Paradyne U8777 - Manual (Page 84)

8. Testing
8-6 May 2002 8700-A2-GB20-40
DTE Loopback
DTE Loopback loops the DSX-1 or G.703 signal back to itself, retaining (bipolar
violation) BPV transparency. Also:
T If the DSX-1 or G.703 port is in a DS0 cross-connection, the time slots
cross-connected to the DSX-1 or G.703 port are sent all ones.
T If the DSX-1 or G.703 port is in Bypass mode or a DS1 cross-connection, all
ones are sent to the corresponding port and data received on the connected
ports will be ignored.
Procedure
To run a DTE Loopback:
1. Position the cursor at the Start command next to DTE 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 DTE Loopback cannot be started when any other loopback test is in progress.
CAP
DSL
Port
DSX-1
or G.703
Port
CAP T1/E1
LIU
Framer Framer Transceiver
02-16614-01
All Ones