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DAT-LINE (Data Line)
Issue 5 October 2002
983
555-233-119
Digital Loop Around Test (#171)
The Digital Loop Around Test checks the Data Line’s ability to transmit and
receive data on the TDM Bus. Data is sent through Data Channel 3 (data channel
port 3) over the TDM Bus, internally looped through the Data Line back onto the
TDM Bus, and received again by Data Channel 3.
If data channel 3 is in use or not administered, this test aborts. This test may fail if
Network Control Data Channel 3 is not functioning properly. If there are any
DATA-CHL errors in the Error Log, refer to the DATA-BD (Data Channel Processor
circuit pack) Maintenance documentation to clear them up first. This test passes
regardless of any customer equipment that may be connected to the port, as long
as the port is not in use by the equipment.
Table 183. TEST #171 Digital Loop Around Test
Error
Code Test
Result Description/Recommendation
ABORT Internal system error
1. Retry the command at 1-minute intervals a maximum of 5 times.
1000 ABORT System resources required to run this test are not available. The port may
be in use on a valid call. Use status data-module to determine when the
port is available for testing.
1. Retry the command at 1-minute intervals a maximum of 5 times.
1005
1007 ABORT Data Channel 3 is not administered. This port is required to run this test.
1. Verify that data channel 3 is not administered with the list data-module
command. Administer data channel 3 with the add data-module
command, and run this test again.
1016 ABORT Data Channel 3 is busy. The port may be in use on a valid call. Use status
data-module to determine when the port is available for testing.
1. Retry the command at 1-minute intervals a maximum of 5 times.
1020 ABORT The test did not run due to an already existing error on this port (Error Type
769).
1. Reseat the circuit pack and look in the Error Log. If Error Type 769 still
occurs on this port, replace the circuit pack.
2000 ABORT Response to the test request was not received within the allowable time
period.
1. Retry the command at 1-minute intervals for a maximum of 5 times.
2. If the test continues to abort, escalate the problem.
2003 ABORT Failed to receive an off-hook from the Data Line.
1. Retry the command at 1-minute intervals a maximum of 5 times.
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