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Cisco 1751V Hardware Installation Manual
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Cisco 1751V Hardware Installation Manual

Cisco 1751V Hardware Installation Manual

Hardware installation guide
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Cisco 1751 Router Hardware
Installation Guide
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel:
408 526-4000
800 553-NETS (6387)
Fax:
408 526-4100
Customer Order Number: DOC-7811258=
Text Part Number: 78-11258-04

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Summary of Contents for Cisco 1751V

  • Page 1 Cisco 1751 Router Hardware Installation Guide Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Customer Order Number: DOC-7811258= Text Part Number: 78-11258-04...
  • Page 2 You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures: •...
  • Page 3 CCSP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE,...

  • Page 5: Table Of Contents

    Additional Required Equipment 1-11 Installation C H A P T E R Before Installing the Router Connecting the Router to Your Local Network Installing WICs and VICs Safety Information Connecting Power to the Router Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 6 A P P E N D I X Cabling Specifications A P P E N D I X Ethernet Cables Ethernet Network Cabling Guidelines Console Cable and Adapters VIC Cables and Pinouts Cables and Pinouts for 2-Port ISDN BRI Card Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 7 Tools and Equipment Required VPN Module Parts Safety Warnings Preventing Electrostatic Discharge Damage Installing the VPN Module in a Cisco 1751 Router Opening the Cisco 1751 Chassis Installing the VPN Module Closing the Cisco 1751 Chassis Installing the Echo Canceler Expansion Modules on Cisco Interface...
  • Page 8 Contents Cisco 1751 Router Hardware Installation Guide viii 78-11258-04...

  • Page 9: About This Guide

    Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com. If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar, and select Documentation. After you complete the form, click Submit to send it to Cisco.

  • Page 10: Audience And Scope

    We assume that Cisco 1751 router users are familiar with the terminology and concepts of local Ethernet and wide-area networking. This guide describes the functional and physical features of the Cisco 1751 router and provides installation procedures, troubleshooting information, technical specifications, and cable and connector guidelines and specifications.

  • Page 11: Related Publications

    Cisco 2-port multiflex trunk interface cards. Cisco WAN Interface Cards Hardware Installation Guide describes how to • install and configure the WICs and VICs that are supported by the Cisco 1751 router. Cisco IOS command reference and configuration guides provide complete •...
  • Page 12 éviter les accidents. Pour prendre connaissance des traductions d’avertissements figurant dans cette publication, consultez le document Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui accompagne cet appareil. Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 13 Para ver as traduções dos avisos que constam desta publicação, consulte o documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) que acompanha este dispositivo. Cisco 1751 Router Hardware Installation Guide xiii 78-11258-04...

  • Page 14: Commands

    ^D or Ctrl-D, you should hold down the Control key while you press the D key. Examples of information displayed on the screen. screen font boldface screen font Examples of information that you must enter. Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 15 About This Guide Conventions Table 1 Command Syntax Guide Convention Description < > Nonprinting characters, such as passwords, appear in angled brackets. Default responses to system prompts appear in square brackets. Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 16 About This Guide Conventions Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 17: Chapter 1 Cisco 1751 Router Overview

    C H A P T E R Cisco 1751 Router Overview This chapter introduces the Cisco 1751 router, also referred to in this guide as the router, and covers the following topics: Key Features • Rear-Panel Ports and LEDs •...

  • Page 18: Key Features

    A C T C O L Key Features The Cisco 1751 router is a voice-and-data capable router that provides Voice-over-IP functionality (VoIP) and can carry voice traffic (for example, telephone calls and faxes) over an IP network. Using one to four WAN connections, the router links small-to-medium-size remote Ethernet and FastEthernet LANs to central offices.
  • Page 19 VoIP, VoFR, and VoATM support Supports Voice over IP, Voice over Frame Relay, and Voice over ATM connections. AutoInstall support Supports AutoInstall to download configuration files to the router over a WAN connection. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 20: Rear-Panel Ports And Leds

    Cisco 1751 router. Cisco Voice Manager support Supports Cisco Voice Manager to help you install and operate voice and fax services over the IP network. Compatible with Cisco Networked Stackable with other Cisco Networked Office stack products.
  • Page 21 Terminal or PC connection for local configuration using (light blue) Cisco IOS software. WIC/VIC slot SLOT 0 Supports either a Cisco WIC or VIC. For detailed information, refer to the Cisco WAN Interface Cards Hardware Installation Guide that comes with every card. WIC/VIC slot SLOT 1 Supports either a Cisco WIC or VIC.

