5-12
Issue 9 October 1998
363-206-204
Release 6 Installation Tests
4. The optical fiber loopbacks should still be in place. Refer to Figure 5-1,
DSX cabling test.
Procedure
1. Issue the command
test-auto:md=dsx
(TEST-AUTO TURNUP).
The CR, MJ, and MN LEDs on the user panel will light. This indicates the
start of the DSX test. Any DSX cabling 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.
2. Remove all the DSX cross-connect, BNC connector or Internal loopbacks
for DS1 and DS3 service. The loopbacks for EC-1 interfaces should
remain, as the BBG6 transmits an internal signal at all times and an ‘INC.
EC1 LOS’ alarm will result if loopbacks are removed.When EC-1 loopbacks
are present, ‘INC. STS AIS’ alarms may exist at the far-end for low speed
applications utilizing VT cross-connects.
3. If DS1 circuit packs without loopbacks at the DSX-1 were removed to
speed up testing, reinstall them.
4. Press the UPD/INIT pushbutton on the SYSCTL.
End-To-End System Test
Description
This test verifies proper fiber optic cabling and OLIU circuit packs.
On initial installation/turn-up of a Release 6 System default cross-connects exist.
For applications as in Figure 5-3 or 5-4 the default cross-connects may have to be
deleted and reentered to fit the individual application.
An EC-1 interface composed of DS1 services should be cross-connected at the
VT level as opposed to the STS-1 level. Thus in the event of one VT (or more)
failure the channel protection switch would occur. An EC-1 interface composed of
DS3 services should be cross-connected at the STS-1 level.
Preparation
1. Verify that each shelf in the system is set for the correct timing option. Typi-
cally, a CO is set for either external or free running and the other sites are
set for
2. loop timed.
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