Data Channel Loopbacks On A Frame Relay Link - Paradyne FrameSaver FLEX 9123 User Manual

Data Channel Loopbacks on a Frame Relay Link

A network-initiated Data Channel Loopback (DCLB) that loops data over the frame
relay link (DS0s) received on the network interface through the FrameSaver unit's
framing circuitry and back to the same interface.
A DCLB can be controlled over the frame relay link using one of the following
in-band methods:
T
T
The frame relay service provider can use DCLB to verify the integrity of the frame
relay circuit.
9123-A2-GB20-20
V.54 Loopback.
ANSI T1.403 Annex B Fractional T1 (FT1) Channel Loopback.
Other
T1 All
1s
Interface
CAUTION:
V.54 and FT1 Loopbacks may affect the operation of the frame relay
PVCs assigned to the selected port. While in loopback, the frame relay
link will be down so any IP data being sent while this test is active will be
disrupted.
August 2001
Framer
The T1
DCLB
Interface
98-16223
6. Troubleshooting
6-25