User manual
DEFINITY ECS Release 8.2 Maintenance for R8.2csi 
555-233-119  Issue 1
April 2000
Maintenance Objects 
3-456DAT-LINE (Data Line) 
3
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 3-194. TEST #36 Audit Update Test 
Error 
Code
Te s t 
Result Description/ Recommendation
1000 ABORT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals for a maximum of 5 times.
2. Escalate the problem if the test continues to abort.
1006 ABORT The test did not run due to an already existing error on this port (Error Type 
769).
1. Refer to the procedure for Error Type 769. 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.
2100 ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals a maximum of 5 times.
7 FAIL Internal system error
1. Retry the command at 1-minute intervals a maximum of 5 times.
PASS The hardware port state is consistent with the software state. User-reported 
troubles on this port should be investigated using other port tests, 
examining the ADU, external wiring, and customer equipment.
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