Echo Canceller Test (#1420)

CAUTION:	This test is executed only for MM710 Media Modules that have been administered on the DS1 Media Module form to provide echo cancellation. The MM710 must be busied out before this demand test is run. This test is for the MM710 Media Module. The test originates from a manually initiated test board long demand test of a TMM710 Media Module. The test instructs firmware to test the echo cancellation circuity. The MM710 firmware tests echo cancellation on a subset of channels. If any channel fails twice, or if any two channels fail once, the test fails, and echo cancellation is bypassed on all channels of the board. Otherwise the test passes, and echo cancellation is configured to the administered parameters.

Table 74. Test #1420 Echo Canceller Test �
Error Code	Test Result	Description/ Recommendation
1015	ABORT	The board is not busied out. This test will abort if the DS1-MM Media Module under test is in service.
2000	ABORT	Response to the test was not received within the allowable time period. This may be due to hyperactivity. Error Type 1538 in the error log indicates hyperactivity. The hyperactive Media Module is out of service and one or more of the following symptoms may be exhibited. The DS1-MM tests (such as Test #138 and Test #139) are aborting with error code 2000. The tests run on the ports of this Media Module are returning a no board result. A busyout or a release command has no affect on the test results. A list config command shows that the Media Module and the ports are properly installed. When hyperactivity occurs, the Media Module is isolated from the system, and all of the trunks for this Media Module are placed into the out of service state. The system will try to restore the Media Module within 15 minutes. When no faults are detected for 15 minutes, the DS1-MM interface Media Module is restored to normal operation. All of the trunks for the DS1-MM interface Media Module are then returned to the in service state. Hyperactivity is often caused by the associated facility. In such a case, faults (such as slips, misframes, or blue alarms) would be entered in the error log. In addition, many hardware errors would be logged against the associated trunk circuits. If the facility is OK and the error occurs again after 15 minutes, replace the Media Module.
2012	ABORT	Internal system error. Retry the command at 1-minute intervals for a maximum of 5 times.
2100	ABORT	Could not allocate the necessary system resources to run this test. Retry the command at 1-minute intervals for a maximum of 5 times.
2500	ABORT	Internal system error. Retry the command at 1-minute intervals for a maximum of 5 times.
1400, 1401	FAIL	The Echo Cancellation Test has failed: Error 1400 - Echo canceller function failed. The Echo Canceller Function Test, which is executed by firmware, failed. Error 1401 - Echo canceller memory failed. The Echo Canceller Memory Test, which is executed by firmware, failed. Echo Cancellation is no longer being supplied by the board. Clear the alarm using the following commands: busyout board GGGVS, test board GGVS long, release board GGVS. If the test still fails, replace the Media Module. When this test fails, echo cancellation will be bypassed on all channels on the board. The Media Module can still be used for a E1/T1 line interface without echo cancellation. This capability provides limited service for the customer until the Media Module can be changed out.
	PASS	The Echo Cancellation feature is functioning properly.
Any	NO BOARD	The test could not relate the internal ID to the port (no board). This could be due to incorrect translations, no board is inserted, an incorrect board is inserted, or an insane board is inserted. Ensure that the board translations are correct. Execute the add ds1 GGGVS command to administer the MM-DS1 interface if it is not already administered. If the board was already administered correctly, check the error log to determine whether the board is hyperactive. If this is the case, the board is shut down. Reseating the board will re-initialize the board. If the board was found to be correctly inserted in step 1, then issue the busyout board command. Issue the reset board command. Issue the release busy board command. Issue the test board long command. This should re-establish the linkage between the internal ID and the port.

Table 74. Test #1420 Echo Canceller Test �

Error Code

Test Result

Description/ Recommendation

1015

ABORT

The board is not busied out. This test will abort if the DS1-MM Media Module under test is in service.

2000

ABORT

Response to the test was not received within the allowable time period. This may be due to hyperactivity. Error Type 1538 in the error log indicates hyperactivity. The hyperactive Media Module is out of service and one or more of the following symptoms may be exhibited.

The DS1-MM tests (such as Test #138 and Test #139) are aborting with error code 2000.

The tests run on the ports of this Media Module are returning a no board result.

A busyout or a release command has no affect on the test results.

A list config command shows that the Media Module and the ports are properly installed.

When hyperactivity occurs, the Media Module is isolated from the system, and all of the trunks for this Media Module are placed into the out of service state. The system will try to restore the Media Module within 15 minutes. When no faults are detected for 15 minutes, the DS1-MM interface Media Module is restored to normal operation. All of the trunks for the DS1-MM interface Media Module are then returned to the in service state. Hyperactivity is often caused by the associated facility. In such a case, faults (such as slips, misframes, or blue alarms) would be entered in the error log. In addition, many hardware errors would be logged against the associated trunk circuits. If the facility is OK and the error occurs again after 15 minutes, replace the Media Module.

2012

ABORT

Internal system error.

Retry the command at 1-minute intervals for a maximum of 5 times.

2100

ABORT

Could not allocate the necessary system resources to run this test.

Retry the command at 1-minute intervals for a maximum of 5 times.

2500

ABORT

Internal system error.

Retry the command at 1-minute intervals for a maximum of 5 times.

1400,
1401

FAIL

The Echo Cancellation Test has failed:

Error 1400 - Echo canceller function failed. The Echo Canceller Function Test, which is executed by firmware, failed.

Error 1401 - Echo canceller memory failed. The Echo Canceller Memory Test, which is executed by firmware, failed.

Echo Cancellation is no longer being supplied by the board. Clear the alarm using the following commands: busyout board GGGVS, test board GGVS long, release board GGVS. If the test still fails, replace the Media Module.

When this test fails, echo cancellation will be bypassed on all channels on the board. The Media Module can still be used for a E1/T1 line interface without echo cancellation. This capability provides limited service for the customer until the Media Module can be changed out.

PASS

The Echo Cancellation feature is functioning properly.

Any

NO BOARD

The test could not relate the internal ID to the port (no board). This could be due to incorrect translations, no board is inserted, an incorrect board is inserted, or an insane board is inserted.

Ensure that the board translations are correct. Execute the add ds1 GGGVS command to administer the MM-DS1 interface if it is not already administered.

If the board was already administered correctly, check the error log to determine whether the board is hyperactive. If this is the case, the board is shut down. Reseating the board will re-initialize the board.

If the board was found to be correctly inserted in step 1, then issue the busyout board command.

Issue the reset board command.

Issue the release busy board command.

Issue the test board long command.

This should re-establish the linkage between the internal ID and the port.