  • Page 22: Front-Panel Leds

    Use the router front-panel LEDs to determine network activity and status on the Ethernet port and on the WIC and VIC ports. The front-panel LEDs are illustrated Figure 1-3 and described in Table 1-4. Figure 1-3 Front-Panel LEDs SLOT2 SLOT0 SLOT1 Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 23 Blinks when data is being sent to or received from the port. For the VIC-2BRI-ST-NT/TE, blinks when 2-port serial data is being sent to or received from any of the B channels. VIC-2E&M VIC-2FXO VIC-2FXS VIC-2BRI-ST-NT/TE WIC1-ADSL Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 24 Serial and CSU/DSU Off. Green ISDN On when the first ISDN B channel is connected. 2-port serial Blinks when data is being sent to or received from the port. VIC-2E&M VIC-2FXO VIC-2FXS VIC-2BRI-NT/TE Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 25: Router Memory

    • DRAM is also called working storage and contains the dynamic configuration information. The router stores a working copy of Cisco IOS software, dynamic configuration information, and routing table information in DRAM. The Cisco 1751 router ships with 32 MB of DRAM.

  • Page 26: Router Memory

    Cisco IOS software. The Flash memory structure can store multiple copies of the Cisco IOS software. You can load a new level of the operating system in every router in your network and then, when convenient, upgrade the whole network to the new level.

  • Page 27: Unpacking The Router

    Console cable, RJ-45 to DB-9 (light blue) • • Product documentation Additional Required Equipment Depending on your local network and which Cisco WICs and VICs you install in your router, you might need other items listed in Table 1-6 to complete your router installation.
  • Page 28 Serial cable This cable connects a serial card to serial services. You must order this cable from Cisco. For detailed information about serial cable types, refer to the Cisco WAN Interface Cards Hardware Installation Guide that comes with every card.

  • Page 29: Installation

    Before Installing the Router • Connecting the Router to Your Local Network • Installing WICs and VICs • • Connecting Power to the Router Verifying Your Installation • Optional Installation Steps • Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 30: Chapter 2 Installation

    Be sure to read the safety information in the Regulatory Compliance and Safety Information for Cisco 1700 Routers document that came with your router. Warning Read the installation instructions before you connect the system to its power source.

  • Page 31: Connecting The Router To Your Local Network

    SELV circuits to the telephone network voltage (TNV) circuits. (To see translated versions of this warning, refer to the Regulatory Compliance and Safety Information for Cisco 1700 Routers document that came with the router.) Always connect the Ethernet cable to the yellow ports on the router. Do not...

  • Page 32: Connecting The Router To Your Local Network

    -1 2 10/100 V D C Ethernet port Ethernet hub or switch (10, 100, or 10/100 Mbps) 10/100 SPEED 2 3 4 100BaseTX SOLID 5 6 7 8 10BaseT BLINK MDI-X Straight-through Ethernet cable Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 33: Installing Wics And Vics

    Installing WICs and VICs Installing WICs and VICs The router supports one to two Cisco WICs and one to three Cisco VICs. Each WIC has one or two WAN ports and each VIC has one or two voice ports. This section describes the procedure for installing a WIC or a VIC in the router.
  • Page 34 E T H E R N E A U X PV D M Interface card slot cover M O D SL O T 2 O K + 5, + 12 , -1 2 V D C Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 35 PV DM SE E N U A M O D EF O SL OT IN ST A LL 2 O K A TI +5 , +1 2, -1 2 V D C Interface card Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 36: Connecting Power To The Router

    Step 3 Press the router power switch to on ( | ). Step 4 Confirm that the router has power by checking that the PWR LED on the front Step 5 panel is on. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 37: Verifying Your Installation

    OK (front panel)—On when the router software is loaded and functional. • Blinking means that the router is performing a power-on self-test (POST). ETH ACT (front panel)—Blinking when there is network traffic on the local • Ethernet LAN. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 38: Optional Installation Steps

    • Connecting a PC If you want to configure the router through the Cisco IOS command-line interface (CLI), you must connect the router console port to a terminal or PC. The cable and adapter required for this connection are included with the router.

