Maintenance Object Repair Procedures
555-233-123
10-232 Issue 4 May 2002
d. Error Type 125: an ATM trunk is administered but a non-ATM-TRK circuit
pack is installed in the corresponding slot. You have two options:
■ Replace the incorrect circuit pack with an ATM-TRK circuit pack.
■ Or re-administer the slot for the circuit pack that is physically
present, locate the slot where the ATM-TRK circuit pack is actually
installed, and re-administer the ATM trunk.
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.
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.
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