ADTRAN Total Access 5000 - Remote Loopback; DS3 Test Configuration; Figure G-2. Payload Loopback Diagram; Figure G-3. Remote Loopback Diagram

Appendix G, BSM DS3/DS1 Layer 1 Tests - Remote Loopback
65K510DEP08-1A G-3
Figure G-2. Payload Loopback Diagram
Remote Loopback
Aremoteloopback (seeFigureG‐3)transmitsaFarEndLoop‐upcodeviatheFEACchannelin
theDS3moduletothecustomerequipment,whichrespondsbysetting‐upalineloopback
towardstheDS3cardintheTotalAccess5000.AfterthecustomerequipmentDS3portis
looped‐
up,BERTpatternscanbesentfromtheDS3cardtotesttheintegrityoftheDS3circuit.
NOTE
DS3BERTpatternscanbesentfromexternaltestequipment.Forexample,
theintegratedBERTintheDS3EFMmodule.
TheRemoteLoopbackrequestonlyworksintheC‐Bitframingmode.
Figure G-3. Remote Loopback Diagram
DS3 Test Configuration
Thissectiondetailsthefollowinginformation:
•Remoteloopbackconfiguration
•Testadministrativefunctions
•Locallineloopbackconfiguration
•BERTtestconfiguration
DS-3 Facility
DS3 Interface
Framer
Payload Loopback
Remote Loopback
DS-3 Facility
NetVanta 873
Framer
DS-3 Facility
Total Access 5000
Framer