Alcatel OmniAccess 780 Service Manual

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OmniAccess 780

Hardware Users Guide

1

Notes on numbered items on banner & legal pages

1

US Customer Support—[phone]

Release 2.2

26801 West Agoura Road

Calabasas, CA 91301

[phone]

FAX [phone]

[e-mail]

2

International Customer Support—[phone]

Beta

Internet—service.esd.alcatel-lucent.com

Website: www.alcatel-lucent.com

Part No: 032289-00, Rev. A

3
4

5

Copyright

The Specifications and Information regarding the products in this manual are subject to change without
notice. 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 responsibility
for their application of any products.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET
FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED
HEREIN BY THIS REFERENCE.

This equipment has been tested and found to comply within the limits pursuant to the (Centre for
Telecom) rules. These limits are designed to provide protection against harmful interference when the
equipment is operated in a commercial environment.

The following information is for the Users of the OmniAccess 780: If it is not installed in accordance with
the installation instructions, it may not function exactly to the said specifications. Modifyi ng the
equipment without Alcatel-Lucent's written authorization may result in the equipment no longer
complying with the said dimensions.

Copyright © 2007, Alcatel-Lucent. All rights reserved.

Not withstanding any other warranty herein, all hardware and software are provided "as is" with all
faults. Alcatel-Lucent disclaim all warranties, expressed or implied, including, without limitation, those
of merchantability, fitness for a particular purpose and non-infringement or arising from a course of
dealing, usage, or trade practice. In no event shall Alcatel-Lucent 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 u se this manual, even if Alcatel-Lucent have been advised of the
possibility of such damages.

Table of Contents

1 Preface............................................................................................................ 3

About This Guide ......................................................................................................................3

Chapter Description ..................................................................................................................3

Audience...................................................................................................................................3

Document Organization ............................................................................................................4

Document Conventions.............................................................................................................4

Obtaining Documentation..........................................................................................................5

Reference Publications.............................................................................................................5

Obtaining Technical Assistance................................................................................................5

Documentation Feedback.........................................................................................................5

2 OmniAccess 780 Overview........................................................................... 7

Introduction ...............................................................................................................................7

OA-780 Overview......................................................................................................................8

Package Contents.....................................................................................................................8

Hardware Overview...................................................................................................................9

The OA-780........................................................................................................................9

User Modules ...................................................................................................................16

System Specifications.............................................................................................................31

Valid System Configuration ..............................................................................................32

3 Installing the OmniAccess 780................................................................... 33

Preparing for Installation.........................................................................................................34

Required Tools and Equipment........................................................................................34

Installation Checklist ...............................................................................................................35

Safety Measures .....................................................................................................................36

Preventing Injury...............................................................................................................36

Equipment Guidelines ......................................................................................................36

Lifting Safely.....................................................................................................................37

Safety With Electricity.......................................................................................................38

Preventing Electrostatic Discharge Damage....................................................................39

Site Requirement Guidelines..................................................................................................40

Power Supply Overview..........................................................................................................41

Power Supply Specifications ............................................................................................41

Plant Wiring......................................................................................................................43

General Installation.................................................................................................................44

Rack-Mounting the OA-780.....................................................................................................45

Parts Required..................................................................................................................46

Installing the OA-780 in the Rack.....................................................................................47

Installing User Modules...........................................................................................................48

Installing Switch Fabric.....................................................................................................48

Installing Line Cards.........................................................................................................49

Installing Fan Tray............................................................................................................51

Installing Power Tray........................................................................................................52

Installing Fillers.................................................................................................................53

4 Starting the OmniAccess 780......................................................................55

Introduction .............................................................................................................................55

Checking Conditions Prior to System Startup.........................................................................56

Starting the OA-780 ................................................................................................................56

Connecting to the System Console Port.................................................................................59

Performing Basic Configuration Tasks....................................................................................61

Accessing OA-780 Through CLI.......................................................................................61

Connecting the System to the Network...................................................................................67

Connecting Through the Internal Network........................................................................67

Connecting Through External Network.............................................................................70

Site Log...................................................................................................................................71

Appendix A Regulatory Compliance and Safety Information..........................1

Declaration of Conformity: CE Mark..........................................................................................1

Waste Electrical and Electronic Equipment (WEEE) Statement ........................................2

China RoHS: Hazardous Substance Table...............................................................................3

