User manual

Diagnostics & Troubleshooting
Testing DS3 Redundancy
7-42 July 2004 Wide Bank 28 DS3 - Release 2.4
Testing Electronics and Network Protection
 DS3 Test Setup ... 7-42
 DS3 Network Protection Test ... 7-42
 DS3 Electronics Protection Test ... 7-43
DS3 Test Setup
The following steps will configures the DS1s for B8ZS line coding (E1 circuits must be
configured for HDB3), DS3s for M23 formatting, and DS3 electronic and Network redundancy.
1. Configure all DS1s for B8ZS line coding (DS1 circuits only; E1 is always HDB3):
(A:Active)> ds1 all linecode B8ZS
2. Configure both DS3s for M23 framing.
(A:Active)> ds3 framing m23
3. Configure for DS3 electronic redundancy and network redundancy.
(A:Active)> ds3 protect on
ds3 protect on
(A:Active)> arm on
arm on
4. Ensure that revertive switching is off.
(A:Active)> revertive off
revertive off
DS3 Network Protection Test
1. Using 75-ohm BNC coaxial cable, loop Primary DS3 receive and transmit signals together, and
loop Secondary DS3 receive and transmit signals together.
2. Send PRBS pattern across the low-speed circuit using the test set.
3. Verify that a manual switch-over to the secondary Controller can be achieved.
(A:Active)> switch
Switching control to Standby DS3 Controller
(B:Active)>