Paradyne 8747 User Manual

Testing

8700-A2-GB20-00

April 2000

Network Line Loopback (LLB) loops the received signal on the network interface
back to the network without change. Also, for DSX-1 models:

H

If the DSL port is in a DS0 cross-connection, corresponding DSX-1 time slots
are sent all ones.

H

If the DSL port is in Bypass mode or a DS1 cross-connection, an AIS is sent
to the corresponding DSX-1 port.

CAP

DSL
Port

DSX-1
or G.703
Port

CAP

T1/E1

LIU

Framer

Framer

Transceiver

AIS

99-16612

"

To run a Line Loopback:

1. Position the cursor at the Start command next to Network Line Loopback on

the Network & DSX-1 or Network & G.703 Tests screen.

2. Press Enter.

The Start command is changed to Stop.

3. To manually stop the test, verify that the cursor is positioned at the Stop

command.

4. Press Enter.

Network Line Loopback cannot be started when another loopback or pattern test
is in progress.