Standards Compliance..............................................................................................................5

Safety .................................................................................................................................5

EMC....................................................................................................................................5

Telecom..............................................................................................................................5

Declaration of Conformity Addendum.................................................................................6

FCC Class A, Part 15 .........................................................................................................7

Canada Class A Statement................................................................................................8

JATE...................................................................................................................................8

CISPR22 Class A warning..................................................................................................8

VCCI...................................................................................................................................8

Class A Warning for Taiwan and Other Chinese Markets..................................................9

Translated Safety Warnings....................................................................................................10

Instrucciones de seguridad en español...................................................................................16

Appendix B AC Power Specifications..............................................................19

Appendix C Pin Connector Details for OmniAccess 780...............................21

RJ-11 Modem Connector Pin Assignments......................................................................21

RJ-45 Console Connector Pin Assignments ....................................................................22

T1E1 Connector Pin Assignments....................................................................................23

SE/L2GE Connector Pin Assignments.............................................................................24

Serial Card (V.35/X.21) Connector Pin Assignments.......................................................25

List of Figures

The OA-780 Chassis 10
Air Flow Through the OA-780 11
Front Panel 12
Rear Panel 12
OA-780 (8-Slot Chassis) 13
Switch Fabric 16
Services Engine 17
4-port T1E1 Line Card 19
GigE Line Card 21
Serial Line Card (V.35/X.21) 24
Fan Tray 27
Ports on Fan Tray 28
Power Tray 30
Connecting Power Cord 42
Rack Mounting the OA-780 47
Installing Switch Fabric 48
Installing Services Engine 49
Installing Line Cards 50
Installing Fan Tray 51
Installing Power Tray 52
Connecting to the System Console 59
Connecting to Internal Network 68
Connecting through External Network 70
RJ-11 Connector 21
RJ-45 Connector 22
Serial Card (V.35/X.21) Connector 25

List of Tables

OA-780 Chassis Physical Specifications 11
Slot Numbers 13
LED Status Table 14
Cable Connections Table 15
Switch Fabric LEDs 16
SE Card LEDs 18
LEDs for Ethernet Port on SE Card 18
T1/ E1 Card LEDs 20
T1/ E1 Port LEDs 20
T1E1 Mode LEDs 21
GigE Card LEDs 22
LEDs for each Port on GigE Card 22
Serial Card (V.35/X.21) LEDs 25
Serial (V.35/X.21) Port LEDs 25
Serial Card (V.35/X.21) Cable Part Numbers 26
Fan Tray LEDs 29
Environmental Specifications 31
Power Specifications 31
Physical Specifications 31
Valid System Configuration 32
Environmental Site Requirements 40
LED Status 57
Console Properties 60
AC Power Supply Specifications 19
Pin Connector Details for RJ-11 Connector 21
Pin Connector Details for RJ-45 Connector 22
T1/E1 Card Port Connector Pin Assignment 23
10/100/1000 Mbps Port Connector Pin Assignment on SE/L2GE Card 24
Pin Connector Details for Serial Line Card 25

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CHAPTER 1

PREFACE

ABOUT THIS GUIDE

This hardware users guide explains the initial hardware installation and
configuration procedures for the OmniAccess 780 (OA-780). It contains
procedures for unpacking and installing the OA-780 hardware, starting up the
system, and creating a basic configuration. After completing the installation and
basic configuration procedures covered in this guide, use the appropriate
companion publications to completely configur e you r syste m.

CHAPTER DESCRIPTION

This chapter explains the objectives, intended audience, and organization of the
OA-780 Hardware Users Guide, and defines the conventions used to convey
instructions and information.

AUDIENCE

This book is intended for networking professionals who are responsible for
designing, implementing, and managing enterprise networks. This book aims to
provide unique technologies and effective practices that deliver value on the
networking perspective.

The user is expected to have, at minimum, an introductory understanding of the
following:

• Networking applications

• Telecommunication networks

• Hardware configuration

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DOCUMENT ORGANIZATION

This hardware users guide is organized into the following chapters and appendix:

Chapter 2 OmniAccess 780 Overview describes the functional description of
the OA-780 and provides a functional overview of the system.

Chapter 3 Installing the OmniAccess 780 is a preparatory chapter that
describes safety considerations, tools required, an overview of the installation,
and hardware installation procedures.