  • Page 39: Connecting A Modem

    You can use the light blue console cable that came in the accessory kit. If you are using the light blue cable with the console port, you can use any crossover RJ-45-to-RJ-45 cable. Cisco 1751 Router Hardware Installation Guide 2-11 78-11258-04...
  • Page 40 ET HE RN ET A U X PV DM MO D SL OT 2 OK +5 , +1 2, -1 2 VD C AUX port (RJ-45) Modem Modem cable DB-9-to-DB-25 adapter EIA/TIA-232 Cisco 1751 Router Hardware Installation Guide 2-12 78-11258-04...

  • Page 41: Wall-Mounting

    We recommend using pan-head or round-head screws. Figure 2-7 Wall-Mount Brackets—Bottom of Router Front panel of router Mounting Mounting bracket bracket 3.75" Bottom (9.52 cm) of router Mounting Mounting bracket bracket Cisco 1751 Router Hardware Installation Guide 2-13 78-11258-04...
  • Page 42 5/16 inch) to secure the screws. If the screws are not properly anchored, the strain of the cables connected to the router rear-panel connectors could pull the router from the wall. Cisco 1751 Router Hardware Installation Guide 2-14 78-11258-04...

  • Page 43: Troubleshooting

    Before you call, you should have the following information ready: Chassis type and serial number • Maintenance agreement or warranty information • Cisco IOS release installed on your router • Date you received the router • • Brief description of the problem Brief description of the steps you have taken to isolate the problem •...

  • Page 44: Recovering A Lost Password

    (for lost enable secret passwords only) • Resetting the Configuration Register Value • See the “Hot Tips” section on Cisco Connection Online (CCO) for additional Note information on replacing enable secret passwords. Changing the Configuration Register Follow these steps to change the configuration register:...
  • Page 45 DEPLOYMENT RELEASE SOFTWARE (fc1) Victrola_3B uptime is 23 hours, 54 minutes System returned to ROM by power-on Running default software cisco 1751 (MPC860) processor (revision 0x5947) with 49152K/16384K bytes of memory. Processor board ID JAB30343106 (4266066989), with hardware revision 0000 M860 processor: part number 5, mask 1 Bridging software.

  • Page 46: Resetting The Router

    Press RETURN to get started! Step 6 Press Return. The following prompt appears: Router> Enter the enable command to enter privileged EXEC mode. Configuration Step 7 changes can be made only in this mode. Router> enable Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 47: Resetting The Password

    Enter the config-register command and the original configuration register value Step 3 that you recorded in Step 5 in the “Changing the Configuration Register” section earlier in this chapter. Press Ctrl-Z to exit configuration mode. Step 4 Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 48: Resetting The Configuration Register Value

    • front panel to help identify a failure. For more information on WICs and VICs, refer to the Cisco WAN Interface Cards Hardware Installation Guide that comes with each card. Cables—Check all the external cables that connect the router to the network.

  • Page 49: Ok Led Diagnostics

    3-1), depending on the problem. A pattern is a specific number of blinks that is repeated until the router is turned off. If the router experiences any of these problems, contact your Cisco reseller. Table 3-1 OK LED Blinking Patterns...
  • Page 50 80 00 00 00 00 02 02 C1 8B 49 43 50 30 33 32 36 0x20: 30 30 31 59 03 00 81 00 00 00 00 04 00 09 02 FF Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 51 The show diag command displays similar information for each port available on the router. Table 3-2 lists problems that could occur with the WICs and VICs and the possible solutions of these problems. Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 52 Confirm that the Cisco IOS release installed in the router card. supports the WIC or VIC. Make sure you have a Cisco IOS feature set that supports voice. • The Cisco WAN Interface Cards Hardware Installation Guide lists the software requirements for each card.

