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DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN 555-233-121
2
SREPN Maintenance
Fault isolation procedures
Fiber direct-connect system
Figure 2-17
DEFINITY
ECS
TN753
switch
node
interface
Figure 2-17. Fiber fault isolation tests for SNI and EI circuit packs
Figure 2-17
Test #756 reports the result of the off-board loopback
Test #757 reports the result of the on-board loopback
Test #756 and Test #757 can run individually or as part of the test board
UUCSS long command for an SNI circuit pack.
Test #242 can be run as part of the test board UUCSS long command for
an Expansion Interface circuit pack. In addition to testing on-board
components, this test is helpful for isolating problems between a circuit
pack and the lightwave transceiver .
The loopback shown in this diagram shows only part what Test #242 does.
If no lightwave transceiver is connected to the Expansion Interface circuit
pack, an on-board loopback is performed on the Expansion Interface circuit
pack. For more information about Test #242, see the EXP-INTF
Maintenance Object in Chapter 9 of DEFINITY ECS Release 9
Maintenance for R9r .
shows the loopbacks performed on the SNI and EI circuit packs.
Back of
cabinet
Test #
Test #
757
756
Test #989
(framing)
shows that:
Back of
cabinet
Fiber optic
cable
Test #
242
Lightwave
Test #989
transceivers
(framing)
Issue 2
November 2000
TDM
BUS
SREPN
Tone
clock
TN570C
expansion
interface
Tone
detector
cydf058 RPY 022499
2-31
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