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ATM-EI (Expansion Interface Circuit Pack)
Issue 1 June 2005 533
f. Error Type 131: An ATM-EI circuit pack has been removed from the slot for 5 minutes.
1. Insert the ATM-EI circuit pack into its administered slot.
2. Another way to resolve or prevent this alarm is to remove the ATM-EI administration (see
Basic ATM PNC Administration
on page 528), then remove the ATM-INTF administration
(change circuit-pack).
It is possible that the ATM-EI could be held in reset by the PN’s Maintenance board and is
not inserted in the system.
3. Try issuing test maint P long on the maintenance board in the same PN.
g. Error Type 257: Expansion Interface Control Channel test (#316) failed (board cannot
communicate on the TDM bus control channel). Follow the suggested test procedures.
Error Type 258: The archangel is out of sequence (Aux Data indicates angel number).
Error type 259: The expansion archangel link (EAL) to the active ATM-EI board is down.
See SYS-LINK (System Links)
on page 2175.
h. 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 location), and follow the test procedures 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.
i. Error Types 769 and 770: are board-degraded alarm errors that result when the ATM
switch is sending corrupted cells or excessive AAL/LAPD 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 for these Error Types:
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:
● The fiber is not snugly connected to either the board or the ATM switch.
● The PN’s packet bus is corrupting the cells. See PKT-BUS (Packet Bus) on page 1790
(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.
Error Type Aux Data Description
769 34 Excessive AAL-5 retransmission requests
769 35 Excessive LAPD retransmission requests
770 25 Uncorrectable ATM cell headers – threshold
771 26 VPI, VCI pair unknown