Remote Loopback; Remote Loopback; Ds3 Test Configuration; Ds3 Test Configuration - ADTRAN Total Access 5000 Deployment Manual

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.

DS3 Test Configuration

This section details the following information:
• Remote loopback configuration
• Test administrative functions
• Local line loopback configuration
• BERT test configuration
65K510DEP08-1A
DS-3 Facility

Figure G-2. Payload Loopback Diagram

NetVanta 873
DS-3 Facility
Framer

Figure G-3. Remote Loopback Diagram

Appendix G, BSM DS3/DS1 Layer 1 Tests - Remote Loopback
Payload Loopback
DS3 Interface
Framer
Remote Loopback
Total Access 5000
Framer
DS-3 Facility
G-3