Cisco Systems 7300-6T3 User Manual

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

Product Numbers: 7300-6T3 Platform Supported: Cisco 7304

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

Text Part Number: OL-3449-02

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS M ANUAL ARE SUBJECT TO CHA NGE WITHOUT NO TICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSI BILITY FOR THEIR APPLICA TION OF ANY PRODUCT S.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORT H IN THE INFORMATION PACKET T HAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accor dance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency ener gy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisc o’s writ ten author ization m ay resul t in the equi pment no lo nger comp lyi ng with FCC requi rements for Class A or Class B digital devices. In that event, your right to use the equ ipment may be limit ed by FCC regul ations , and you may be requir ed to correct a ny interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interferen ce stops, it was probably caused by the Cis co equipm ent 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:

• Turn the television or radio antenna unt il the int erference st ops.

• Move the equipment to one side or the other of the televisio n or radi o.

• Move the equipment farther away from the te levision or radio.

• Plug the equipment into an outlet that is on a di fferent cir cuit from the televi sion o r radio. (That is, make certain th e equipment and the te levision or radio are on circuit s controlled by different circuit breaker s or fuses.)

Modifications to this product no t author ized by Cis co Syst ems, Inc. coul d voi d the FCC appro val and ne gate your authorit y to op erate the pr oduct. The Cisco implementation of TCP head er compressi on is an adap tation of a program developed by the Universi ty of Ca lifornia, Berk eley (UCB) as part of UCB ’s public

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IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING , WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE S.

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All other trademarks mentioned in this document or Web site are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0304R)

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

Preface vii

Objectives vii Organization vii Related Documentation viii Obtaining Documentation viii

Cisco.com viii Documentation CD-ROM ix Ordering Documentation ix Documentation Feedback ix

Obtaining Technical Assistance x

Cisco.com x Technical Assistance Center x

Cisco TAC Website xi Cisco TAC Escalation Center xi

CHAPTER

Obtaining Additional Publications and Information xi

1 Overview 1-1

Line Card Overview 1-1 Features 1-2 Interoperability Guidelines for 6T3 Line Card DSUs 1-3

Maintenance Data Link Messages 1-3 LEDs 1-3 T3 SMB Cables 1-4

Ordering Cables 1-6

Building Your Own Cables 1-6 Management Information Base 1-7 Line Card Slot Locations on the Supported Platform 1-7

Cisco 7304 Router Slot Numbering 1-8 Identifying Interface Addresses 1-9

Cisco 7304 Router Interface Addresses 1-9

CHAPTER

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2 Preparing for Installation 2-1

Required Tools and Equipment 2-1

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iii

Contents

Software and Hardware Requirements 2-2 75-Ohm In-Line Coaxial Attenuator (Optional) 2-2 Safety Guidelines 2-2

Safety Warnings 2-2 Warning Definition 2-3 Electrical Equipment Guidelines 2-7 Telephone Wiring Guidelines 2-8 Preventing Electrostatic Discharge Damage 2-8

CHAPTER

3 Removing and Installing Line Cards 3-1

Installation Overview 3-1 Handling Line Cards 3-2 Online Insertion and Removal 3-2 Warnings and Cautions 3-3 Line Card Removal and Installation 3-3

Cisco 7304—Removing and Installing a Line Card 3-4

Connecting a T3 SMB Cable 3-5

4 Configuring the 6T3 Line Card 4-1

Using the EXEC Command Interpreter 4-1 Configuring the Interfaces 4-2

Shutting Down an Interface 4-2 Performing a Basic Configuration 4-4 Customizing the 6T3 Line Card Configuration 4-6

Verifying Local and Remote DS3 Port Settings 4-6 Selecting a DSU Mode 4-6 Setting the Sending and Receiving Rate 4-7 Configuring th e DSU Bandwidth Range 4-7 Enabling Payload Scrambling 4-7 Configuring Cyclic Redundancy Check s 4-7 Configuring the Clock Source 4-8 Defining the DSU Mode 4-8 Enabling T3 Scrambling 4-9 Specifying T3 Fra m ing 4-9 Setting the Cable Length 4-9

Checking the Configuration 4-9

Using show Commands to Ver ify the New Interface Status 4-10

Using the show versi on or show hardware Commands 4-11

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Using the show diag Command 4-12

