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Communication Manager Maintenance-Object Repair Procedures
1526 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
j. Error Type 769: Transmit FIFO Underflow (threshold is 3 errors within 10 minutes); the
circuit pack cannot find the “end of frame” bit when transmitting a frame to the packet bus.
1. Clear the alarm with:
a. busyout board location
b. reset board location
c. test board location long clear
d. release board location
2. If the error recurs within 10 minutes, replace the circuit pack. See Shutting Down NT on
the TN802 on page 1529 before removing the circuit pack.
k. Error Type 770: Unable to Write LAN Translation RAM (threshold is 2 errors within 10
minutes); a call is aborted because there are no available translation RAM locations for the
call connection attempt.
1. Clear the alarm with:
a. busyout board location
b. reset board location
c. test board location long clear
d. release board location
2. If the error recurs within 10 minutes, replace the circuit pack. See Shutting Down NT on
the TN802 on page 1529 before removing the circuit pack.
l. Error Type 1537: There was a LAN Bus Timeout because the circuit pack transmitted too
many bytes on the LAN bus for a single frame. This condition may be caused by:
● an on-board fault
● faulty data received on one of the circuit pack’s external ports. If any of the ports on this
circuit pack are alarmed, refer to the repair procedures for those MOs.
If the error occurs 3 times within 10 minutes, the system raises the board alarm and isolates
it from the packet bus.
1. Clear the alarm and restore the board to the packet bus:
a. busyout board location
b. reset board location
c. test board location long clear
d. release board location
2. If the problem persists, and there are no PKT-BUS alarms or port alarms, replace the
circuit pack. See Shutting Down NT on the TN802
on page 1529 before removing the
circuit pack.