Chapter 4 Starting the OmniAccess 780 provides procedure for starting the
OA-780 and performing basic configuration tasks, and connecting the system to
the internal and external networks.

Appendix Provides additional information on the regulatory compliances and
safety, AC power supply, an d Pin Connector details for the OA-780.

DOCUMENT CONVENTIONS

The following conventions are used to attract the attention of the reader:

Note: Means reader take note. Notes contain helpful suggestions/information/references to

materials. Take a note of instructions provided here.

Caution: Means reader be careful. Failure to observe the cautionary note could result in

equipment damage or loss of data.

Safety Warnings:

Warning: FOLLOW THE IMPORTANT SAFETY INSTRUCTIONS.

Means reader be extremely cautious. Failure to observe th e warning note could result
in injury to the user, equi pment damage, and/or loss of data.

This warning means danger. You are in a situation that could cause bodily injury.
Before you work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for preventing accidents.

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OBTAINING DOCUMENTATION

Alcatel-Lucent provides several ways to obtain technical assistance and other
technical resources. Documents can be downloaded from our support site
service.esd.alcatel-lucent.com

REFERENCE PUBLICATIONS

The following publications are part of the Alcatel-Lucent documentation suite:

• OmniAccess 700 CLI Command Reference Guide (Release 2.2)

• OmniAccess 700 CLI Configuration Guide (Release 2.2)

• OmniAccess 700 Web GUI Users Guide (Release 2.2)

• OmniAccess 700 Getting Started Guide (Release 2.2)

• OmniAccess 740 Hardware Users Guide (Release 2.2)

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Obtaining Documentation

OBTAINING TECHNICAL ASSISTANCE

For all customers, partners, resellers, and distributors who hold valid
Alcatel-Lucent service contracts, the Alcatel-Lucent Technical Support Team
provides 24-hour-a-day, technical support services online and over the phone.

For Customer issues and help, contact:
Alcatel-Lucent
US Customer Support: [phone]
International Customer Support: [phone]
E-mail: [e-mail]
Website: service.esd.alcatel-lucent.com

DOCUMENTATION FEEDBACK

We value your comments and suggestions about our documentation. If you have
comments about this book, please enter them through the feedback link on the
Alcatel-Lucent Website. We will use your feedback to improve the documentation.

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CHAPTER 2

OMNIACCESS 780 OVERVIEW

INTRODUCTION

This chapter provides physical and function a l ove rvie w of th e Om n iAcce ss 78 0
(OA-780). It contains functional descriptions of the OA-780 hardware, its major
components, and related features. Descriptions and examples of software
commands are included only when they are necessary for replacing, installing,
configuring, or maintaining the OA-780 hardware.

This chapter contains the following sections:

• OA-780 Overview

• Package Contents

• Hardware Overview

• System Specifications

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OA-780 OVERVIEW

The OA-780 is designed to provide most commonly used network services, such
as routing, switching, wide area network (WAN) connectivity , network se curity with
firewall, and related services.

PACKAGE CONTENTS

1. The OA-780

• 8-slot Chassis that includes

• Services Engine (SE) - 2-port 10/100/1000 Mbps Ether net

• Switch Fabric (built-in)

• Fan Tray (built-in)

• Power Supply (built-in)

2. Optional Modules

• Services Engine (second unit for redundancy)

• Switch Fabric (second unit for redundancy)

• Power Supply Tray (second unit for redundancy or for load sharing)

• 4-port T1E1 Line Card

• 8-port 10/100/1000 Mbps Gigabit Ethernet (GigE) Line Card

• 4-port Serial Line card (V.35/X.21)

3. Miscellaneous

• AC Power Cord

• Console Cable

• Rack Mount Screws

• 19-inch Rack Mount Ears

• 512 MB USB Memory Flash

• Product Documentation CD ROM

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HARDWARE OVERVIEW

The following section provides a detailed overview of the hardware component s of
the OA-780:

THE OA-780

The OA-780 has 8 line card slots, numbered 0 to 7 from left to right, 2 Switch
Fabric slots, a Fan Tray slot in the front, and 2 Power Tray slots in the rear. All
OA-780 cards support Online Insertion and Removal (OIR) feature.

The OA-780 base system has the following components:

• OA-780 Chassis

• Switch Fabric

• SE

• Fan Tray

• Power Tray

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HE OA-780 CHASSIS

T

The OA-780 chassis is a rigid sheet metal structure that houses the other
hardware components. The 3 rack-unit (RU) chassis has a front panel, a rear
panel, and perforated side panels for air flow.

