Black Box ME0004C-G703 Manual
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Black Box ME0004C-G703 Manual

Black Box ME0004C-G703 Manual

High-speed 2-wire short-range dsl line driver
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High-Speed 2-Wire Short-Range DSL
CUSTOMER
SUPPORT
INFORMATION
Line Driver
(mDSL Rack Card)
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
NOVEMBER 2001
ME0004C-10BT
ME0004C-G703
ME0004C-RS530
ME0004C-V24
ME0004C-V35
ME0004C-X21

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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 FCC AND IC RFI STATEMENTS 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 B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is...
  • Page 3 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD 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 4 NOM STATEMENT 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 5 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD TRADEMARKS USED IN THIS MANUAL DECnet™ is a trademark of Digital Equipment Corporation. Internet Explorer ® is a registered trademark of Microsoft Corporation. IPX™ is a trademark of Novell Incorporated. NetBIOS ® is a registered trademark of International Business Machines Corporation.

  • Page 6: Table Of Contents

    CONTENTS Contents Chapter Page 1. Specifications ........... . 7 2.

  • Page 7: Chapter Page

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Chapter Page Appendix D. G.703/G.704 Rear Card Module ......44 D.1 Description .

  • Page 8: Specifications

    CHAPTER 1: Specifications 1. Specifications Transmission Format: Synchronous Transmission Line: Two-wire unconditioned twisted pair Clocking: Internal, external, or receive recovered clock Interface Modules: 10BASE-T, G.703/G.704, RS-530, V.24, V.35, X.21 Line Rates: 144, 272, 400, 528, 784, 1040, 1552, 2064, and 2320 kbps DTE Rates: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728, 1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, and 2304 kbps...

  • Page 9: Introduction

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD 2. Introduction 2.1 Description The High-Speed 2-Wire Short-Range DSL Line Driver Rack Card provides high- speed 2-wire connectivity to ISPs, PTTs, and corporations using mDSL (Multi-rate Digital Subscriber Line) technology. Multi-rate DSL offers the ability to deliver the maximum bit rate that a twisted-pair line can accommodate.
  • Page 10 CHAPTER 2: Introduction • SNMP network management with in-band management of remote units plus advanced diagnostics and statistics using the RM261C-SNMP. • Internal, external, or receive recovered clocking options. • LED indicators for TD, RD, CTS, CD, DTR, TM, ER, and NS.

  • Page 11: Configuration

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD 3. Configuration 3.1 Configuring the Hardware Switches The mDSL Rack Card front card uses hardware switches for configuration. An interface driver board strap and three eight-position DIP switches are positioned on the bottom side of the front card (see Figure 3-1). Figure 3-1.

  • Page 12: Reversible Interface Driver Board

    CHAPTER 3: Configuration 3.1.1 R EVERSIBLE NTERFACE RIVER OARD The mDSL Rack Card features switchable interface driver boards that allow a wide range of DTE interface connections. Figure 3-3 shows the interface driver board on the top of the mDSL Rack Card PC board. Interface Driver Board...

  • Page 13: Connecting To Adte Device

    Appendix A as a guide. 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. 3.1.4 C X.21 I ONFIGURING THE...

  • Page 14: Configuring Dip-Switch Set S2

    CHAPTER 3: Configuration NOTE If you are not using your mDSL Rack Card in a network-managed environment, please set all S1 switches to the ON position. 3.1.6 C DIP-S ONFIGURING WITCH The configuration switches on S2 allow you to specify the clocking mode and response to DTE loop enable.
  • Page 15 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Switches S2-6 and S2-7: Clock Mode Use Switches S2-6 and S2-7 to configure the mDSL Rack Card for internal, external, or receive recover clock mode. Table 3-2. Clock mode. CO/CP S2-6 S2-7 Clock Mode Description Unit...

