Black Box MT136A User Manual
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Black Box MT136A User Manual

Black Box MT136A User Manual

Csu/dsu ms dbu
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CUSTOMER
SUPPORT
INFORMATION
CSU/DSU MS DBU
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.com • E-mail: info@blackbox.com
JULY 1998
MT136A
MT137C
MT138C
MT139C
MT140C

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  • Page 1 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) SUPPORT FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 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.
  • Page 3 CSU/DSU MS DBU FEDERAL COMMUNICATIONS COMMISSION 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. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is...
  • Page 4 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.
  • Page 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.
  • Page 6 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.
  • Page 7 CSU/DSU MS DBU • Appendix E contains a DSU-to-modem interconnect diagram for a modem tail- circuit application. • Appendix F contains product specifications.
  • Page 8 4. If experiencing difficulty with this equipment, please contact Black Box for repair and warranty information. The telephone company may require this equipment to be disconnected from the network until the problem is corrected, or it is certain the equipment is not malfunctioning.
  • Page 9 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 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 USOC...
  • Page 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.
  • Page 11 CSU/DSU MS DBU URN 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 DMS-100, OR SERVICE OFFERED FROM A ORTHERN...

  • Page 12: Table Of Contents

    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 ......................16 1.5 TELNET ....................17 1.6 Dial-Backup Operation ................17 1.7 Dial Backup Modes ..................17 2. Installation ......................19 2.1 Unpack, Inspect, and Power Up ..............19 2.2 Rear Panel ....................20 3.

  • Page 13: Chapter Page

    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............50 7.10 Data Set Ready (SR) Options ..............50 8. Configuring Test Options ..................51 9. Configuring Dial Options ..................54 9.1 Phone Numbers ..................55 9.2 SW56 Auto Answer..................55 9.3 DBU Options ....................56...
  • Page 14 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..................71 11.5 Serial Number ..................71 12. Testing and Troubleshooting ................72 12.1 Test Overview ....................72 12.1.1 Initiating a Test ................72 12.1.2 Test Status Display................73 12.1.3 Exiting a Test..................74 12.2 Troubleshooting ..................74...
  • Page 15 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.2.3 Management Configuration............104 C.2.4 Utility Configuration..............105 C.3 Local/Remote Test Menus ..............106 C.4 Dial SW56/Dial DBU................106 C.4.1 Dial SW56 Options ................106 C.4.2 Dial DBU ..................107...

  • Page 16: Introduction

    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.

  • Page 17: Dds Operation

    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.

  • Page 18: Telnet

    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.
  • Page 19 CSU/DSU MS DBU V.34 M ODULE 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.

  • Page 20: Installation

    DB25 adapter for access to the Control/SLIP/PPP port NOTE The Black Box CSU/DSU MS DBU MIB is available from Black Box in the support section of the Black Box Web page at www.blackbox.com. The following items are included with the DBU Modules: •...

  • Page 21: Rear Panel

    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. OWER 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.

  • Page 22: Lan Interface

    CHAPTER 2: Installation S4W, V.34, or 10BASET LAN Card ISDN DBU Card DBU INTERFACE LAN INTERFACE ISDN 10 BASE T V .35 115 VAC 60HZ.15A TELCO CONTROL EIA-232 4-wire Telco Cable EIA232 Cable Bridge/Router VT 100 Terminal or device running SLIP or async PPP protocol DTE Device DTE Device...
  • Page 23 CSU/DSU MS DBU THERNET LOTS 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 dial- backup and Ethernet cards. To insert cards: 1. Remove power from the CSU/DSU MS DBU. 2.
  • Page 24 CHAPTER 2: Installation CAUTION To prevent possible radio-frequency interference emissions, a shielded cable is required. ONTROL 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.