Using the show interfaces Command 4-13 DS3 Alarm and Event Detection 4-14 Using the ping Command to Verify Network Conne ctivity 4-15 Using loopback Commands 4-15 Bit Error Rate Te st in g 4-17

CLI-Controlled OIR 4-17 Line Card Crash Recovery 4-17

Contents

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Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

Contents

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

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Preface

This preface desc rib es t he ob j ect ives and organiza tio n o f th is docu me nt a nd expla ins how to find additional information on related products and services. This preface contains the following sections:

• Objectives, pagevii

• Organization, page vii

• Related Document ation , page vii i

• Obtaining Documentation, page viii

• Obtaining Technical Assistance, page x

Objectives

This document describ es how to install and co nfigure the clear chan nel 6-por t T3 (DS3) lin e card (7300-6T3[=]), hereafter referred to as the 6T3 line card, which is used in the Cisco 7304 router.

Organization

This document contains the following chapters:

Section Title Description

Chapter 1 Overview Describes the 6T3 line card and its LED

Chapter 2 Preparing for Installation Describes safety considerations, tools required,

Chapter 3 Removing and Installing Li ne Cards Describes the procedures for installing and

Chapter 4 Configuring t he 6T3 Line Car d Provides instructions for configuring the 6T3

• Obtaining Additional Publications and Information, page xi

displays, cables, and recept acles.

and procedures you sh ould pe rform before the actual installation.

removing the 6T3 line card in the supp orted platform.

line card on the supp orte d p lat form .

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vii

Obtaining Documentation

Cisco provides several ways to obtain documentation, techn ical assistance , and other tec hnical resources. These se ction s expl ain how to obt ai n tec hnic al infor mati on from Cisc o Sy stem s.

Cisco.com

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

viii

You can acc ess t he m ost c ur rent C isco doc um ent ation on the World Wide Web at thi s UR L:

http://www.cisco.com/univercd/home/home.htm

You can access the Cisco website at this URL:

http://www.cisco.com

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Preface

International Cisco websites can be accessed from this URL:

http://www.cisco.com/public/countries_languages.shtml

Documentation CD-ROM

Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which may have shipped with your product. The Documentation CD-ROM is updated regularly and may be more curre nt than printed do cumentati on. The CD-R OM packag e is av ailable as a single unit or through an an nua l o r q uart erly subsc rip tio n.

Registered Cisco.com u sers c a n orde r a sing l e Do cume nta tio n CD- ROM (product num be r DOC-CONDOCCD=) through the Cisco Ordering tool:

http://www.cisco.com/en/US/partner/ordering/ordering_plac e_order_or dering_ tool_launch. html

All users can order monthly or qua rterly subscri ptions thr ough the onli ne Subscript ion Store:

http://www.cisco.com/go/subscription

Obtaining Documentation

Ordering Documentation

You can find ins tr uct ions for orde ring do cu me nta tion a t t his U RL:

http://www.cisco.com/univercd/cc/td/doc/es_in pck/pdi.htm

You can order Cisc o documen tation in th ese ways:

• Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from

the Networking Produ cts Market Pla ce:

http://www.cisco.com/en/US/partner/ordering/index.shtml

• Nonregistered Cisco.co m u ser s can o rd er docum en tati on th rou gh a l oc al ac count r epre sen tative by

calling Cisco Systems Corpo rate Headqu arter s (Califo rnia, U.S.A. ) at 408 526-7208 or, elsewhere in North America, by calli ng 800 55 3-NE TS (6387).

Documentation Feedback

You can submit co mm ents el ec troni call y on Cisc o.com . On the Cisco D ocume nta tio n home pag e, click Feedback at the top of the page.

You can e-ma il your co mmen ts to bug-doc@c isco.c om. You can submit c ommen ts by using the respon se card (if prese nt) behind t he front cover of your

document or by wri ting t o the fo llowing a ddress: Cisco Systems

Attn: Customer Docume nt Ordering 170 West Tasman Drive San Jose, CA 95134- 988 3

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We appre ciat e your co mmen ts.

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

Obtaining Technical As sistance

Obtaining Technical Assistanc e

Cisco provides Cisco.com , w hich incl udes the Ci sco Technical Assistance Cent er ( TAC) website, as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sampl e configurations fro m the Cisco TAC website. Cisco.com registered users have complete access to the tec hnical su pport resources on th e Cisco TAC website, including TAC tools and utilities.