  • Page 16: Configuring Dip-Switch Set S3

    CHAPTER 3: Configuration 3.1.7 C DIP-S ONFIGURING WITCH Use the eight DIP switches in Switch S3 to enable the DTE connection rate. The following table summarizes default positions of DIP-Switch S3. Detailed descriptions of each switch follow the table. Table 3-4. S3 summary. Position Function Factory Default...
  • Page 17 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Table 3-5 (continued). DTE bit rate. S3-1 S3-2 S3-3 S3-4 S3-5 S3-6 DTE Rate (kbps) 1024 1088 1152 1216 1280 1344 1408 1472 1536 1600 1664 1728 1792 1856 1920 1984 2048 2112 2176 2240...

  • Page 18: Mdsl Rack Card Plug-And-Play

    CHAPTER 3: Configuration Table 3-6. Reset software defaults. S3-7 Setting Normal Operation Reset Switch S3-8: Transmit Data (TD) Sampling Point Table 3-7. Transmit data sampling point. S3-8 Setting Description Normal TD sampled on the falling edge of the mDSL Rack Card Transmit Clock (TC) Invert TD sampled on the rising edge of the mDSL Rack Card Transmit Clock...

  • Page 19: Configuring The Rear Interface Card

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD mDSL Rack mDSL Rack Card (ME0004C) Card (ME0004C) (CO) (CP) DIP switches configured DIP switches all in ON position. according to specific application requirements. Figure 3-4. Typical Plug-and-Play application. When the units are connected, the CP will come up with a predefined default configuration (Receive Recovered clocking).

  • Page 20: Db25 (Rs-530 And V.24) Rear Card Strap Settings

    CHAPTER 3: Configuration Figure 3-5. Orientation of interface card straps. Sections 3.3.1, 3.3.2, and 3.3.3 describe the strap locations and possible settings for each rear card. 3.3.1 DB25 (RS-530 V.24) R TRAP ETTINGS Figure 3-6 shows strap locations for the DB25 rear cards. These straps determine various grounding characteristics for the terminal interface and twisted-pair lines.
  • Page 21 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Table 3-8 provides an overview of interface strap functions for the rear interface cards. Following the table overview are detailed descriptions of each strap’s function. Table 3-8. Interface card strap summary. Strap Function Position 1 and 2 Position 2 and 3 DTE Shield (Pin 1) and FRGND...

  • Page 22: M/34 (V.35) Rear Card Strap Settings

    CHAPTER 3: Configuration 3.3.2 M/34 (V.35) R TRAP ETTINGS Figure 3-7 shows the strap location for the M/34 rear card. This strap determines whether signal ground and frame ground will be connected. Figure 3-7. Strap locations. Table 3-11 provides an overview of interface strap functions for the rear interface cards.

  • Page 23: Db15 (X.21) Rear Card Strap Settings

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD DTE Shield (M/34 Pin A) and FRGND (JB3) In the connected position, this strap links M/34 pin A and frame ground. In the open position, pin A is disconnected from frame ground. Table 3-12.
  • Page 24 CHAPTER 3: Configuration Figure 3-8. Strap locations. Table 3-14 provides an overview of interface strap functions for the rear interface cards. Following the table overview are detailed descriptions of each strap’s function. Table 3-14. Interface card strap summary. Strap Function Position 1 and 2 Position 2 and 3 DTE Shield (Pin 1)
  • Page 25 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD DTE Shield (DB15 Pin 1) and FRGND (JB3) In the connected position, this strap links DB15 pin 1 and frame ground. In the open position, pin 1 is disconnected from frame ground. Table 3-15.
  • Page 26 CHAPTER 3: Configuration Installing the X.21 Daughterboard onto the X.21 Line Driver Card Figure 3-9 shows the X.21 daughterboard, DCE/DTE selector, and jumper (JP1) location with respect to the rack card. Following Figure 3-9 are guidelines for the installation of the X.21 daughterboard, setting for DCE/DTE, and a brief description of Jumper JP1.
  • Page 27 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD DCE/DTE Selector for the X.21 Daughterboard The X.21 daughterboard can be set up as a DCE (default) or DTE device. The DCE/DTE selector must be installed in the X.21 daughterboard for any configuration.

