User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 7-25
Diagnostics & Troubleshooting
Testing Low-Speed Interface Operation
DS1 Send NIU Loopup Code Toward Drop
1. Send NIU loopup toward the test set connected to the low-speed interface.
(A:Active)> ds1 1 send niu 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 niu loopdown drop
4. Verify that test set responds to the loopdown code.
Figure 7-15 Send Low-Speed NIU Loopup Code Toward Drop
Trans-
ceiver
Selector
M13
Framer
Trans-
ceiver
Relays
LS Card HS Card
DS3
Relays
DS1/E1
Send NIU Loopup
Toward DS1/E1