Network line loopback – Paradyne U8777 User Manual
Page 82
8. Testing
8-4
May 2002
8700-A2-GB20-40
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:
T
If the DSL port is in a DS0 cross-connection, corresponding DSX-1 time slots
are sent all ones.
T
If the DSL port is in Bypass mode or a DS1 cross-connection, an AIS is sent to
the corresponding DSX-1 port.
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.
CAP
DSL
Port
DSX-1
or G.703
Port
CAP
T1/E1
LIU
Framer
Framer
Transceiver
AIS
02-16612-01