Avaya DEFINITY SERIES - Page 85

DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
SREPN Maintenance
2-31Fault isolation procedures
2
Fiber direct-connect system
Figure 2-17 shows the loopbacks performed on the SNI and EI circuit packs.
Figure 2-17. Fiber fault isolation tests for SNI and EI circuit packs
Figure 2-17 shows that:
■ 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
.
cydf058 RPY 022499
TN753
switch
node
interface
TN570C
expansion
interface
Test #
757
Test #
756
Test #
242
Tone
clock
Tone
detector
DEFINITY
ECS
SREPN
TDM
BUS
Fiber optic
cable
Back of
cabinet
Back of
cabinet
Lightwave
transceivers
Test #989
(framing)
Test #989
(framing)