Zhone Technologies IMACS-200 manual User port Diagnostics, WAN Diagnostics

User port Diagnostics System Testing and Diagnostics

14.3 User port Diagnostics

14.3.1 WAN Diagnostics

Software-initiated diagnostics on T1 WAN aggregates involve looping the WAN signal toward the network (line loopback) or the system (local loopback) and placing any one of the DS0 channels that make up the WAN signal in local loopback. The table below list detailed information on the diagnostic capabilities of the WAN ports.

Loopbacks

On-port loopbacks

T1 Line loopback Toward Network	Yes
T1 Local loopback Toward User	Yes
DS0 Channel loopback Toward Network	No
DS0 Channel loopback Toward User	Yes
In-Band loopback Code Generation
Industry-Standard T1 Loop-Up Code	N/A
Industry-Standard T1 Loop-Down Code	N/A
In-Band loopback Code Detection
Industry-Standard T1 Loop-Up Code	N/A
Industry-Standard T1 Loop-Down Code	N/A
Bit Error Rate Tester (BERT)
Patterns Supported
All 1s	Yes
All 0s	Yes
1:1	Yes
1:7	Yes
511	No
2047	No
3:24	Yes
QRSS	Yes
BERT Direction
Toward User	No
Toward Network	Yes
Statistics Gathered by BERT
Bit Errors (BE)	Yes
Errored Seconds (ES)	Yes
Severely Errored Seconds (SES)	Yes
Consecutive Severely Errored Seconds	Yes
Out of Synchronization Seconds (OOS)	Yes
Bit Error Rate (BER)	Yes
Elapsed Seconds (ELAP)	Yes

14-2 Diagnostics