  • Page 53: Troubleshooting The Power System

    Cisco reseller for warranty information. disconnected. Troubleshooting the Power System If the router external power supply fails, return it to your Cisco reseller. Table 3-3 lists symptoms and possible solutions of power problems. Table 3-3...

  • Page 54: Troubleshooting Isdn

    ISDN line between the router and the central office switch. Do this for each ISDN port installed in the router: Router# clear controller bri0 Router# clear controller bri1 Table 3-4 lists troubleshooting methods for ISDN-specific problems that might occur. Cisco 1751 Router Hardware Installation Guide 3-12 78-11258-04...
  • Page 55 Check with your ISDN service provider. Is the ISDN line If yes, the ISDN line might be connected to the card malfunctioning. Check with your ISDN U port? ISDN service provider. Cisco 1751 Router Hardware Installation Guide 3-13 78-11258-04...

  • Page 56: Fan Behavior

    Layer 3 status say “1 configurations. Active Layer 3 call”? Fan Behavior Under normal operation, the fan on the Cisco 1751 router is off. The fan turns on automatically, as required, to cool the system. Cisco 1751 Router Hardware Installation Guide 3-14...

  • Page 57: Appendix

    A P P E N D I X Technical Specifications Table A-1 lists hardware and operating specifications for the Cisco 1751 router. Table A-1 Router Specifications Description Specification Console port RJ-45 Auxiliary port RJ-45 Ethernet port RJ-45 Dimensions H x W x D 4 x 11.2 x 8.7 in.
  • Page 58 Technical Specifications Table A-1 Router Specifications (continued) Description Specification Operating Specifications Operating temperature 32 to 104°F (0 to 40°C) Storage temperature –40 to 149°F (–20 to 65°C) Operating humidity 10 to 85%, noncondensing Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 59: Appendix

    VIC Cables and Pinouts Cables and Pinouts for 2-Port ISDN BRI Card • For detailed information about cables used with Cisco WICs and VICs, refer to Note the Cisco WAN Interface Cards Hardware Installation Guide that comes with each of the cards.

  • Page 60: Ethernet Network Cabling Guidelines

    Table B-2 Ethernet Cabling Guidelines Specification 10BaseT 100BaseTX Maximum 100 meters 100 meters segment length Maximum number • With Class I of segments per repeaters: network With Class II • repeaters: Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 61: Console Cable And Adapters

    This table also includes pinouts for a DB-9-to-RJ-45 console adapter. Table B-3 Console Cable and Adapter Pinouts Console Console Console Terminal (DTE) Port Cable Adapter Adapter (DTE) Signal RJ-45 Pin RJ-45 Pin DB-9 Pin DB-25 Pin Signal Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 62 Figure B-1 Identifying a Rollover Cable Pin 1 on one connector and pin 8 on the other connector should be the same color. Pin 1 Pin 8 Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 63: Vic Cables And Pinouts

    Standard RJ-48S connector and cable to connect E&M VIC ports • (color-coded brown) to a PBX line. The cable wiring depends on the PBX type and connection. For details refer to the Cisco WAN Interface Cards Hardware Installation Guide. Figure B-2 shows how to connect the VICs to the network.
  • Page 64 –48V signaling battery M-lead Signaling input Ring, audio input R or R1 Ring, audio input/output, or output T or T1 Tip, audio input/output, or output Tip, audio input E-lead Signaling output Signaling ground return Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 65: Cables And Pinouts For 2-Port Isdn Bri Card

    TE Interface (use ISDN BRI NT/TE straight-through cable) crossover cable) Pin 3/T+ Pin 3/R+ Pin 3/T+ Pin 4/R+ Pin 4/T+ Pin 4/R+ Pin 5/R- Pin 5/T- Pin 5/R- Pin 6/T- Pin 6/R- Pin 6/T- Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 66 Appendix B Cabling Specifications Cables and Pinouts for 2-Port ISDN BRI Card Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 67: Appendix