The chassis is of 5.25-inch (13.3 cm) height, 17.5-inch (44.5 cm) width, and 17­inch (43.2 cm) depth. It weighs approximately 50 lbs (22.7 kgs).

Figure 1 shows a OA-780 chassis.

OmniAccess 780

OA7-SF

OA7-T1E1-4

7

1

4

3

1. Switch Fabric

2. Switch Fabric Filler

3. T1E1 Line Card

4. Line Card Filler

5. SE

6. Fan Tray

7. Rack Mount Flange

Figure 1: The OA-780 Chassis

OA7

-SE

4

5

Port 1

t 0

Por

2

6

10

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Hardware Overview

Table 1 summarizes the physical specifications for the OA-780 chassis.

Table 1: OA-780 Chassis Physical Specifications

Parameter Value

Chassis height 5.2-inch (13.3 cm)
Chassis width 17.5-inch (44.5 cm)

19.5-inch (48.3 cm) with rack mount

brackets
Chassis depth 17-inch (43.2 cm)
Chassis weight 50 lbs (22.7 kgs) maximum configuration

Figure 2 shows the air flow pattern through the OA-780 chassis.

OmniAccess 780

OA7-SF

OA7-T1E1-4

OA7-SE

Port 0

Port 1

Figure 2: Air Flow Through the OA-780

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The front panel houses Switch Fabric, SE, line cards, fan tray, status LEDs,
communication ports, and card ejectors. The communication ports on the front
panel provide LAN/W AN and console connecti vity to the system. The LEDs on the
front panel show the status of connectivity and activities of the system
components. All the cards in the front panel dock into the respective slots in the
back plane. The front panel also houses rack-mount flanges that help the system
to be loaded on to a 19-inch rack.

OmniAccess 780

OA7-SF

OA7-T1E1-4

OA7-SE

Figure 3: Front Panel

The rear panel houses the power supply tray and provides the power supply
connectivity to the system. The rear panel accommodates two power trays for
load sharing and power redundancy.

OA7-PS-AC

Figure 4: Rear Panel

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SLOT NUMBERS

The slots in front p anel are numbered 0 thr ough 3, from l eft to right on the top r ow,
4 through 7 from left to right on the bottom row, 24 and 25 for the left and right
Switch Fabric cards. The slots in rear panel are numbered 22 and 23 for each
power tray on the rear panel.

The table below lists the slot number and the component associated with it.

Table 2: Slot Numbers

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Hardware Overview

Slot Number Location Slot Type

0 Front Panel Single Line Card
1 Front Panel Single Line Card
2 Front Panel Dual SE
3 Front Panel Dual SE
4 Front Panel Single Line Card
5 Front Panel Single Line Card
6 Front Panel Dual SE

7 Front Panel Dual SE
22 Rear Panel — Power Supply
23 Rear Panel — Power Supply
24 Front Panel Dual Switch Fabric
25 Front Panel Dual Switch Fabric
26 Front Panel–

Fan Tray

——

Card Associated With the Slot

Number

OmniAccess 780

24

01 2 3

Figure 5: OA-780 (8-Slot Chassis)

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NFORMATION

LED I

The following table shows the state of main LEDs after startup.

Table 3: LED Status Table

LED Status Description

SE LEDs

Active Off Power up status. This is the default display

Switch Fabric LEDs

when the system is first powered on and

before the software is loaded.
Green SE card is active.
Yellow Indicates transient conditions (e.g., booting).

Active Off Power up status. This is the default display

when the system is first powered on and

before the software is loaded.
Green Switch Fabric is active.

Fan Tray Status LED (Tricolor LED)

Off Power up status. This is the default display

when the system is first powered on and

before the software is loaded.
Red Some component of the system is not being

managed by the Chassis Manager, or the

Chassis Manager has exited, or the system

was “reloaded”, or the Chassis Manager has

not yet restarted.
Amber Indicates transient conditions (e.g., booting).
Green Bootup completed, and system is ready to

use.

Fan Tray LEDs (3 Uni-color Port LEDs) representing USB, Console, and Modem
ports

Off System is not working.

14

Console LED Green Console is accessible.

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CABLE CONNECTION TABLE

The following table summarizes the cable connections for the OA-780.

