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Black Box MT210A Manual

Black Box MT210A Manual

Multiport csu/dsu
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CUSTOMER
SUPPORT
INFORMATION
Multiport CSU/DSU
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
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S t a t u
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JANUARY 1999
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P o r t
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MT210A
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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 MULTIPORT CSU/DSU FEDERAL COMMUNICATIONS COMMISSION CANADIAN DEPARTMENT OF COMMUNICATIONS 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 3 MULTIPORT CSU/DSU FCC REQUIREMENTS FOR DIGITAL EQUIPMENT 1. This equipment complies with Part 68 of the FCC rules. The unit bears a label that contains the FCC registration number. If requested, you must provide this information to the telephone company. 2.
  • Page 4 MULTIPORT CSU/DSU CERTIFICATION NOTICE FOR EQUIPMENT USED IN CANADA The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications-network protective, operation, and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.
  • Page 5 MULTIPORT CSU/DSU 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 6 MULTIPORT CSU/DSU 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 7 MULTIPORT CSU/DSU TRADEMARKS The trademarks mentioned in this manual are the sole property of their owners.

  • Page 8: Table Of Contents

    MULTIPORT CSU/DSU Contents 1. Specifications ........... . . 8 2.

  • Page 9: Specifications

    MULTIPORT CSU/DSU 1. Specifications Compatibility—AT&T 62310 DDS Line Interface—Externally accessible RJ-48 female Transmission Format—Synchronous or asynchronous Transmission Line—Two unconditioned twisted pair Clock Options—Internal, external, receive loopback, and campus Interfaces—Modules: RS-232 (DB25 female), RS-422/530 (DB25 female), V.35 (M/34 female), X.21 (DB15), G.703 (RJ-45), Ethernet Bridge Speeds—Synchronous: 2.4, 4.8, 9.6, 19.2, 56, and 64 kbps;...
  • Page 10 MULTIPORT CSU/DSU Power—Universal Input (UI): 100 to 253 VAC; Input: DC: 18 VDC to 72 VDC, 48 V nominal Size—1.6"H x 7.3"W x 6.6"D (4.1 x 18.5 x 16.8 cm) Weight—2 lb. (0.9 kg)

  • Page 11: Introduction

    MULTIPORT CSU/DSU 2. Introduction 2.1 Description The Multiport CSU/DSU (part number MT210A) provides Digital Data Service (DDS) access. It connects to your network devices via your choice of interchangeable interface modules. With sync operation at up to 64 kbps or async at up to 57.6 kbps, the CSU/DSU is versatile, reliable, and hassle-free.
  • Page 12 MULTIPORT CSU/DSU • Asynchronous Data Rates: 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps • Field-replaceable DTE-DCE interface modules: V.24/RS-232, V.35, RS-422/530, G.703, X.21, and Ethernet Bridge • V.52 BER and V.54-compliant loop diagnostics • 511 and 2047 Bit Error Rate Tests •...

  • Page 13: Configuration

    MULTIPORT CSU/DSU 3. Configuration You can configure the Multiport CSU/DSU via hardware switches or a software control port. This section describes all possible configurations. 3.1 Configuring the Hardware DIP Switches The CSU/DSU has 24 DIP switches that you can configure for a wide variety of applications.

  • Page 14: Dip Switch Set S1

    MULTIPORT CSU/DSU 3.1.1 DIP S WITCH You can use the DIP switches on set S1 to configure the DTE rate, RTS/CTS delay, anti-stream timer, data format, character length, and Extended Signalling Rate (ESR). Default settings are shown in Table 3-1. All settings are shown in Table C-1.
  • Page 15 MULTIPORT CSU/DSU Switch S1-4: RTS/CTS Delay The RTS/CTS delay is the amount of time it takes for CTS to change logic state following an RTS transition. Use Switch S1-4 to select the RTS/CTS delay (measured in msec). Table 3-3. Settings for Switch S1-4. RTS/CTS Delay in msec.

