User manual

Diagnostics & Troubleshooting
Testing Low-Speed Interface Operation
7-24 July 2004 Wide Bank 28 DS3 - Release 2.4
DS1 Send CSU Loopback Toward Drop
1. Send CSU loopup toward the test set connected to the low-speed interface.
(A:Active)> ds1 1 send csu loopup drop
2. Verify that test set responds to loopup code.
3. Send loopdown toward the test set connected to the low-speed interface.
(A:Active)> ds1 1 send csu loopdown drop
4. Verify that test set responds to the loopdown code.
Figure 7-14 Send Low-Speed CSU Loopup Code Toward Drop
5. Repeat tests for interface configured with a line code of AMI.
(A:Active)> ds1 1 linecode ami
NOTE: The linecode parameter is used only with DS1s. The E1s are always configured
for HDB3.
Trans-
ceiver
Selector
M13
Framer
Trans-
ceiver
Relays
LS Card HS Card
DS3
Relays
DS1/E1
Send CSU Loopup
Toward DS1/E1