Zhone IMACS-200 ユーザーズマニュアル

14-2 

Model No.

Running Head

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.

T1 Line loopback Toward Network

Yes

T1 Local loopback Toward User

Yes

DS0 Channel loopback Toward Network

No

DS0 Channel loopback Toward User

Yes

Industry-Standard T1 Loop-Up Code

N/A

Industry-Standard T1 Loop-Down Code

N/A

Industry-Standard T1 Loop-Up Code

N/A

Industry-Standard T1 Loop-Down Code

N/A

All 1s

Yes

All 0s

Yes

1:1

Yes

1:7

Yes

511

No

2047

No

3:24

Yes

QRSS

Yes

Toward User

No

Toward Network

Yes

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