Table 4: Cable Connections Table

Port or Module Port Type Connect To

Power Tray IEC 60320 (320) C-14 Power Inlet Main power supply
Ethernet RJ-45 Ethernet hub or switch
T1E 1 RJ- 4 5 T1E 1 net w ork
Console RJ-45 PC or VT100
Modem RJ-11 Telephone Line
Serial 68 pin VHDCI Connector V.35/X.21 modem

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USER MODULES

This section provides description about the modules/components that can be
installed.

S

WITCH FABRIC

The Switch Fabric provides the default management control for all the line cards.
The Switch Fabric also performs management functions like chassis
management, fan speed control, temperature and voltage monitoring, and
maintaining general health of the system.

The Switch Fabric can be accessed through the RS232 console interface on the
fan tray front panel. The front panel LEDs on Switch Fabric indicates Active and
Fault condition. The default slot for the Switch Fabric is slot 24 on the top row. A
secondary Switch Fabric can be installed in slot 25 on the top row.

OA7-SF

1 Ejector Lock
2 Switch Fabric LEDs

Figure 6: Switch Fabric

Switch Fabric LEDs

The Switch Fabric has two LEDs that show the status of the Switch Fabric.

Table 5: Switch Fabric LEDs

LED Status Description

Active Green Switch Fabric is active.
Fault Red Reload in progress.

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LINE CARDS

All the line cards can be mounted on a single slot except SE that require two slots.
Next generation SE line cards may occupy a single slot only. An overview of the
line cards is given below.

SE (S

ERVICES ENGINE)

The SE card is the main data processing center in the chassis. The SE card has
two external auto-negotiable copper GigE ports. The GigE interfaces can auto­negotiate, transmit, and receive data packets at rates of 10/100/1000 Mbps.

The LEDs on the SE card indicate Active or Fault conditions. The LEDs on the
Gigabit Ethernet ports of the SE card indicate Link Status and Activity. The SE
card is a dual slot line card, and can be installed in slots 2, 3 or slot 6, 7.

Note: By default, the SE card is installed in slots 6, 7.

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Hardware Overview

OA7-SE

1. SE LEDs

2. GigE Ports

3. Thumb Screw

4. Left LED on the Ethernet Port

5. Right LED on the Ethernet Port

Figure 7: Services Engine

5

4

1

2

3

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SE Card LEDs

SE card has status LEDs for the card and for each of its Ethernet ports.

Table 6: SE Card LEDs

LED Status Description

Active G reen SE card is active
Fault Red Reload in progress

Table 7: LEDs for Ethernet Port on SE Card

LED Status Description

Left LED Green Link Spe ed is 1000/10 Mbps

Yellow Link Speed is 100 Mbps
Off Link is not active

Right LED Amber Traffic is active

Off Traff ic is not active

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Hardware Overview

4-PORT T1E1 LINE CARD

The 4-port T1E1 line card supports America n an d Europ ean (Interna tio nal) digi tal
transmission standards. The line card can be installed in any of the line card slot s
of the chassis. (i.e., 0, 1, 2, 3, 4, or 5). The 4-port T1E1 line card has 4 RJ-45
interfaces. Each interface can support data rates of 1.544 or 2 Mbps depending
on the type of connectivity.

Figure 9 shows the 4-port T1E1 line card as an example.

OA7-T1E1-4

1

1. T1E1 Card LEDs

2. T1E1 Mode LEDs

3. T1E1 Port LEDs

4. RJ-45 Interfaces

5. Thumb Screw

Figure 8: 4-port T1E1 Line Card

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4-port T1E1 Line Card LEDs

The LEDs on the 4-port T1E1 line card indicate Active or Fault condition, T1
mode, E1 Balanced (E1B) mode, and E1 Unbalanced (E1U) mode . The 4x4 LEDs
on the front of the card indicate Local Alarm, Remote Alarm, Carrier Detect, and
Loop Back for the four ports.

The following tables describe the status of LEDs on the T1/ E1 card.

Table 8: T1/ E1 Card LEDs

LED Status Description

Active Green T1/ E1 card is active.

Yellow Indicates transient conditions (e.g.,

booting).

Fault Red Reload in progress.

Table 9: T1/ E1 Port LEDs

LED Status Description

Local Alarm (LA) On Indicates either Red or Yellow alarm

present or Transmitting Blue/AIS alarm

Off Indicates neither Red nor Yellow alarm

is present and transmitter also not
transmitting AIS/Blue Alarm.

