Avaya S8700 Maintenance Manual page 182

Maintenance Object Repair Procedure
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.
Order of Investigation
PDATA Port Local Loop-Around test (#602)
LAP-D Connectivity test (#558)
System Port Connectivity test (#603)
1. D = Destructive; ND = Nondestructive
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
8-878 Issue 1 May 2002
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Short Test Long Test
Sequence Sequence
X X
X X
X X
P
Packet Bus
D
A
T
A
1
D/ND
ND
D
D
EIA
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