    Before working on a system that has an on/off switch, turn off the power and Warning unplug the power cord. Before opening the chassis, disconnect the telephone-network cables to avoid Warning contact with telephone-network voltages. Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 68 During this procedure, wear grounding wrist straps to avoid ESD damage to the Warning router. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 69: Opening The Chassis

    Use the Phillips screwdriver to remove the four screws that hold the top and Step 3 bottom of the chassis together, as shown in Figure C-1 on page C-4. Turn the router back to its original position (right-side up). Step 4 Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 70 At this point, disconnect the fan, which is inside the top of the router chassis, from the motherboard. Do this by disconnecting the fan cable from the connector (labeled FAN) on the motherboard. Place the router bottom on an antistatic mat and begin installing memory. Step 6 Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 71: Locating Modules

    (DIMM) and packet voice data modules (PVDMs) on the motherboard. Figure C-2 Cisco 1751 Motherboard—Module Locations WIC/VIC slot 1 (top) VIC slot 2 Fan connector WIC/VIC slot 0 (bottom) PVDM slot DIMM slot Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 72: Installing A Dual In-Line Memory Module

    Step 5 move up and over the end of the DIMM, as in Figure C-3. If the guides do not move up over the edge of the DIMM, move them with your hands. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 73: Installing A Packet Voice Data Module

    • Each DSP supports two analog voice ports or one ISDN BRI port. Each analog VIC used with the Cisco 1751 router has two voice ports and requires a single DSP. The 2-port ISDN Voice-BRI requires two DSPs. Table C-1 shows the possible combinations of PVDMs and voice ports for the Cisco 1751 router.
  • Page 74 Step 3 Insert the PVDM into the PVDM slot, making sure that the notches on the edge Step 4 of the PVDM are inserted over the bars inside the PVDM slot. (See Figure C-4.) Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 75: Closing The Chassis

    Be careful not to damage the router motherboard with the posts. Replace the screws that you removed when opening the chassis. (See Figure C-1.) Step 4 Cisco 1751 Router Hardware Installation Guide 78-11258-04...
  • Page 76 Appendix C Installing and Upgrading Memory and Packet Voice Data Modules Closing the Chassis Figure C-5 Closing the Chassis V I C T IO V I C T IO Cisco 1751 Router Hardware Installation Guide C-10 78-11258-04...

  • Page 77: Appendix

    VPN module. Read this section before installing the VPN module in a Cisco 1751 router. Tools and Equipment Required The following items are required to install the VPN module: Number 1 Phillips screwdriver • VPN module and associated parts • Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 78: Vpn Module Parts

    Warning Read the installation instructions before you connect the system to its power source. Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 79: Preventing Electrostatic Discharge Damage

    ESD voltages on the body; ESD voltages on clothing can still cause damage. Handle printed circuit cards by the edges only; avoid touching the • components, traces, or any connector pins. Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 80: Installing The Vpn Module In A Cisco 1751 Router

    Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. Installing the VPN Module in a Cisco 1751 Router This section describes how to install the VPN module in a Cisco 1751 router. It contains the following sections: Opening the Cisco 1751 Chassis •...
  • Page 81 Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Figure D-1 Removing the Cisco 1751 Chassis Screws Number 1 Phillips screwdriver C i s Rear panel Top of router Turn the router back to its original position (top up).

