Testing
150-359-100-01,
Revision
01
46
October 27, 2000
HXU-359 List 1
L
OOPBACKS
Loopbacks can be used to verify that signals are being properly transmitted
and received by sending a SONET or DS1 signal back to its origin. Refer to
for a description of system
loopbacks. The choices for loopback configurations are:
•
NONE - no loopback
•
TERM - Terminal loopback
•
FCLT - Facility loopback
DS1 Loopbacks
To set a loopback for a DS1 interface:
1
Choose Config, then Services. Press
.
2
Use the arrow keys to select the DS1 service and press
.
3
Using the spacebar, set the port to OOS-M.
4
Press the
key to select the Lpbk field in the configuration bar at the
bottom of the screen.
5
Press
to view the loopback options (NONE, TERM or FCLT,
then press
to activate a loopback.
To deactivate the TERM or FCLT loopback for the DS1 service port:
6
Reselect the DS1 service port (steps 1 and 2 above).
7
Press
to place it in service (IS).
8
Press the
key to select the Lpbk field and set the loopback option to
NONE. Press
.
Do not configure a service or transport as OOS-M or OOS-A
when it is selected as a clock synchronization source.
ENTER
ENTER
TAB
SPACEBAR
ENTER
SPACEBAR
TAB
ENTER
