Avaya S8700 Maintenance Manual page 2244

For multi-connect configurations

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Table of Contents

Maintenance-Object Repair Procedures

Facility Fault Sectionalization

DS1 facility fault sectionalization involves looping around the DS1 signal at on-site

access points to localize the source of the problem to equipment and wiring on

either the near side or far side of the loop-around point.

The facility fault sectionalization technique disrupts service. When you

perform the loop around on a facility, make sure it is not the on-line

synchronization reference or a system outage will occur.

When you use this technique to investigate problems on facilities with multiplex or

DACS equipment, the technique becomes cumbersome because every 64-kbps

(B channel) or subrate channel corresponding to the DS1 facility needs to be

looped around.

on-site equipment. A typical example is the case where the only on-site

equipment is channel-terminating equipment designated Unit #1. A more

complex, less typical example might have a DACS as Unit #1, a protection switch

as Unit #2, and a DS1-level microwave radio system as Unit #3.

The flowchart in

sectionalization technique. It is important that you know the configuration and

wiring of the equipment for the problem facility in order to support this technique.

DS1 interface

Figure 8-93. Manual Loop-Around for Facility Fault Sectionalization

Since the technique is time consuming, fix any DS1-BD, UDS1-BD, STRAT-3, or

SYNC errors first that are not slip errors.

Issue 1 May 2002

shows a sequence of units (1 though n) that may be connected as the

Figure 8-94 on page 8-1523

at next unit

gives an overview of the facility fault

sync4 LJK 072501

Troubleshooting