  • Page 25: Operation

    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 SHIFT QUICK CANCEL Figure 3-1. Front Panel. LCD W INDOWS Displays menu items and messages in 2 lines by 16 characters. NTER Selects active menu items.
  • Page 26 CHAPTER 3: Operation ANCEL 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.
  • Page 27 CSU/DSU MS DBU RONT ANEL AVIGATION 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.
  • Page 28 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.
  • Page 29 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.
  • Page 30 CHAPTER 3: Operation TERMINAL MENU 1 STATUS 2 LOCAL CONFIG 4 LOCAL TEST 5 REMOTE TEST 6 DIAL SW56 ESC = EXIT ENTER SELECTION -> Figure 3-3. Terminal Interface Main Menu (SW56 Mode).

  • Page 31: Applications

    ® or SunNet Manager. NOTE The Black Box CSU/DSU MS DBU MIB is available in support section of the Black Box Web page at www.blackbox.com. SNMP and TELNET management are provided by one of the following interfaces: • A device (a router, for example) running SLIP protocol. Connection is made through the CSU/DSU MS DBU’s control port.
  • Page 32 CHAPTER 4: Applications SNMP Management Station DDS or Frame Relay SLIP/PPP SLIP/PPP Router Router EIA 232 or V.35 EIA 232 or V.35 CSU/DSU MS DBU CSU/DSU MS DBU Figure 4-1. SLIP/PPP LAN Application with SNMP/TELNET Management. SNMP Management Station Ethernet Ethernet DDS or Frame Relay Router...
  • Page 33 CSU/DSU MS DBU SNMP/TELNET A INIMUM ONFIGURATION EQUIREMENTS FOR CCESS 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.

  • Page 34: Dial-Backup Application

    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: •...
  • Page 35 CSU/DSU MS DBU PERATION URING RITICAL IMES 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.
  • Page 36 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.

  • Page 37: Configuration Overview

    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.
  • Page 38 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.
  • Page 39 CSU/DSU MS DBU 1=AUTO 1=LOOP RATE 2=2.4K 3=4.8K 4=9.6K 1=NETWORK OPT. 5=19.2K 6=38.4K 7=56K 8=64K ENTER NETWORK 2=NETWORK ADDR. 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 ENTER TIMOUT (0=OFF) : 00 SEC 1=TEST TIMOUT 2-RDL EN/DIS...
  • Page 40 CHAPTER 5: Configuration Overview 1=2.4K 2=4.8K 3=9.6K 4=19.2K 5=38.4K 1=DTE RATE 1=SCRAMBLER OFF 6=56K/57.6K 2=SCRAMBLER ON 7=SAME AS LOOP 3=SUPPRESS LBE 1=EIA 232 2=V.35 2=CONNECTOR TYPE 3=DATA FORMAT 1=ASYNCHRONOUS 1=ASYNC 9 BITS 2=SYNCHRONOUS 2=ASYNC 10 BITS 3=ASYNC 11 BITS 1=DISABLED 4=DTE CMD OPTION 2=AT COMMAND SET 3=V.25 SYNC...
  • Page 41 CSU/DSU MS DBU V.25 OMMANDS 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 •...
  • Page 42 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: Configuration local Configuration remote Possible responses to V.25 bis commands follows: VALA Valid V.25 command processed...

  • Page 43: Configuring Network Options

    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.

  • Page 44: Loop Rate

    CHAPTER 6: Configuring Network Options 1=AUTO 1=LOOP RATE 2=2.4K 3=4.8K 1=NETWORK OPT. 4=9.6K 1=LOCAL 5=19.2K 2=DTE OPTIONS 6=38.4K 7=56K 3=TEST OPTIONS 3=CONFIG 4=DIAL OPTIONS 8=64K 2=REMOTE ENTER ADDRESS 5=MANAGEMENT 6=UTILITIES 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...

  • Page 45: Remote Configuration

    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.