Cisco.com

Cisco.com offers a suite of in tera ct ive, networked serv ices t hat le t y ou acc ess Ci sco in for mat ion, networking solutions, services, pr ogram s, and re sources at any time, from anywhe re in the world.

Cisco.com provides a br oad r ange of fea tur es an d s er vice s to h elp you wi th th ese ta sks:

• Streamline business processes and improve productivity

• Resolve technical issues with online support

• Download and te st so ft war e pa ck ag es

• Order Cisco learning m ateri als and me rcha ndise

Preface

• Register for online skill assessment, training, and certification programs

To obtain customized information and service, you can self-register on Cisco.com at this URL:

http://tools.cisco.com/RPF/register/register.do

Technical Assistance Center

The Cisco TAC is available to all customers who need technical assistan ce with a Cisco product, technology, or solution. Two types of support are available: the Ci sco TAC website and the Cisco TAC Escalation Center. The type of support that you choose depends on t he priorit y of the proble m and the conditions stated in service contracts, when applicable.

We ca tegoriz e Ci sco TAC inquiries according to urgency:

• Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities,

product installation, or basic produc t con figuration. There is little or no imp act to yo ur business operations.

• Priority level 3 (P3)—Operational performanc e of t he ne twork i s im pai red , but mo st business

operations remain functional. You and Cisco are willing to commit resources during normal business hours to restore service to satisfactory levels.

• Priority level 2 (P2)—Operation of an existing network is severely degraded, or significant aspects

of your business operations are negatively impacted by inadeq ua te pe rform an ce of Cisc o pro duct s. You and Cisco will co mmit ful l-tim e resource s during nor mal business hours to resolve the situation.

• Priority level 1 (P1)—An existing network is “down,” or there is a critical impact to your business

operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

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Preface

Cisco TAC Website

The Cisco TAC website provides online documents and tools to help troubleshoot and resolve technical issues with Cisco products and technologies. To access the Cisco TAC website, go to this URL:

http://www.cisco.com/tac

All customers, partners, and resellers who have a valid Cisco service contract have complete access to the technical support resources on the Cisco TAC website. Some services on the Cisco TAC website require a Cisco.co m login ID and password. If you have a valid service contract but do not have a login ID or password, go t o th is URL to register :

http://tools.cisco.com/RPF/register/register.do

If you are a Cisco.com registere d user, and you cannot resol ve your tech ni cal issues by using the Cisco TAC website, you can open a case online at this URL:

http://www.cisco.com/tac/caseopen

If you have Internet acc ess , we re com mend tha t y ou open P3 and P4 case s onl ine so that y ou ca n fu lly describe the situation and attach any necessary files.

Cisco TAC Escalation Center

Obtaining Additional Publications and Information

The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.

To obt a in a dir ect or y o f t oll- free C isco TAC telephone numbers for yo ur co unt r y, go to this UR L:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

Before calling, please check with your network operations center to d etermine the Cisco support services to which your company is entitled: for example, SMARTnet, SMARTn et Onsite, o r Ne tw ork Supp orte d Accounts (NSA). When you call the center, please have available your service agreement number and your product seria l nu mb er.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

• The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as

ordering and custome r support ser vices. Access the Cisco Product Catalog at this URL:

http://www.cisco.com/en/US/products/products_catalog_links_launch.html

• Cisco Press publishes a wid e ran ge of n etworki ng pub l icatio ns. Cisco suggest s the se t itle s for new

and experienced users: Internetworking Terms and Acronyms Dictionary, Internetworking Technology Hand boo k, I ntern etwo rkin g Troubleshooting Guide, and the Inter netw ork ing D esign Guide. For current Cisco Press titles and other information, go to Cisco Press online at this URL:

http://www.ciscopress.com

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Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

Obtaining Additiona l Publications and Informatio n

• Packet magazine is the Cisco quarte rly public ation that provides the la test networking trends,

technology breakthrough s, and Cisco products an d solutions t o help ind ustry professi onals ge t the most from their networking investment. Included are networking depl oyment an d troublesho oting tips, configuration e xamples, customer case studies, tutorials and train ing, certificatio n information, and links to numerous in-de pth online resour ces. You can access Packet ma gazine at this U RL:

http://www.cisco.com/go/packet

• iQ Magazine is the Cisco bimonthl y publica tion that de livers the latest informat ion about Int ernet

business strategies for executives. You can access iQ M agazin e at th is URL :

http://www.cisco.com/go/iqmagazine

• Internet Protocol Journa l is a quarterly jour nal publ ished by Cisco Systems for engineering

professionals involved in designing, developing, and ope ratin g p ubli c a nd pr ivate internets a nd intranets. You can access the Internet Protocol Journal at this URL:

http://www.cisco.com/en/US/about/ac123/ac147/about_cisco_the_internet_protocol_journal.html