Remote Alarm (RA) On Remote System is transmitting Blue/

AIS alarm.

Off Remote system is not transmitting any

alarm.

Carrier Detect (CD) On Carrier detected (cable plugged in)

Off Carrier not detected (cable plugged

out)

Loopback (LB) On Indicates port is in any of the local or

network Loopback mode.

Off Port is not in Loopback mode.

Note: You will see LED activity only when the port is administratively up.

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Table 10: T1E1 Mode LEDs

T1 E1B E1U Description

On Off Off Line card configured in T1 mode.
Off On Off Line Card Configured in E1 balance mode.
Off Off On Line Card Configured in E1 unbalance mode.
Off Off Off No mode configured on line card.

PORT GIGABIT ETHERNET LINE CARD

L2 8-

The 8-port GigE line card provides Layer-2 switching functions. The line card can
be installed in any of the line card slots of the chassis. (i.e., 0, 1 , 2, 3, 4, or 5). T he
GigE card has 8 RJ-45 interfaces. These interfaces can auto-negotiate, transmit,
and receive data packets at rates of 10/100/1000 Mbps.

GigE Port LED 0

OA7-GE-8

1. GigE Card LEDs

2. RJ-45 Interfaces

3. Thumb Screw

LED2

LED1

1

LED4LED3 LED5 LED6

2

LED7

3

Figure 9: GigE Line Card

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GigE Line Card LEDs

The LEDs on the GigE line card indicate Active or Fault conditions. The LEDs on
each of the card’s ports indicate Link Status and Activity.

The following tables describe the status of LEDs on the GigE card.

Table 11: GigE Card LEDs

LED Status Description

Active G reen GigE card is active.

Fault Red Reload in progress.

Yellow Indicates transient conditions (e.g.,

booting).

Table 12: LEDs for each Port on GigE Card

LED Status Description

LED 0 Off Port 0 link is not active.

Solid Green Port 0 link is active.
Blinking Green Port 0 link and traffic is active.

LED 1 Off Port 1 link is not active.

Solid Green Port 1 link is active.
Blinking Green Port 1 link and traffic is active.

LED 2 Off Port 2 link is not active.

Solid Green Port 2 link is active.
Blinking Green Port 2 link and traffic is active.

LED 3 Off Port 3 link is not active.

Solid Green Port 3 link is active.
Blinking Green Port 3 link and traffic is active.

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LED 4 Off Port 4 link is not active.

Solid Green Port 4 link is active.
Blinking Green Port 4 link and traffic is active.

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LED Status Description

LED 5 Off Port 5 link is not active.

Solid Green Port 5 link is active.
Blinking Green Port 5 link and traffic is active.

LED 6 Off Port 6 link is not active.

Solid Green Port 6 link is active.
Blinking Green Port 6 link and traffic is active.

LED 7 Off Port 7 link is not active.

Solid Green Port 7 link is active.
Blinking Green Port 7 link and traffic is active.

Hardware Overview

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OmniAccess 780 Overview

ERIAL LINE CARD (V.35/X.21)

S

Serial Card (V.35/X.21) provides WAN termination for four ports over serial sync
interfaces. The line card can be installed in any of the line card slots of the
chassis. (i.e., 0, 1, 2, 3, 4 or 5). The card allows full duplex operation on a single
copper pair and operates in either DTE of DCE mode depending on the cable
attached.

V.35 and X.21 are well known communication protocols over synchronous serial
lines.

V.35 Interface

The V.35 interface was originally specified by CCITT as an interface for 48kbps
line transmissions. It has been adopted for all line speeds above 20kbps.

V.35 is a mixture of balanced and common earth signal interfaces. The control
lines including DTR, DSR. DCD, RTS, and CTS are single wire common earth
interfaces. The data and clock signals are balanced signals.

X.21 Interface

The physical interface between the DTE and the DCE is defined in ITU-T
recommendation as X.21. The DCE provides a full-duplex, bit-serial, synchronous
transmission path between the DTE and the local PSE. It can operate at data
rates from 600bps.

OA7-USP-2

4

1. V.35/X.21 Card LEDs

2. V.35/X.21 Port LEDs

3. 68 pin VHDCI Connector

4. Thumb Screw

Figure 10: Serial Line Card (V.35/X.21)

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