  • Page 46: Configuring Dte Options

    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.
  • Page 47 CSU/DSU MS DBU Table 7-1. DTE Options AT Commands Front Panel Description Command DTE Rate 1=2.4K DTE rate: 2.4K sync and async 2=4.8K DTE rate: 4.8K sync and async 3=9.6K DTE rate: 9.6K sync and async 4=19.2K DTE rate: 19.2K sync and async 5=38.4K DTE rate: 38.4K sync and async 6=56K/57.6K...
  • Page 48 CHAPTER 7: Configuring DTE Options Table 7-1 (continued). DTE Options AT Commands Front Panel Description Command 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 Short delay from RS to CS selected 2=CS DELAY LONG...

  • Page 49: Dte Rate

    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.

  • Page 50: Dte Command Option

    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.

  • Page 51: Anti-Stream

    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.

  • Page 52: Configuring Test Options

    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. ENTER TIMEOUT 1=TEST TIMEOUT (0=OFF) : 00 SEC...
  • Page 53 CSU/DSU MS DBU Table 8-1. Test Options AT Commands Front Panel AT Command Description Test Timeout ENTER TIMEOUT S18=x Specify 0-255 second test timeout RDL Enable/Disable 1=RDL IGNORED &T5 RDL request from remote DSU ignored 2=RDL ACCEPTED &T4 RDL request accepted EIA LLB Enable/Disable 1=DISABLED No response to local loopback...
  • Page 54 CHAPTER 8: Configuring Test Options DBU A NSWER 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.

  • Page 55: Configuring Dial Options

    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.

  • Page 56: Phone Numbers

    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 D ACKUP Setting the Service Profile Identifier (SPID)

  • Page 57: Dbu Options

    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.
  • Page 58 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.
  • Page 59 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.

  • Page 60: Dbu Options For S4W

    CHAPTER 9: Configuring Dial Options Table 9-2 (continued). DBU Options AT Commands for All Models Front Panel AT Command Description 1=Disabled No DBU when RX signal absent 2=Enabled DBU when RX signal absent NO SEALING CURRENT 1=Disabled No DBU when sealing current absent 2=Enabled DBU when sealing current absent WHEN ALL 1S/0S...

  • Page 61: Dbu Options For V.34 Card

    CSU/DSU MS DBU 9.3.3 DBU O V.34 C PTIONS FOR 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.

  • Page 62: Dbu Options For Isdn Card

    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 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.
  • Page 63 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.

  • Page 64: Configuring Management Functions

    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=INTERFACE 1=VT 100 CONTROL 2=SLIP CONTROL...

  • Page 65: Ip Options

    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 U IP A DDRESS Enter the CSU/DSU MS DBU IP address in dotted decimal notation. 10.3.2 S UBNET Enter the subnet number in dotted decimal notation.

  • Page 66: Snmp Options

    For SNMP operation, view and edit the Trap community string. The CSU/DSU MS DBU sends this string in SNMP trap messages to the network manager. The default value is “MT136A”. If using front-panel entry, see Section 10.6 for more information.

  • Page 67: Telnet Options

    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...
  • Page 68 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.

  • Page 69: Configuring Unit Utilities

    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.

  • Page 70: Manual Command

    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.

  • Page 71: Time/Date

    CSU/DSU MS DBU Table 11-1. Manual Commands Command Description Command Value AT Command Echo Disable Enable AT Result code Enable Disable AT Long or Short code Short form (Numeric) Long form (Verbose) AT Escape Character 00 to FF AT CR Character 00 to FF AT LF Character 00 to FF...

  • Page 72: Software Revision

    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.

  • Page 73: Testing And Troubleshooting

    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.

  • Page 74: Initiating A Test

    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...

  • Page 75: Exiting A Test

    3=REDIAL LAST # Figure 12-4. Complete Test Menu. 12.2 Troubleshooting This section is intended to provide a quick and easy means of diagnosing suspected problems associated with local or remotely attached Black Box DSU/CSUs. 12.2.1 M DSU/CSU ESSAGES FROM THE Messages on the LCD display and LEDs give information concerning the status of the unit and the local loop.
  • Page 76 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...

