Avaya 03-300430 User Manual

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 

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 

on page 1212. The path 

used for this test if the EI resides in a PN is represented in 

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

lightwave

To CSS or

Neighbor EI

TDMBUS (PN X)

Tone

Tone

Clock

Detector

EXP

_INTF

transceiver