User manual

Diagnostics & Troubleshooting
Testing Low-Speed Interface Operation
7-26 July 2004 Wide Bank 28 DS3 - Release 2.4
DS1 Send NIU Loopup Code Toward Network
1. Send NIU loopup toward the test set connected to the DS3 interface.
(A:Active)> ds1 1 send niu loopup network
2. Verify that test set responds to loopup code.
3. Send loopdown toward the test set connected to the DS3 interface.
(A:Active)> ds1 1 send niu loopdown network
4. Verify that test set responds to the loopdown code.
Figure 7-16 Send Low-Speed NIU Loopup Code Toward Network
Trans-
ceiver
Selector
M13
Framer
Trans-
ceiver
Relays
LS Card HS Card
DS3
Send NIU Loopup
Toward DS3
Relays
DS1/E1