Avaya S8700 Maintenance Manual page 916

Maintenance-Object Repair Procedures
g. Error Type 513 — The ATM Crosstalk test failed. The board is either
writing to or reading from a TDM time slot that is not allocated to the board.
1. Test the board (test board UUCSS), and follow the test procedures
h. Error Types 769 and 770 — are board-degraded alarm errors that result
when the ATM switch is sending corrupted cells or excessive AAL/LAP-D
retransmissions (off-board ATM cell corruption errors). These errors
indicate the detection of a problem in handling ATM cells that are received
from the fiber interface.
Aux Data:
Error
Type
769
769
770
771
The problem is most likely not on the ATM-EI circuit pack reporting the
errors, but it could be due to one or more of the following reasons:
Error Type 771 — The ATM switch is sending cells with unknown VPI and
VCI address (wrong connection).
1. Ensure that the ATM-EI board address on the ATM switch matches
i. Error Types 1024-1151 — These errors represent problems detected by
the ATM-EI board in response to SETUP and ADDPARTY requests from
software.
8-194 Issue 1 May 2002
suggested for this test. In random tests of a single DSP during low
or high traffic, the same DSP can be tested more than once.
Aux
Data Description
34 Excessive AAL-5 retransmission requests
35 Excessive LAP-D retransmission requests
25 Uncorrectable ATM cell headers – threshold
26 VPI, VCI pair unknown
The fiber is not snugly connected to either the board or the ATM
switch.
The EPN's packet bus is corrupting the cells. See
(Packet Bus)'' (Aux Data 35 only).
The fiber between the ATM switch and the ATM-EI is too long
(greater than 2 km for multimode fiber). Use loopback to see if the
fiber is corrupting the cells.
Some other ATM-EI board is not receiving the cells properly.
The intervening ATM switch is dropping the ATM cells due to a
shortage of bandwidth, or the S8700 Multi-Connect system is using
more than the subscribed bandwidth.
the ATM-EI (ATM) address on the S8700 Multi-Connect side.
The Error Types and descriptions are in
Aux Data values represent port network and angel numbers and are
in Table 8-82 on page 8-196.
''PKT-BUS
Table 8-81 on page 8-195.
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