Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 2331 / 2536

DLP-544
: Detailed Level Procedure 363-206-285
Page 1 of 4 Issue 2, February 2000
DDM-2000 OC-3 M
ULTIPLEXER
Perform OC-3c (STS-3c) Transmission Test
1. NOTE:
Ensure that the OC-3c feature has been enabled.
NOTE:
This procedure may be used to perform OC-3c transmission tests in the
mux (toward the fiber) direction. When this procedure is being used to
perform end-to-end OC-3c tests, it is assumed that the complete
end-to-end system has already been tested and that only the OC-3c
signal is being tested at this time. Transmission tests in the
mux direction
may be local or end-to-end tests (see Figure 1).
NOTE:
This test is performed with a SONET test set.
NOTE:
When this procedure is used to do end-to-end tests, one DDM-2000
OC-3 Multiplexer will be referred to as the near end and the other
assembly as the far end. These designations are arbitrary; either
assembly can be the near-end or the far-end assembly.
2. See Figure 1. If local tests are being performed, the fiber loopback at the
near-end 22D-U/22G-U/22G2-U/22G3-U/22G4-U OLIU must be in place. If
end-to-end tests are being performed, at the far-end LGX cross-connection
associated with the DDM-2000 OC-3 Multiplexer being tested, connect a
patch cord from the OUT jack to the IN jack for the OC-3c signal to be tested.
3. At the cross-connection associated with the near-end DDM-2000 OC-12
Multiplexer, connect the SONET test set to the IN and OUT jacks associated
with the circuit under test.
Figure 1 – Transmission Test of OC-3c Signal in MUX Direction