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MG-DS1 (DS1 Interface Media Module)
Issue 1 June 2005 1601
Echo Cancellation is no longer being supplied by the board. Clear the alarm using the
following commands: busyout board location, test board location long,
release board location. If Test #1420 (Echo Canceler Test) fails, replace the Media
Module.
l. Error Type 1537: is a LAN Bus Timeout Error.
This error occurs when the Media Module transmits too many bytes on the LAN bus for a
single frame. This condition may be caused by an on-board fault or by faulty data received
on one of the Media Module’s external ports. If any of the ports on this Media Module are
alarmed, refer to the repair procedures for those maintenance objects.
If the error occurs three times within 10 minutes, the board is isolated from the Packet Bus
and the board alarmed. To clear the alarm and restore the board to the Packet Bus, use the
commands busyout board location, reset board location, test board
location long, release board location.
If the problem persists, and there are no PKT-BUS alarms or port alarms, then replace the
Media Module.
m. Error Type 1538: The hyperactive Media Module is out-of-service and may exhibit one or
more of the following symptoms:
● The common Media Module level tests such as Test #50 abort with Error Code 2000.
● The tests run on the ports of this Media Module return a NO-BOARD result.
● A busyout/release of the Media Module has no affect on test results.
● A list configuration command shows that the Media Module and ports are
properly installed.
The Media Module is isolated from the system and all trunks or ports on this Media Module
are placed into the out-of-service state. The system will try to restore the Media Module
within 20-30 minutes. When no faults are detected for 20-30 minutes, the MM710 is
restored to normal operation. All trunks or ports of the MM710 are then returned to the
in-service state.
If the board is not restored to normal operation, or the error recurs after the board was
restored to normal operation, escalate the problem.
n. Error Types 3073 to 3160: Error Type 3073 shows that this board is receiving slips and the
AUX Data “minus 3072” shows the last slip count reported.
o. Error Types 3585 to 3601: Error Type 3585 shows that this board is receiving misframes,
and the AUX Data “minus 3584” shows the last misframe count reported.