• Training—Cisco offers world-class networking training. C urrent offerings in ne twork traini ng are

listed at this URL:

http://www.cisco.com/en/US/learning/le31/learning_recommended_training_list.html

Preface

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CHAPTER

Overview

This chapter describes the 6T3 line card and contains the following sections:

• Line Card Overview, page 1-1

• Features, page 1-2

• Interoperability Gui del ine s f or 6T3 L i ne Ca rd DSU s, pa ge 1 -3

• LEDs, page 1-3

• T3 SMB Cables, page 1-4

• Management Informat ion Base, page 1-7

• Line Card Slot Loc ation s on the Su ppo rted Pl at form, page 1-7

• Identifying Interface Addresse s, page 1-9

Line Card Overview

The 6T3 line card provides a full-duplex operation at T3 (45 Mbps) speed. It supports both 16- and 32-bit cyclic redundancy checks (CRCs); the default is 16-bit CRC. You can change the default setting with software commands.

The 6-port 6T3 line card , shown in Figure 1-1, provides up to 24 network interfaces per Cisco 7304 router.

Figure 1-1 6T3 Line Card

7300-6T3

OIR

STATUS

6-PORT T3 DSU

LNK

66771

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Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

1-1

Features

Chapter 1 Overview

The 6T3 line card provides the following features:

• Single-wide line ca rd for t he Cisco 73 04 ro uter

• Full-duplex synchronous serial DS 3 interface

• High-Level Data Link Control (HDLC) data

• Integrated data serv i ce u nit (DS U) fu nctio na lity

• Support for 16- and 32-bit cyclic redundancy ch ecks (CR Cs)

• Support for Frame Relay, HDLC, and PPP serial encapsulations

• Support for DS3 MIB (RFC 1407)

• Support for remote and local loopb acks

• Six independent T3 port s

• Subrate DS3 support for Cisco , Kentrox, Larsco m, and Di gital Link format s along wit h the

associated scrambling. In so me m ode s, the scram bling is op tional.

• Clear-channel DS 3 (f rame d but un ch an neli z ed)

• M23 and C-bit-pari ty DS3 fr ame fo rmats

• Extraction of BOCs on the C -bit far-end a la rm a nd co ntro l (FE AC) code

• Detects and co un ts r e mote a lar m indi cati on (R AI ), par ity e rro rs, far-en d b lo ck err or (FE BE ), li ne

code violation (LCV), loss of light (LOL), out of frame (OOF), framing errors, loss of frame (LOF), loss of signal (LOS)

• One-second perform ance mon itoring co unters

• Generates AIS and FEAC

• Generates F-, X-, P-, and M-bit errors; LCVs; all zeros; RAI; and FEBE f or testing

• Line, payload, and d iagn osti c l oop backs

• One bicolor LED per T 3 por t

• Drives up to 900 feet of 7 5-o hm c oaxi al cabl e RG - 59U or eq uivalent, 450 feet to D SX -3

demarcation point (DSX)

• 75-ohm SMB-type coa xia l c onn ect ions over ATT 734/728, 75-ohm coaxial ca ble

• B3ZS line coding

• Maintenance data link ( MDL) messages

• Bit error rate testing

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Chapter 1 Overview

Interoperability Guidelines for 6T3 Line Card DSUs

The 6T3 line card support s several types of integrated data ser vice unit s (DSUs). Table 1-1 lists the feature compatibilities of 6T3 line card DSUs.

Table 1-1 Feature Compatibilities of 6T3 Line Card DSUs

Full Rate

DSU

Support

Adtran Yes No Yes No DL3100 Yes Yes Yes No Kentrox Yes Yes Larscom Yes Yes Yes No

1. MDL (Maintenance Data Link)

2. The 6T3 line card supports scrambling and Kentrox subrate at the same time.

Maintenance Data Link Messages

T3 maintenance data link (MDL) messages are used to communicate iden tific ation informati on between local and remote ports. T he type of in format ion inclu ded in MDL me ssages inc ludes the eq uipmen t identification co de (EIC) , loc ation iden tification code (LIC), frame identification code (FIC), unit, Path Facility Identificati on (PFI ), po rt n umb er, and G ene ra tor Ide ntifica tio n num be rs. T he values f or ea ch piece of MDL message identification can be defined only by a network administ rator and are discussed in ANSI T1.107.

