Lucent Technologies DDM-2000 OC-3, Руководство по установке

Страница: 375 / 492

363-206-204
Release 13 (TARP) Installation Tests
Issue 9 October 1998 9-9
NOTE
:
If the shelf is not fully equipped, move circuit packs around and repeat the
test. Test all circuit pack positions which have DSX cabling.
NOTE
:
After completing this test, isolate and correct any incorrect wiring or isolate
and replace any failed units. If any cabling is corrected or units replaced,
repeat the Local Equipment and cross-connect tests until the units pass
without failures.
NOTE
:
Refer to 363-206-285, DDM-2000 OC-3 Multiplexer User/Service Manual ,
(latest issue) for complete command descriptions.
NOTE
:
Unterminated optical connectors may emit laser radiation. Do not view
beam with optical instruments.
Preparation Procedure
1. The ’Free Running’ timing configuration is required for the DSX-1 test. The
timing parameters are set on the TGS pack. Refer to Section 4 of this man-
ual for option switch settings. Set timing to ‘Free Running’.
2. Fully insert the OLIUs into the shelf.
3. Connect the OLIU OUT to the OLIU IN of each OLIU, using optical fiber
jumper cables. Refer to Figure 9-1.
NOTE
:
The optical fiber cables required are listed under "Tools, Test Sets, and
Accessories".
NOTE
:
When looping a 22G-U (or 24G-U) OLIU back on itself a 10 dB LBO is
required. When looping a 27G-U OLIU back on itself two 15 dB LBOs are
required.
NOTE
:
If any of the OLIUs are of the universal type (ex: 22G-U) and other than
ST
®
type connectors are being used, see Table 9-3 for the universal LBOs
needed and Table 9-4 for the lightguide jumpers.
4. During the loopback test the far-end communications must be disabled.
Issue the command
set-fecom