  • Page 28: Installation

    The front card is then secured by thumbscrews, and the rear card by conventional metal screws. WARNING There are no user-serviceable parts in the power-supply section of the rack chassis. Voltage-setting changes and fuse replacement should only be performed by qualified service personnel. Contact Black Box Technical Support at 724-746-5500 for details.

  • Page 29: Installing The Mdsl Rack Card Into The Chassis

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Powering Up Your Rack The power supplies that come with your rack system are equipped with a power- entry connector on the rear card. The power supplies are hot-swappable, so you are not required to remove the cards from the rack while applying power to the system.

  • Page 30: Wiring The Mdsl Rack Card

    CHAPTER 4: Installation 4.3 Wiring the mDSL Rack Card Each of the rear interface cards compatible with the mDSL Rack Card has one terminal interface port and one 2-wire (twisted-pair) port. For specific interface pinouts, refer to the diagrams in Appendix A. 4.3.1 C ONNECTION TO THE WISTED...

  • Page 31: Operation

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD 5. Operation Once the mDSL Rack Card is properly configured and installed, it should operate transparently. This chapter describes functions of the LED status indicators and the use of the built-in loopback test modes. 5.1 LED Status Indicators The mDSL Rack Card features twelve front-panel LEDs that monitor power, the DTE signals, network connection, and test modes.

  • Page 32: Test Modes

    CHAPTER 5: Operation • ER: Blinks ON/OFF after a 511/511E test has timed out. See Section 5.2.4 for more information. Flashes once to indicate that a CRC error has occurred (during normal operation) or bit errors have occurred (during 511/511E test). Only at power up, blinks once every 200 ms if the DTE rate is set to an unsupported setting.

  • Page 33: Restart Procedure And Timeouts

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD • Framer: The framer is used to determine the status of the line. In normal operation, the framer transmits and expects to receive framed packets from the far end. If the framer receives framed packets from the far end, CTS and CD will be active.

  • Page 34: Loops And Patterns

    CHAPTER 5: Operation Table 5-1. Test mode timing. Item Elapsed Time (seconds) Startup Data Mode 511/511E Generator Enabled 60 (The generator will stop after 45 seconds.) Remote End of an RDL 511/511E Timeout 45 (The pattern generator will automatically turn off after 45 seconds. The ER LED will flash until you turn off the 511/511E switch.) Symbol Indicators...
  • Page 35 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD will be looped back to the local DTE by the loop control block within the processor. Any data present on the line or at the far-end DTE interface is invalid. The remote unit will remain in the startup mode, NS LED off, CTS LED yellow, and CD LED yellow, until the local unit is taken out of the local loop mode.
  • Page 36 DTE and the remote DTE are not valid. Because the data is unframed, there is no way for the framer to send this data out to the DTE. This is an important distinction because other Black Box units will send out the 511 pattern.
  • Page 37 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Pattern Loop Pattern Loop Line Framer Gen./Det. Control Gen./Det. Control Framer Processor Processor Figure 5-6. Local loop mode 2 with 511/511E. Remote Digital Loop The remote loop uses the EOC channel (an out-of-band signaling channel) to establish the remote link.
  • Page 38 CHAPTER 5: Operation Remote Digital Loop with 511/511E The Remote Digital Loop with 511/511E is shown below. After RDL is established, the remote unit’s restart timer is set to one minute. This is because when the 511/511E generator is started on the local unit, the remote framer begins seeing unframed packets.

  • Page 39: Using The V.52 (Ber) Test-Pattern Generator

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Framer Pattern Loop Pattern Loop Line Framer Gen./Det. Control Gen./Det. Control Processor Processor Figure 5-9. Data mode with 511/511E. 5.2.4 U V.52 (BER) T SING THE ATTERN ENERATOR To use the V.52 BER tests in conjunction with the Remote Digital Loopback tests (or with Local Line Loopback tests), follow these instructions: 1.