  • Page 16: Dip Switch Set S2

    MULTIPORT CSU/DSU Switch S1-7: Asynchronous Character Length Set Switch S1-7 to configure the total number of asynchronous bits per asynchronous character (when Switch S1-6 is set to “On”). Table 3-6. Settings for Switch S1-7. S1-7 Setting 10 bits 11 bits NOTE The total number of bits in an asynchronous character is determined by the sum of all start bits, data bits, stop bits, and parity bits.
  • Page 17 MULTIPORT CSU/DSU Table 3-8. S2 Summary Table. Position Function Factory Default S2-1 Line Rate S2-2 Line Rate 56 kbps S2-3 Line Rate S2-4 Clock Mode Network S2-5 Clock Mode S2-6 Force RTS Signal Disabled S2-7 DSR During Local Loop S2-8 Circuit Assurance Disabled Switches S2-1, S2-2, and S2-3: Line Rate...
  • Page 18 MULTIPORT CSU/DSU Switches S2-4 and S2-5: Clock Mode Use Switches S2-4 and S2-5 to set the source of the CSU/DSU’s transmit clock. Table 3-10. Settings for Switches S2-4 and S2-5. S2-4 S2-5 Clock Mode Description External (DTE) Transmit clock derived from terminal interface.
  • Page 19 MULTIPORT CSU/DSU Switch S2-7: Data Set Ready During LOCAL Loopback Test Use Switch S2-7 to control the behavior of the DSR signal at the DTE interface during the local loopback test. Table 3-12. Settings for Switch S2-7. S2-7 Setting DSR is on during local line loop DSR is off during local line loop Switch S2-8: Circuit Assurance On dedicated circuits, you can configure the transmitter and the CTS output to go...

  • Page 20: Dip Switch Set S3

    MULTIPORT CSU/DSU 3.1.3 DIP S WITCH The configuration switches on S3 set the BER Test pattern, response to remote loop, front-panel switch activation, DTE loop request, and control-port speed. The default settings are shown in Table 3-14. All settings appear in Table C-3. Detailed descriptions for each switch in the set appear on pages 18–20.
  • Page 21 MULTIPORT CSU/DSU Switch S3-2: Response to RDL Request Use Switch S3-2 to allow the CSU/DSU to enter the Remote Digital Loopback diagnostic test when requested to do so by the remote CSU/DSU. For example, when Switch S1-8 is set to “On,” it will enter RDL mode (see Section 5.3.2) when requested to do so by the remote CSU/DSU.

  • Page 22: Configuring The Software Switches

    EIA/TIA-5611 port of the CSU/DSU. To construct an RS-232 to EIA-561 patch cable, refer to the control-port pinout diagram in Appendix A. For a pre-made cable, refer to Appendix B and call Black Box Technical Support at 724-746-5500 for details.

  • Page 23: Introduction To The Main Menu

    MULTIPORT CSU/DSU 4. After the CSU/DSU is powered on, the control port will display the login screen shown in Figure 3-19. Enter Password: ***** Figure 3-19. Login Screen. 5. Enter the password. The initial login password is: BLACKBOX 6. The CSU/DSU will then display the Main Menu screen, as shown in Figure 3-20.

