7-14 Issue 9 October 1998
363-206-204
Release 8 Installation Tests
The optical span test checks the transmission across the optical interfaces.
Signals are monitored at both ends of the span. Results from the far-end are sent
back to the near end for reporting. No manual loopbacks are required for this test.
1. Issue the command
test-auto:md=optics
(TEST-AUTO TURNUP).
The CR, MJ, MN and PMN LEDs on the user panel will light. This indicates
the start of the optics test. Any pack failures will be indicated by a flashing
FAULT LED on the corresponding circuit pack during the test. When the
test has successfully completed, all LEDs will go out.
The results will be displayed on the CIT, with a
g
indicating good, an
F
indicating failure, and
a
- indicating unequipped under each cross-connect
designation.
DS1/DS3 Verification Tests (Optional)
The following test verifies proper operation of the DS1 or DS3 transmission paths
between sites. Typically, the entire DDM-2000 OC-3 shelf will pass or fail this test,
indicating that the transmission path is good or bad.
The STS-1E circuit packs can not be tested with the test transmission commands
directly, thus the BBG6 (STS-1E) circuit pack must be tested with a MXRVO or
DS3 circuit pack. The BBG6 must be located at the far-end where the loopback
connections are made.
1. If a problem is isolated to the path, determine and correct the path problem
and repeat the system test.
2. If the path is trouble-free but a problem still exists, isolate and correct the
circuit pack, shelf, or/and cable problem(s). Repeat any of the installation
tests as necessary.
NOTE
:
If a valid DS1, DS3, EC-1 signal is applied to the DDM-2000 OC-3 and
then removed, the FAULT LED on the DS1, DS3 or EC-1 circuit pack will
flash. Press the UPD pushbutton on the SYSCTL to stop any flashing
LEDs.
3. Determine the transmission paths for each equipped function group. Figure
7-3 shows typical transmission configurations for an add/drop system
arrangement. Figure 7-4 shows typical configurations for a hubbing
arrangement. The actual add/drop and hub connections should be similar
to those shown.
4. DDM-2000 OC-3 Release 8 permits the shelf to be placed into default or
manual cross-connect mode, using the
set-ne
command. See the
ent-
crs
or
dlt-crs
commands in the 363-206-280,
DDM-2000 OC-3 Multi-
plexer User/Service Manual
to enter the proper cross-connects for individ-
ual applications. Make any necessary cross-connect changes at the CO
shelf.
Summary of Contents for DDM-2000 OC-3
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