
ATM-TRK (Circuit Emulation Service Circuit Pack)
Issue 5 October 2002
763
555-233-119
e. Error Type 257: Control Channel Loop Test #52 failed. The circuit pack is
not properly connected with the control channel on the TDM bus.
1. Take the corrective action specified by Test #52.
f. Error Type 513: ATM Crosstalk Test (#1298) failed. The board is writing to
or reading from a TDM time slot that is not allocated to the board, or the
Digital Signal Processor (DSP) selected for this test has malfunctioned.
1. Run test board UUCSS.
2. Take the corrective action specified for Test #1298.
g. Error Type 769, 770: the ATM switch is requesting too many LAPD
retransmissions (off-board ATM cell corruption errors).
1. Check the connections between the fiber cable, the ATM-TRK circuit
pack, and the ATM switch.
2. See PKT-BUS (Packet Bus) for test and corrective procedures.
3. Determine what type of fiber is installed between the ATM-TRK
circuit pack and the ATM switch.
4. Perform ATM loopback tests on the near-end ATM-TRK circuit pack
and on the far-end circuit pack or ATM switch.
Error Type
Aux Data
Description
769
35
LAPD excessive retransmission requests
770
25
ATM uncorrectable cell headers - threshold
If Then
There is multimode fiber
Check the length of the fiber. If the
cable is longer than 2 km, it is probably
causing the errors.
There is single-mode fiber or
the length of the multimode
fiber is less than 2 km
The source of the errors can lie in the
ATM facility, the ATM-TRK circuit pack,
or the far-end circuit pack.
If Then
The ATM-TRK circuit pack
fails the loopback test.
The problem is in the ATM-TRK circuit
pack. Replace the circuit pack.
The far-end circuit pack or
ATM switch fails the
loopback test.
The problem is in the far-end circuit pack
or ATM switch. Consult the circuit-pack or
ATM switch documentation for advice.
The equipment at each end
of the ATM span passes
the loopback test
The problem is somewhere in the ATM
span. Lack of bandwidth can be forcing
an intermediate ATM switch to drop cells.
Содержание DEFINITY Server CSI
Страница 1: ...Maintenance for Avaya DEFINITY Server CSI Volumes 1 and 2 Release 1 2 555 233 119 Issue 5 October 2002...
Страница 6: ......
Страница 20: ...Contents 555 233 119 20 Issue 5 October 2002...
Страница 30: ...About this Book 555 233 119 30 Issue 5 October 2002...
Страница 944: ...Maintenance Objects 555 233 119 944 Issue 5 October 2002...
Страница 1397: ...MMI BD Issue 5 October 2002 1397 555 233 119 Figure 44 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1409: ...MMI PT Issue 5 October 2002 1409 555 233 119 Figure 45 TN787 Multimedia Interface MMI Circuit Pack...
Страница 1891: ...VC DSPPT Issue 5 October 2002 1891 555 233 119 Figure 63 VC Circuit Pack DSP Port Local TDM Loopback Test...
Страница 1902: ...Maintenance Objects 1902 Issue 5 October 2002 Figure 65 VC Circuit Pack Summer Port Loopback Test...