Avaya MCC1 Maintenance Procedures page 236

Packet and serial bus maintenance
Isolating and repairing packet-bus faults
NOTE:
Bold-face letters in the flowchart are explained in
Figure 71: Troubleshooting packet-bus problems (2 of 2)
NOTE:
Bold-face letters in the flowchart are explained in
Flowchart notes
The following paragraphs refer by letter to corresponding entries in
bus problems (1 of 2),
236. Individual errors and alarms are listed in individual maintenance objects. Any that do not refer
explicitly to the TDM bus (except TDM-CLK) can be a possible cause of packet-bus problems.
236
From
A
page
1
G
Is a
YES
TN771 present
in this port
network?
NO
I
Place the TN771
in standalone mode
J
Does the
NO
TN771 indicate
packet bus
faults?
YES
M
Follow the packet
bus fault isolation and
correction procedures
Are the
NO
packet bus
problems
resolved?
YES
END
on page 235 and Figure 71, Troubleshooting packet-bus problems (2 of 2),
Flowchart notes
H
Are there
YES
alarms or errors
against
M/T-PKT?
NO
NO
K
Is the
YES
problem isolated
port and/or endpoint
to a single
board?
NO
NO
Escalate
the
problem
Flowchart notes
Figure 70, Troubleshooting packet-
on page 236.
Follow the repair
procedure for
M/T-PKT
Are the
packet bus YES
problems
resolved?
END
L
Follow the board,
repair procedures
Are the
YES
packet bus
problems
resolved?
END
fcdfpbp2 RPY 101397
on page 236.
on page
Maintenance Procedures
December 2003