  • Page 40: Appendix A. Terminal Interface Pin Assignments

    APPENDIX A: Terminal Interface Pin Assignments Appendix A. Terminal Interface Pin Assignments Table A-1. V.35 interface pin assignments, 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)
  • Page 41 HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Table A-2. RS-232, RS-530 interface pin assignments, DB25 female connector (DCE configuration). Pin # Signal 1 - - - - - - - - - - - - - - - - - - - - - - - - - FG (Frame Ground) 2 - - - - - - - - - - - - - - - - - - - - - - - - - TD (Transmit Data-A) 3 - - - - - - - - - - - - - - - - - - - - - - - - - RD (Receive Data-A) 4 - - - - - - - - - - - - - - - - - - - - - - - - - RTS (Request to Send-A)
  • Page 42 APPENDIX A: Terminal Interface Pin Assignments Table A-3. X.21 interface pin assignments, DB15 female connector (DTE /DCE configuration). Pin # Signal 1 - - - - - - - - - - - - - - - - - - - - - - - - - Frame Ground 2 - - - - - - - - - - - - - - - - - - - - - - - - - T (Transmit Data-A) 3 - - - - - - - - - - - - - - - - - - - - - - - - - C (Control-A) 4 - - - - - - - - - - - - - - - - - - - - - - - - - R (Receive Data-A)

  • Page 43: Appendix B. Distance Tables

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Appendix B. Distance Tables Table B-1. No crosstalk. Line DTE Rates 26 AWG 24 AWG Rate (0.4 mm) (0.5 mm) (kbps) (kbps) feet miles feet miles 64, 128 21,400 30,700 192, 256 20,300 30,600 320, 384...

  • Page 44: Appendix C. Line Interface Pin Assignments

    APPENDIX C: LineInterface Pin Assignments Appendix C. Line Interface Pin Assignments Table C-1. RJ-45 connector pinout. Pin Number Signal 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N/C (No connection) 2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N/C (No connection) 3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - N/C (No connection) 4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Tip...

  • Page 45: Appendix D. G.703/G.704 Rear Card Module

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Appendix D. G.703/G.704 Rear Card Module D.1 Description The G.703/G.704 Rear Card Module provides E1/Fractional E1 termination and extension capabilities to the IDSL Line Drivers and Rack Cards. When used with an IDSL Rack Card or Line Driver, a G.703/G.704 line can be terminated or extended to a remote site up to 10 km (6.2 mi.) away.

  • Page 46: Network Extension Application

    APPENDIX D: G.703/G.704 Rear Card Module Line Driver with Module and nx64 kbps Serial Interface Line Driver G.703/G.704 Network V.35 Receive Recover External Router Cable Clocking Clocking Span Clock/ Clock/ Data Data Clock/ Data Data V.35 Module ME0004C ME0004C Module Figure D-1.

  • Page 47: Configuration

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD D.3 Configuration The G.703/G.704 Rear Card module can be configured via hardware switches and jumpers. Sections D.3.1 and D.3.2 describe all switch and jumper configurations. D.3.1 DIP-S WITCH ONFIGURATION The module has eight internal DIP switches (S1-1 through S1-8). The DIP switches can be configured as either On or Off.
  • Page 48 APPENDIX D: G.703/G.704 Rear Card Module Line Coding Options High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter deliberately inserts a bipolar violation when excessive zeros in the data stream are detected. The receiver recognizes these special violations and decodes them as zeros. This method enables the network to meet minimum pulse-density requirements.

  • Page 49: Jumper Configuration

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Switches S1-4 through S1-8: Reserved These switches are reserved for future use and should be set to OFF. D.3.2 J UMPER ONFIGURATION The module has four jumpers (two position headers): JP4, JP5, JP6, and JP7. These jumpers are used to select input and output impedance matching between the module and external line.

  • Page 50: Making Interface Connections

    APPENDIX D: G.703/G.704 Rear Card Module D.5 Making Interface Connections The module may be connected to G.703/G.704 ports using a single 120-ohm RJ- 48C or a dual 75-ohm coax (BNC) connector. The module rear panels and the location of these connectors are shown in Figure D-5. Figure D-5.

