Connector Pin Name 1 2 3-6 7 8 R1 T1 — T R Description Transmit Data from DSU to Network—Ring 1 Transmit Data from DSU to Network—Tip 1 Not Used Receive Data from Network to DSU—Tip Receive Data from Network to DSU—Ring Table A-2.
APPENDIX A: Pinouts Table A-3.
CSU/DSU MS DBU Table A-4. Pin Assignments for Primary V.
APPENDIX A: Pinouts Table A-6. Pin Assignments for 10BASE-T Connector Pin Name 1 TD+ 2 TD- 3 RD+ 4, 5 6 N/A RD- 7, 8 N/A Description The positive signal for the TD differential pair. This signal contains the serial output data stream transmitted onto the network. The negative signal for the TD differential pair (pins 1 and 2). The positive signal for the RD differential pair. This signal contains the serial input data stream received from the network.
CSU/DSU MS DBU Appendix B. AT Commands Table B-1 shows the AT commands available for the CSU/DSU MS DBU. Table B-1.
APPENDIX B: AT Commands Table B-1 (continued).
CSU/DSU MS DBU Appendix C. Terminal Menu Structure This appendix describes the terminal menus used when managing the CSU/DSU MS DBU through either a VT100 terminal interface or a TELNET session. Examples of the terminal screens as well as a menu tree (Figure C-2) are provided. NOTE Because VT100 terminals have better display capabilities, the VT100 menu structure differs from the front-panel interface.
APPENDIX C: Terminal Menu Structure TERMINAL MENU 1 2 4 5 6 STATUS LOCAL CONFIG LOCAL TEST REMOTE TEST DIAL SW56 ESC = EXIT ENTER SELECTION -> Figure C-1. Terminal Interface Main Menu (SW56 Network Type Selected).
CSU/DSU MS DBU 1=DSU STATUS DISPLAY SCREENS 1=STATUS 2=DIAL BACKUP 2=LOCAL CONFIG 3=DIAL DIRECTORY 3=REMOTE CONFIG 1=REMOTE ADDRESS 2=EXECUTE REMOTE CONFIG 4=LOCAL TEST 1=DTE & LOOP 2=LOOP ONLY 3=DTE LOOPBACK 4=DTE (2047 PTRN) 5=DTE (511 PTRN) 6-9=DTE (DDS PTRNS #1-#4 10=XMIT 2047 PTRN 11=XMIT 511 PTRN 12-15 XMIT DDS PTRNS #1-#4 16=SELF TEST 5=REMOTE TEST 6=DIAL ESP DBU DEDICATED network type with no DBU card installed SW56 network type 1=DIAL STORED NUMBER 2=MANUAL DIAL ENTRY Figure C-2.
APPENDIX C: Terminal Menu Structure 1=DTE RATE 2=CONNECTOR TYPE 3=DTE DATA FORMAT 4=ASYNC WORD LENGTH 5=DTE CMD SET 6=TRANSMIT CLOCK 7=CS CONTROL 8=RS-CS DELAY 9=ANTI-STREAM 10=CD CONTROL 11=TR CONTROL 12=SR CONTROL 13=SCRAMBLE (64K) DTE OPTIONS NETWORK/TEST/COMMAND OPTIONS These selections are dependant upon the DBU card. See the chapter Configuring Dial Options for this portion of the menu tree. Enter/edit stored numbers 1-10.
CSU/DSU MS DBU C.1 Status Menus Status menus display all relevant information for the network and DTE interfaces. For more information, see Chapter 14. STATUS UNIT/LOOP STATUS LOOP RATE = SWITCHED 56K DTE RATE = 57.
APPENDIX C: Terminal Menu Structure CONFIGURATON MENU 1 2 3 4 5 DSU DIAL BACKUP DIAL DIRECTORY MANAGEMENT UTILITY ESC = EXIT ENTER SELECTION -> _ Figure C-5. Main Configuration Menu. C.2.1 DSU CONFIGURATION (DTE, NETWORK, AND TEST OPTIONS) Chapters 6–9 include detailed descriptions of these parameters. See Figure C-6. DSU CONFIGURATON DTE OPTIONS NETWORK/TEST/COMMANO OPTIONS 1 DTE RATE (@56K/64K) = SAME AS LOOP 14 LOOP RATE = AUTO 2 CONNECTOR TYPE - V.
CSU/DSU MS DBU S4W DIAL BACKUP DBU OPERATIO 1 DBU PASSCODE = 123 2 PASSCODE = DIS 3 NUM TO DIAL = NUM 1 4 ORG/ANS = ANS 5 AUTO RESTORE TIMER = 1 6 REDIAL COUNTER = 5 7 FAIL COND TIMER = 3 8 WAIT TO REDIAL = 10 9 DBU NETWORK TYPE = US SPRINT 10 DBU ONLINE TEST = DIS DBU CRITERIA 11 DBU EN/DIS = DIS 12 W/OOS = DIS 13 W/NO RX = DIS 14 W/NO SEAL CURR = DIS 15 ALL 1s/0s = DIS 16 ANSWER ALLWAYS = DIS 17 WEEKEND LOCKOUT = DIS 18 DIALY LOCKOUT = DIS 19 LOCKOUT EN HOUR = 17 20 LOCKOUT DIS HOUR = O8 Figure C-7.