  • Page 82: Installing The Vpn Module

    Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Place the router bottom on an antistatic mat and begin installing the VPN module. Step 6 Installing the VPN Module Follow the steps in this section to install the VPN module.
  • Page 83 Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Figure D-3 Securing the Standoff to the 1751 Motherboard Locate the VPN module socket and insert the VPN module, as shown in Step 3 Figure D-4.
  • Page 84 Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Figure D-4 Cisco 1751 Motherboard—VPN Module Location Step 4 Pushing down with both thumbs as shown in Figure D-5, plug the VPN module into the socket.
  • Page 85 Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Figure D-5 Seating the VPN Module Using the two remaining screws, secure the standoffs to the VPN module. Step 5 Closing the Cisco 1751 Chassis...
  • Page 86 Appendix D Installing the Virtual Private Network Module Installing the VPN Module in a Cisco 1751 Router Figure D-6 Closing the Cisco 1751 Chassis V I C T IO V I C T IO Cisco 1751 Router Hardware Installation Guide...

  • Page 87: Appendix

    Cisco 1751 router. Multiflex Trunk Interface Cards The following multiflex trunk interface cards on the Cisco 1751 support hardware-based echo cancellation features through an optional echo canceler expansion module installed on the main board of the interface card: 1-Port RJ-48 Multiflex Trunk T1/E1—VWIC2-1MFT-T1/E1, with...

  • Page 88: Echo

    Appendix E Installing the Echo Canceler Expansion Modules on Cisco Interface Cards Echo Echo occurs when the speech energy being generated and transmitted down the signal path is coupled into the receive path from the far end. This causes a speaker to hear the sound of his or her own voice, delayed by the total echo path delay time.

  • Page 89: Installing And Configuring The Echo Canceler Expansion Modules

    Appendix E Installing the Echo Canceler Expansion Modules on Cisco Interface Cards The following echo canceler expansion modules are available for voice-only support on the 1-port RJ-48 multiflex trunk T1/E1 (VWIC2-1MFT-T1/E1) and on the 2-port RJ-48 multiflex trunk T1/E1(VWIC2-2MFT-T1/E1) interface cards on the Cisco 1751 router.
  • Page 90 Appendix E Installing the Echo Canceler Expansion Modules on Cisco Interface Cards Cisco 1751 Router Hardware Installation Guide 78-11258-04...

  • Page 91: I N D E X

    C-9, A-9 command conventions commands clear controller 3-12 clear interface 3-12 cables config-register 2-port ISDN BRI card configure terminal and rear-panel LEDs copy console 2-10, B-3 dialer map 3-14 Ethernet 2-3, B-1 Cisco 1751 Router Hardware Installation Guide IN-1 78-11258-04...
  • Page 92 E-1, E-2 featured 1-3, 1-5 enable command illustrated enable password, recovering specifications enable-secret password, recovering contacts, Cisco and reseller equipment, required 1-11 conventions ETH ACT LED command ETH COL LED text Ethernet cable Cisco 1751 Router Hardware Installation Guide IN-2 78-11258-04...
  • Page 93 1-10 front panel WAN interface cards illustrated interface cards, featured LEDs FXO VIC port see also Flash memory FXS VIC port ISDN, troubleshooting 3-12 Cisco 1751 Router Hardware Installation Guide IN-3 78-11258-04...
  • Page 94 DRAM Flash OK LED locating on router description overview 1-10 diagnostics installing and upgrading opening chassis C-3, A-4 router operating specifications modem organization, this document connecting to router 2-11 required 1-12 support Cisco 1751 Router Hardware Installation Guide IN-4 78-11258-04...

  • Page 95: Ethernet Cables B

    FXO VIC connecting to power FXS VIC installation rear panel memory power socket resetting connecting specifications description unpacking 1-11, ?? to 1-11 illustrated wall-mounting 2-13 problem solving specifications troubleshooting 3-11 Cisco 1751 Router Hardware Installation Guide IN-5 78-11258-04...
  • Page 96 ISDN 3-12 wall-mounting 2-13 OK LED WAN interface cards password recovery installing power system 3-11 problem solving WICs and VICs required 1-11 router slots supported cards Cisco 1751 Router Hardware Installation Guide IN-6 78-11258-04...
  • Page 97 Index troubleshooting WIC/VIC slot World Wide Web address Cisco 1751 Router Hardware Installation Guide IN-7 78-11258-04...
  • Page 98 Index Cisco 1751 Router Hardware Installation Guide IN-8 78-11258-04...

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