  • Page 77: Troubleshooting New Installations

    NSTALLATIONS 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. After verifying the items listed in Table 12-2, the unit should operate properly...

  • Page 78: Local Unit Diagnostics

    • 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. Test AT Commands...

  • Page 79: Dte & Loop (Ll)

    CSU/DSU MS DBU Table 12-4. DTE With Test Pattern Commands Front Panel AT Command Description 1=2047 PATTERN _T0&T8 Standard 2047 random data pattern. 2=511 PATTERN _T1&T8 Standard 511 random data pattern. 3=STRESS PTRN #1 _T2&T8 Stress pattern with alternating high and low ones densities.

  • Page 80: Loop Only (Rt)

    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. 12.3.2 L (RT) The Loop Only (RT) test allows the loop interface and a major portion of the...

  • Page 81: Dte With Test Pattern

    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 Tx NET Tx TELCO DTE Rx NET Rx Figure 12-7. DTE Only Test Diagram. Test Purpose The DTE Only test is used for the following purposes: •...

  • Page 82: Test Pattern

    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...

  • Page 83: Self-Test

    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. •...
  • Page 84 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 Test Pattern REMOTE Inject Generator...

  • Page 85: Dbu Connection

    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”...
  • Page 86 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. 1=98376113 2=EMPTY 3=EMPTY...

  • Page 87: Activating Dial Functions

    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.
  • Page 88 CHAPTER 13: Activating Dial Functions DDS L NSWER ONNECTED TO 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. DDS L RIGINATE ONNECTED TO...

  • Page 89: Viewing Status Information

    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 DTE &...
  • Page 90 CHAPTER 14: Viewing Status Information URRENT TATUS OF ACKUP 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 incoming- call message and is initiating call-setup procedure.
  • Page 91 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.
  • Page 92 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.

  • Page 93: Appendix A. Pinouts

    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.
  • Page 94 APPENDIX A: Pinouts Table A-3. Pin Assignments for Primary EIA-232 Connector Description Protective Ground (PG) Transmit Data (SD) Receive Data (RD) Request-to-Send (RS) Clear-to-Send (CS) Data Set Ready (SR) Signal Ground (SG) Received Line Signal Detector (CD) — +12 Test Point —...
  • Page 95 CSU/DSU MS DBU Table A-4. Pin Assignments for Primary V.35 Connector CCITT Description Protective Ground (PG) Signal Ground (SG) Request to Send (RTS) Clear To Send (CTS) Data Set Ready Received Line Signal Detector (CD) — Data Terminal Ready (DTR) —...
  • Page 96 APPENDIX A: Pinouts Table A-6. Pin Assignments for 10BASE-T Connector Name 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).

  • Page 97: Appendix B. At Commands

    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. AT Commands Command Title Default Re-execute Command none Answer none ATDn Dial Number none Echo Command Hang Up Call none Go Online none...
  • Page 98 APPENDIX B: AT Commands Table B-1 (continued). AT Commands Command Title Default AT_An LLB Control AT_Bn DBU Number to Dial AT_Cn SR Control During Test AT_Dn RTS-CTS Delay AT_En DBU Originate/Answer AT_Fn Scrambler Control AT_Gn DBU When OOS AT_Hn DBU When No RX Signal AT_In DBU When No Sealing Current AT_Jn...