  • Page 51: Connect Dual Coaxial Cable (75 Ohm) To G.703/G.704 Network

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD (Not connected) 8 - - - - - - - - - - - - - (Not connected) 7 - - - - - - - - - - - - - (Not connected) 6 - - - - - - - - - - - - - (TX+) 5 - - - - - - - - - - - - -...
  • Page 52 APPENDIX D: G.703/G.704 Rear Card Module (Data TO G.703/G.704 network) (Data FROM G.703/G.704 network) Figure D-7. 75-ohm dual coaxial G.703 interface. NOTE The outer conductor of the coax cables are isolated from system earth ground.

  • Page 53: Appendix E. 10Base-T Ethernet Rear Card Module

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD Appendix E. 10BASE-T Ethernet Rear Card Module E.1 Description The Ethernet Bridge Module installs in the Managed Micro Rack system to provide seamless Ethernet LAN extension. The Module bridges two physically separate Ethernet LANs at the MAC level.

  • Page 54: Configuration

    APPENDIX E: 10BASE-T Ethernet Rear Card Module E.2 Configuration The 10BASE-T Ethernet Rear Card Module plugs into the ME0001C and ME0004C Line Drivers to provide Ethernet LAN extension. The Ethernet Card has no switches or jumpers and does not need to be configured. However, factors such as the type of medium, throughput across the link, and clocking mode must be determined by the settings of the baseband Line Drivers (ME0001C and ME0004C).

  • Page 55: Installing The Rear Interface Card And The Front Function Card

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD 10BASE-T Ethernet Bridge Module Interface Driver Board Rear Front Figure E-2. Interface driver board mounted on a ME0003C or ME0004C front card. Follow the instructions below to connect the interface driver board to the front function card.

  • Page 56: Connecting To The 10Base-T Ethernet Port

    APPENDIX E: 10BASE-T Ethernet Rear Card Module E.5 Connecting to the 10BASE-T Ethernet Port The 10BASE-T Ethernet Rear Card module provides line side connections through an RJ-45 connector. Figure E-3 shows the rear panel and the locations of the connectors. RJ-45 Line Side 10BASE-T...

  • Page 57: Connecting The 10Base-T Ethernet Port To A Hub

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD - - - - - - - - - - - - - - - - - 1 TD+ (data output from ME0004C) - - - - - - - - - - - - - - - - - 2 TD- (data output from ME0004C) - - - - - - - - - - - - - - - - - 3 RD+ (data input to ME0004C) - - - - - - - - - - - - - - - - - 4 Not connected - - - - - - - - - - - - - - - - - 5 Not connected...

  • Page 58: Connecting The Line Interface

    APPENDIX E: 10BASE-T Ethernet Rear Card Module Rear Card 10BASE-T DTE RJ-45 Pin No. RJ-45 Pin No. 1 (TD+) 1 (TD+) 2 (TD-) 2 (TD-) 3 (RD+) 3 (RD+) 6 (RD-) 6 (RD-) Figure E-6. Crossover cabling. E.5.3 C ONNECTING THE NTERFACE The 10BASE-T Ethernet rear card must be used with a front function card.

  • Page 59: Operation

    HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD NOTE Two-wire line drivers use RJ-45 pins 4 and 5. E.6 Operation In order to operate, the rear card must be connected to a front function card and installed in the rack unit. It also requires a 10BASE-T connection. After power is applied, the rear card automatically starts performing the bridging function without further user intervention.
  • Page 60 APPENDIX E: 10BASE-T Ethernet Rear Card Module • Status: Blinks yellow from one to eleven times to indicate system status. Each pulse pattern is separated by a 2 second “off” period. Greater pulse patterns have higher priority (buffer saturation has greater priority than an empty MAC table).
  • Page 61 © Copyright 2001. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

This manual is also suitable for:

Me0004c-10btMe0004c-rs530Me0004c-v35Me0004c-v24Me0004c-x21

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