  • Page 24: Configuring The Multiport Csu/Dsu

    MULTIPORT CSU/DSU 2. To execute the selection, type <enter/CR>. 3. Select Save Changes from the Main Menu after making modifications to any CSU/DSU parameter. Otherwise, changes will be lost when you power off the CSU/DSU. 4. The CSU/DSU will display its control status as “Under Hardware Control” or “Under Software Control”...
  • Page 25 MULTIPORT CSU/DSU Display Hardware Configuration Select “Display Hardware Configuration” from the Main Menu to display the configuration of hardware Switches S1, S2, and S3. See Section 3.1 to review the DIP switch definitions. Hardware Configuration (Display Only) Line Rate 56 kbps Rate adapter 19.2 kbps Transmit Clock Source...
  • Page 26 MULTIPORT CSU/DSU Software Configuration Select Software Configuration from the Main Menu to display the current settings of the software switches. The software switches control the same parameters described in Section 3.1, Configuring the Hardware Switches. See Section 3.1 to review the hardware switch definitions. Software Configuration Line Rate 56.0 kbps...
  • Page 27 MULTIPORT CSU/DSU Diagnostics/Statistics Select “Diagnostics/Statistics” from the Main Menu to monitor or activate/deactivate the CSU/DSU’s BER test patterns and V.54 loop diagnostics. These diagnostics and statistics can help to verify link integrity and isolate communication difficulties. Diagnostics and Statistics Select Active Loop Local Select Test Pattern None...
  • Page 28 MULTIPORT CSU/DSU To activate a loop diagnostic or test pattern: 1. Make sure DIP Switch 3-4 is ON. 2. Type the highlighted letter that corresponds to a menu selection. 3. Press [Space Bar] until the desired value is highlighted. 4. Press <Enter/CR> to select the desired value. Change Password Select Change Password to change the active password of the software configuration menu (see Figure 3-24, below).
  • Page 29 MULTIPORT CSU/DSU To change the active password: 1. Enter from one to six alphanumeric ASCII characters (0…9, a…z, or A…Z) at the New Password>_ prompt. 2. Press <Enter/CR>. 3. To review the new password, select Software Configuration from the Main Menu.

  • Page 30: Installation

    MULTIPORT CSU/DSU 4. Installation After you properly configure the CSU/DSU, you’re ready to connect it to the serial port, twisted-pair interface, and power source. This section explains how to make these connections. 4.1 Connecting the Serial Port The serial port interface on the CSU/DSU uses interchangeable modules to connect to your DTE.

  • Page 31: Connecting A Dte Device

    MULTIPORT CSU/DSU 3. While keeping the module’s faceplate parallel with the CSU/DSU’s rear panel, slide the module straight in, so that the card-edge contacts line up with the socket inside the chassis. NOTE The card-edge connector should meet the socket when it is almost all the way into the chassis.

  • Page 32: Configuring The X.21 Module

    MULTIPORT CSU/DSU NOTE Pinout requirements for null-modem applications vary widely between manufacturers. If you have any questions about a specific application, call Black Box Technical Support at 724-746-5500. 4.1.4 C X.21 M ONFIGURING THE ODULE The serial port on the X.21 interface module is default wired as a DCE, but may be switched to a DTE.

  • Page 33: Connecting Power

    2. Plug the power cord into a nearby AC power outlet. 3. Turn the rear power switch ON. WARNING There are no user-serviceable parts in the power-supply section of the CSU/DSU. Only qualified service personnel should replace the fuse. Call Black Box Technical Support at 724-746-5500 for more information.

  • Page 34: Operation

    MULTIPORT CSU/DSU 5. Operation After you properly configure and install the Multiport CSU/DSU, it should operate transparently. This section describes power-on, the LED status monitors, and the built-in loopback test modes. 5.1 Power-On To apply power to the CSU/DSU, first read Section 4.3, and make sure that the CSU/DSU is connected to the included power supply.

  • Page 35: Loop (V.54 And Telco) Diagnostics

    MULTIPORT CSU/DSU • CTS—Glows green to indicate that the Clear to Send signal from the modem is active. • DSR—Glows green to indicate that the CSU/DSU has asserted the Data Set Ready signal. • DCD—Glows red if no carrier signal is being received from the remote modem.

  • Page 36: Operating Remote Digital Loopback (Rdl)

    MULTIPORT CSU/DSU To perform a LAL test, follow these steps: 1. Activate LAL, in one of two ways: a. Move the front panel toggle switch up to “Local,” or, b. Activate the “LLB” signal on the DTE. If you are not sure which lead is the LLB signal, refer to Appendix A.