For information on transporting M DL messag es betwee n source and destinat ion T3 ports on a Cisco 7304 router, refer to T3 Maintenanc e Data Link Message s on the Cisco 7304 Router.

Scrambling Support

Subrate Support MDL1 Support

Yes

LEDs

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The 6-port 6T3 line card has six LNK LEDs , one for each port, as well as one OI R LED and one STATUS LED. (See Figure 1-2.)

Figure 1-2 LEDs on t he 6T3 Line Card

7300-6T3

OIR

STATUS

6-PORT T3 DSU

LNK

After system initialization, the STATUS LED goes on to indicate that power is received and that the 6T3 line card is enabled for operation.

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T3 SMB Cables

Chapter 1 Overview

The following conditions must all be met before the 6T3 line card is enabled:

• The 6T3 line card is correctly connected and receiving power.

• The Network Services Eng ine 100 (N SE-100 ) recogni zes the 6T 3 line card .

• The Cisco IOS image on the NSE- 100 is runnin g.

If any one of th ese conditions is not met, or if the initialization fails, the STATUS LED does not go on.

Table 1-2 lists 6T3 line card LED co lors and indications.

Table 1-2 6T3 Line Card LEDs

LED Label Color State Meaning

OIR Green On Line card is ready to be removed in

CLI-controlled OIR.

Off Line card is online.

STATUS Green/Yellow Green Indicates line card is online.

Yellow Indicates line card bootstrapping is in progress. Off Indicates lin e card is offlin e or deactivated.

LNK Green/Yellow Green Line card port is enabled.

Yellow Line card port is in loopback m ode or i s r eceiving

or transmitting alarms.

Off Line card por t i s disab led.

T3 SMB Cables

The cables used to connect the 6T3 line card are presented in the following sections:

• Ordering Cables, pa ge 1 -6

• Building Your O wn Cabl es, p ag e 1- 6

We re comme nd usin g six T3 SMB cab les. The cables are 10 feet (3.0 48 meter s) long and have two female SMB connectors on one end, and two female or male bayonet coupling (BNC) connectors on the other end. Use the female SMB cable connectors to connect the local line card RX and TX ports. Use the BNC cable connectors to connect the line card RX and TX ports to other devices. See Figure 3-2.

Note Cisco does not automatically provide the six T3 SMB cables recommended for your 6T3

line card.

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Chapter 1 Overview

T3 SMB Cables

Figure 1-3 T3 SMB Cables (SMB Terminates into BNC)

70005

SMB connector Female BNC

Male BNC

connector

Note Electromagnetic compliance (EMC) was verified with the 10-foot (3.048 meters) shielded cables that

are orderable thr ough Cisc o. We recommend tha t you u se only the 1 0-f oot (3.048 m ete rs) shie lde d T3 SMB cables; othe rwi se, E M C is not gua rant eed .

If you use cables other than those ordered from Cisco, it is your responsibility to ensure that you ha ve a compliant system that meets local EMC requirements. To order additional cables, use the product numbers: 2CBLE-SMB-BNC-M (ma le) and 2CBLE-SMB-BN C-F (female).

Note When you connect the 10-foot (3.048 meters) shielded T3 SMB cables to the 6T3 line card,

be careful not to be nd the m ale ca ble conn ec tor pi n w he n you c onn ect or dis con nect the cables. Observe the receive (RX) and tra nsmit (T X) cabling re lation ship shown in

Figure 1-4.

Figure 1-4 Connecting T3 SMB Cables

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7300-6T3

OIR

STATUS

6-PORT T3 DSU

LNK

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+ 37 hidden pages

Cisco Systems 7300-6T3 User Manual

Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration

CONTENTS

Preface

Objectives

Organization

Related Documentation

Obtaining Documentation

Cisco.com

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical As sistance

Cisco.com

Technical Assistance Center

Cisco TAC Website

Cisco TAC Escalation Center

Obtaining Additional Publications and Information

Overview

Line Card Overview

Features

Interoperability Guidelines for 6T3 Line Card DSUs

Maintenance Data Link Messages

LEDs

T3 SMB Cables