  • Page 99: Appendix C. Terminal Menu Structure

    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.
  • Page 100 APPENDIX C: Terminal Menu Structure TERMINAL MENU 1 STATUS 2 LOCAL CONFIG 4 LOCAL TEST 5 REMOTE TEST 6 DIAL SW56 ESC = EXIT ENTER SELECTION -> Figure C-1. Terminal Interface Main Menu (SW56 Network Type Selected).
  • Page 101 CSU/DSU MS DBU 1=DSU STATUS DISPLAY SCREENS 1=STATUS 2=DIAL BACKUP 2=LOCAL CONFIG 3=DIAL DIRECTORY 1=REMOTE ADDRESS 4=MANAGEMENT 3=REMOTE CONFIG 2=EXECUTE REMOTE CONFIG 1=DTE & LOOP 2=LOOP ONLY 3=DTE LOOPBACK 4=DTE (2047 PTRN) 5=DTE (511 PTRN) 6-9=DTE (DDS PTRNS #1-#4 5=UTILITY 10=XMIT 2047 PTRN 11=XMIT 511 PTRN 12-15 XMIT DDS PTRNS #1-#4...
  • Page 102 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 DTE OPTIONS 8=RS-CS DELAY 9=ANTI-STREAM 10=CD CONTROL 11=TR CONTROL 12=SR CONTROL 13=SCRAMBLE (64K) 14=LOOP RATE 15=NETWORK ADDRESS 16=NETWORK TYPE NETWORK/TEST/COMMAND OPTIONS 17=CLOCK SOURCE 18=TEST TIMEOUT...

  • Page 103: Status Messages

    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 DTE LEADS LOOP RATE = SWITCHED 56K RT = OFF DTE RATE = 57.6K CTS = OFF DTE FORMAT = ASYNC TD = OFF...

  • Page 104: Dsu Configuration (Dte, Network, And Test Options)

    APPENDIX C: Terminal Menu Structure CONFIGURATON MENU 1 DSU 2 DIAL BACKUP 3 DIAL DIRECTORY 4 MANAGEMENT 5 UTILITY ESC = EXIT ENTER SELECTION -> _ Figure C-5. Main Configuration Menu. C.2.1 DSU C (DTE, N ONFIGURATION ETWORK PTIONS Chapters 6–9 include detailed descriptions of these parameters. See Figure C-6. DSU CONFIGURATON DTE OPTIONS NETWORK/TEST/COMMANO OPTIONS...

  • Page 105: Management Configuration

    CSU/DSU MS DBU S4W DIAL BACKUP DBU OPERATIO DBU CRITERIA 1 DBU PASSCODE = 123 11 DBU EN/DIS = DIS 2 PASSCODE = DIS 12 W/OOS = DIS 3 NUM TO DIAL = NUM 1 13 W/NO RX = DIS 4 ORG/ANS = ANS 14 W/NO SEAL CURR = DIS 5 AUTO RESTORE TIMER = 1...

  • Page 106: Utility Configuration

    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...

  • Page 107: Local/Remote Test Menus

    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. LOCAL TEST OPTIONS 1 DTE & LOOP 10 XMIT 2047 PTAN 2 LOOP ONLY 11 XMIT 511 PTRN...

  • Page 108: Dial Dbu

    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 D This menu is available when a module is installed in the CSU/DSU MS DBU and the Network Type is set to DEDICATED.

  • Page 109: Appendix D. Configuration Profiles

    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.
  • Page 110 APPENDIX D: Configuration Profiles Table D-1 (continued). Configuration Profiles Profile Numbers (00) 1 (01) 2 (02) 3 (03) 4 Manual Command (continued) Test Pattern Type 2047 2047 2047 2047 CS Delay Short Short Short Short DTR Recog. Delay (x100ms) DTR Command Timeout (x100) 8 Front Panel En/Dis Enable Enable...
  • Page 111 CSU/DSU MS DBU Table D-1 (continued). Configuration Profiles Profile Numbers (00) 1 (01) 2 (02) 3 (03) 4 Test Options (continued) EIA Controlled LLB Disable Disable Disable Disable EIA Controlled RLB Disable Disable Disable Disable DBU Answer Test Disable Disable Disable Disable Dial Options...

  • Page 112: Appendix E. Dsu-To-Modem Interconnect

    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. For Multi-drop requirement: Figure E-1. DSU to Modem Interconnect.

  • Page 113: Appendix F. Specifications

    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 •...
  • Page 114 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) •...
  • Page 115 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 1950 ®...
  • Page 116 © Copyright 1998. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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