Server Alarms - Avaya Support

Communication Manager Maintenance Object Repair Procedures
Expansion Interface Lightwave Transceiver
Looparound Test (#242)
This test is destructive.
This test requires that the EI circuit pack first be busied out. If the system has a duplicated Port
Network Connectivity, this test cannot be run on an EI circuit pack that resides on the current
active PNC due to restrictions that prohibit the busying-out of certain components that are part
of the active PNC. If this test is run on an EI circuit pack that is part of the standby PNC, this test
is not destructive and no service outages will take place.
In a system without duplicated Port Network Connectivity, where this EI circuit supports an IPSI
to PN link, this test will disrupt service to one or more PN’s. If the EI circuit pack is part of a
PN-to-PN link in a Direct Connect system, service between the two PNs will be disrupted.
This is a 2-part connectivity test. In the first part of the test, a digital count is transmitted from the
cabinet of the EI circuit pack under test, through the EI circuit pack under test, out to its
lightwave transceiver. The connection then loops back into the lightwave transceiver, through
the same EI circuit pack again, and into the originating cabinet. If the test tone is detected by a
tone detector, the first part of the test passes. The path used for this part of the test is
represented in Figure 134: TDM BUS Lightwave Transceiver Looparound.
In the second part of the test, a data packet is sent from the TN1655 Packet Interface circuit
pack to the EI circuit pack under test, the packet is looped back through the lightwave
transceiver and is sent back to the Packet Interface circuit pack. If the Packet Interface circuit
pack receives the same packet it transmitted, the second part of the test passes. If the entire
test has passed, the EI circuit pack, its backplane wiring, and the electrical portion of the
lightwave transceiver are healthy. The path used for this test is represented in
Figure 135: Packet Bus Lightwave Transceiver Looparound—PN only. The path used for this
test if the EI resides in a PN is represented in Figure 136: Packet Bus Lightwave Transceiver
Looparound—CSS and PN.
When the EI circuit pack under test is in a PN, the data packet must also pass through the active
EI circuit packs and the active DS1 converter circuit packs (and the active SNI circuit pack(s) in
a Center Stage Switch system) of the active PNC link connecting the PN.
This test requires the EI circuit pack to ignore incoming data from its neighbor EI circuit pack or
SNI circuit pack. Thus this test will:
● Disturb any inter-PN connections that currently exist over the link provided by the EI under
test and its neighbor
● Disrupt signaling between the two circuit packs
1676 Maintenance Alarms for Avaya Communication Manager, Media Gateways and Servers