  • Page 37: Telco Testing

    MULTIPORT CSU/DSU 2. Perform a bit error rate test (BERT) using the internal V.52 generator (as described in Section 5.4), or using a separate BER Tester. If the BER test indicates a fault, and the Local Line Loopback test was successful for both CSU/DSUs, you may have a problem with the twisted-pair line between the two units.
  • Page 38 MULTIPORT CSU/DSU • 511 with Errors: Initiates a built-in 511 bit pseudo-random pattern generator and detector. The test-pattern generator also injects intentional errors approximately once per second, causing the Error LED to blink. • 2047: Initiates a built-in 2047 bit pseudo-random pattern generator and detector.

  • Page 39: Appendix A: Interface Pin Assignments

    MULTIPORT CSU/DSU Appendix A: Interface Pin Assignments Table A-1. RS-232, RS-530 Interface Pin Description (DB25 female connector) (DCE Configuration). Pin # Signal FG (Frame Ground) TD (Transmit Data) RD (Receive Data) RTS (Request to Send) CTS (Clear to Send) DSR (Data Set Ready) SGND (Signal Ground) CD (Carrier Detect) RC (Receive Timing-B)
  • Page 40 MULTIPORT CSU/DSU Table A-2. V.35 Interface (M/34 female connector) (DCE Configuration). Pin # Signal B - - - - - - - - - - - - - - - - - - SGND (Signal Ground) C - - - - - - - - - - - - - - - - - - RTS (Request to Send) D - - - - - - - - - - - - - - - - - - CTS (Clear to Send) E - - - - - - - - - - - - - - - - - - DSR (Data Set Ready) F - - - - - - - - - - - - - - - - - - CD (Carrier Detect)
  • Page 41 MULTIPORT CSU/DSU Table A-3. X.21 Interface (DB15 female connector) (DTE/DCE Configuration). Pin # Signal 1 - - - - - - - - - - - - - - - - - - Frame Ground 2 - - - - - - - - - - - - - - - - - - T (Transmti Data-A) 3 - - - - - - - - - - - - - - - - - - C (Control-A) 4 - - - - - - - - - - - - - - - - - - R (Receive Data-A) 5 - - - - - - - - - - - - - - - - - - I (Indication-A)

  • Page 42: Appendix B: Control Port Pin Assignments

    MULTIPORT CSU/DSU Appendix B: CSU/DSU Control Port Pinout The CSU/DSU control port is an 8-position connector that complies with EIA/TIA-561. Table B-1. CSU/DSU Control Port Pinout. Pin Function RJ-45 Pin Number Ground Receive Data (to DTE) Transmit Data (from DTE)

  • Page 43: Appendix C: Quick Reference For Dip Switch Settings

    MULTIPORT CSU/DSU Appendix C: Quick Reference for DIP Switch Settings Table C-1. DIP Switch S1 Settings. DIP Switch Position DTE Rate 2.4 kbps 4.8 kbps 9.6 kbps 19.2 kbps 38.4 kbps DTE Rate= Off* Line Rate* RTS/CTS Delay Normal* Off* Extended Anti-Stream Timer Disabled...
  • Page 44 MULTIPORT CSU/DSU Table C-2. DIP Switch S2 Settings. DIP Switch Position Line Rate 2.4 kbps 4.8 kbps 9.6 kbps 19.2 kbps 56 kbps* Off* 64 kbps **See note. Clock Mode External (DTE) Network (Looped)* Off* Off* Internal (Master) Campus Clock Force RTS Forced On Follows DTE Signal*...
  • Page 45 MULTIPORT CSU/DSU Table C-3. DIP Switch S3 Settings. DIP Switch Position Test Pattern 511 BER* Off* 2047 BER Response to RDL Request Enabled* Off* Disabled Front Panel Switch Enabled* Off* Disabled DTE Loop Request Line Enabled Disabled* Not used Off* Off* Control Port Data Rate 9.6 kbps...
  • Page 46 © Copyright 1999. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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