Paradyne 8779, U8777 manual Network Line Loopback

8. Testing

Network Line Loopback

A Network Line Loopback (LLB) loops the received signal on the network interface back to the network without change.

For DSX-1 models:

If the DSL port is in a DS0 cross-connection, corresponding DSX-1 time slots

Tare sent all ones.

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

CAP CAP

DSL

Port

Transceiver Framer

T1/E1

Framer

LIU

AIS DSX-1 or G.703

Port

02-16612-01

Procedure

To run a Network 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. Status is changed to Active.

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

4.Press Enter.

Status is changed to Inactive.

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

8-4 May 2002 8700-A2-GB20-40