User manual

Diagnostics & Troubleshooting
Testing DS3 Interfaces
7-36 July 2004 Wide Bank 28 DS3 - Release 2.4
DS3 Line Loopback with C-bit Framing
1. Repeat test using C-bit Parity framing.
(A:Active)> ds3 framing cbit
(A:Active)> ds3 line on
2. When complete, disable line loopback.
(A:Active)> ds3 line off
DS3 Payload Loopback with M23 Framing
1. With a test set on the DS3, configure for M23 framing and apply a payload loopback.
(A:Active)> ds3 framing M23
(A:Active)> ds3 payload on
2. At the test set apply a PRBS pattern to a low-speed line, and verify that the test set synchronizes
on the pattern without errors.
3. When complete, disable payload loopback.
(A:Active)> ds3 payload off
DS3 Payload Loopback with C-bit Framing
1. Repeat test using C-bit Parity framing.
(A:Active)> ds3 framing cbit
(A:Active)> ds3 payload on
2. When complete, disable payload loopback and set clock to internal.
(A:Active)> ds3 payload off
ds3 payload off
(A:Active)> ds3 clock int
ds3 clock int