aAPPENDIX C: Terminal Menu StructureCHAPTER SNMP 1 SYSTEM NAME = NAME 2 SYSTEM LOCATION = LOCATION 3 SYSTEM CONTACT = CONTACT 4 SNMP BET COMMUNITY = PUBLIC 5 SNMP SET COMMUNITY = PRIVATE 6 SNMP TRAP COMMUNITY = DSUIV 7 SNMP TRAPS = GENERIC ONLY 8 AUTHENTICAITON TRAPS = DIS 9 TRAP HOST IP ADDR 1 = 000.000.000.000 10 TRAP HOST IP ADDR 2 = 000.000.000.000 11 TRAP HOST IP ADDR 3 = 000.000.000.000 12 TRAP HOST IP ADDR 4 = 000.000.000.000 13 TRAP HOST IP ADDR 5 = 000.000.000.
CSU/DSU MS DBU C.3 Local/Remote Test Menus The Local Test Options menu is shown in Figure C-11. The Remote Test Options menu is shown in Figure C-12. For information on these menu items, see Chapter 12.
APPENDIX C: Terminal Menu Structure DIALING MENU 1 DIAL STORED NUMBER 2 MANUAL DIAL ENTRY ESC = EXIT ENTER SELECTION -> _ Figure C-13. SW56 Dialing Menu. C.4.2 DIAL DBU This menu is available when a module is installed in the CSU/DSU MS DBU and the Network Type is set to DEDICATED. See Chapter 13 for more information on individual menu selections. DBU CONTROL MENU DBU OPERATIONS 1 GO TO DIAL BACKUP 2 DBU ONLINE TEST ESC = EXIT ENTER SELECTION -> _ Figure C-14. Dial DBU Menu.
CSU/DSU MS DBU Appendix D. Configuration Profiles The CSU/DSU MS DBU contains four different user profiles (sets of configuration options) stored in read-only memory; see Table D-1. The unit is shipped from the factory with profile 1 loaded into the nonvolatile configuration memory. See Section 11.1 for more information on entering the manual commands required to load these profiles. PROFILE 1 Profile 1 is configured for a 56-kbps, synchronous, point-to-point or dial-up operation with a V.35 connector.
APPENDIX D: Configuration Profiles Table D-1 (continued). Configuration Profiles (00) 1 Profile Numbers (01) 2 (02) 3 (03) 4 Manual Command (continued) Test Pattern Type 2047 CS Delay Short DTR Recog.
CSU/DSU MS DBU Table D-1 (continued). Configuration Profiles (00) 1 Profile Numbers (01) 2 (02) 3 (03) 4 Test Options (continued) EIA Controlled LLB EIA Controlled RLB DBU Answer Test Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable #1 Answer Enable Enable Enable 1 minute 5 3 10 Disable AT&T Auto V.42/MNP CTS Only Enabled Disable #1 Answer Enable Enable Enable 1 minute 5 3 10 Disable AT&T Auto V.
APPENDIX E: DSU-to-Modem Interconnect Appendix E. DSU-to-Modem Interconnect Modem Tail-Circuit Application A DSU-to-modem interconnect diagram for a modem tail-circuit application is shown in Figure E-1. M O M O D D E E M M RC ETC ETC RC RD TD C S U / D D SS U U TD RD M I S V DCD RTS D B U RTS DCD For Multi-drop requirement: Figure E-1. DSU to Modem Interconnect.
CSU/DSU MS DBU Appendix F. Specifications Operating Modes • Dedicated DDS (point-to-point, multipoint) • Switched 56 (4-wire) • ISDN (1B+D) • PSTN (V.34) Network Data Rates • Dedicated-mode service rates: 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps • Switched-mode service rate: 56 kbps • Dial Backup: Switched 56 (56 kbps), V.34 (2.4 to 33.6 kbps), ISDN (56 or 64 kbps) DTE Rates Provided • DTE rates match service rates • DTE-to-loop rate matching in both dedicated and switched modes • Synchronous rates: 2.
APPENDIX F: Specifications SNMP and TELNET • Integrated SLIP/PPP port • Physical connector RJ-48 female and DB25 • Optional 10BASE-T interface with SNMP Ethernet Module • MIB II RFC 1213 complaint • Enterprise-specific MIB • SNMP traps Clocking • Normal DDS (slaved to network receive clock) • Private network master (internal) • Normal DDS tail circuit • Private network master (slaved to external clock) Switched Mode Dialing Options • Stored number • Front-panel keypad • DTR dialing of stored numbers • In-
CSU/DSU MS DBU Line Requirements Loop transmission parameters as defined in: AT&T PUB 62310: Dedicated DDS AT&T PUB 4146B: Switched 56 Sprint TS 0046: Switched 56 Line Interface RJ-48 female, 4-wire, full duplex Receiver Sensitivity -45 dB at all rates Agency Approvals UL® 1950 C-U.L.
© Copyright 1998. Black Box Corporation. All rights reserved.
