Avaya S8700 - Page 182

Maintenance Object Repair Procedure
555-233-142
8-878 Issue 1 May 2002
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below when inspecting
errors in the system. For example, by clearing error codes associated with the
PDATA Port Local Loop-Around test (#602), you may also clear errors generated
from other tests in the testing sequence.
LAP-D Connectivity Test (#558)
This test is destructive.
This connectivity test checks whether a specific PDATA port can establish a
level-2 LAP-D link. The active server assigns a LAP-D bearer link between a
TN2312 IPSI circuit pack’s Packet Interface circuit (i.e., an EPN’s packet-bus
interface, also called PKT-INT) and the PDATA port. The server initiates a test
packet from the PKT-INT to the PDATA port and expects to receive a reply from
the PDATA port. Failure of this test may indicate an on-board hardware-related
fault on the PDATA circuit pack.
Figure 8-31. Configuration for LAP-D Connectivity Test
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive; ND = Nondestructive
PDATA Port Local Loop-Around test (#602) X X ND
LAP-D Connectivity test (#558) X X D
System Port Connectivity test (#603) X X D
SPE
Packet Bus
EIA
P
D
A
T
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