Product specifications

Chapter 5 Operation

5.15.1 Loopback Testing

Introduction

There are four types of loopback functions for the E1/T1 Module :

Tributary Local Loopback (for each E1 signal)

Aggregate Local Loopback (for all multiplexed E1 signals)

Aggregate Remote Loopback (for all multiplexed E1 signals)

Tributary Remote Loopback. (for each E1 signal)

Users can select whether to diagnose a specific channel or all channels under the loopback / V.54 Testing.

a. Tributary Local Loopback : In the Loopback / V.54 Testing screen, select the slot ID which is on the

tributary card in the local site, then choose "LoLbk / ANA" item.

b. Aggregate Local Loopback : In the Loopback / V.54 Testing screen, select the aggregate item

("Aggr/Lo") in the local site then choose "LoLbk / ANA" item.

c. Aggregate Remote Loopback : In the Loopback / V.54 Testing screen, select the aggregate item

("Aggr/Re") in the remote site then choose "ReLbk / DIG" item.

d. Tributary Remote Loopback : In the Loopback / V.54 Testing screen, select the slot ID which is on the

tributary card in the remote site then choose "ReLbk / DIG" item.

Info : In the E1/T1 module, the "REM" loopback is not available. It is only for the V.35 module.

Local site Remote site