Network Device Installation and User's Guide

Illustrations of Loops and Self-Tests
9/24/01 12-7
12.9.2 Equipment Loopback
Figure 12-3: Equipment Loopback
12.9.3 Equipment Loopback - Payload
Figure 12-4: Equipment Loopback - Payload
Voice
Channels
V.35
Data
DS1 Equipment Loopback
Loop occurrs at DS1 (at framer), Check for
framing & errors. It metallically loops Tx to
Rx.
Commands:
loop d1 equipment line
statistics ds1 1 current
loop none
DS-1 Network
Voice
Channels
V.35
Data
DS1 Equipment Loopback Payload Only
(Reframes T1)
Loop occurs at DS1 (location), only loops 192
bits & reframes the T1. Check for framing &
errors
Commands:
loop v1 equipment line
statistics ds1 1 current
loop none
DS-1 Network