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E-DIG-STA (Emulated Digital Line)
Issue 1 June 2005 1129
Voice and Control Channel Local Loop Test (#13)
These tests check the information and control channels between the media server and the
Digital Line port circuit. The media server sends a message to loop around both the information
and control channels for the port. First, the primary information (voice) channel loop-back test
sends a digital count from the Tone-Clock circuit pack on the primary information channel time
slot and receives the same digital count with a General-Purpose Tone Detector.
While the primary information channel is still looped around, the Control Channel Loop-around
test sends four different transparent patterns to the on-board microprocessor, receives them
back, and compares them.
The Loop Around test for the secondary information (data) channel is the same as the primary
information channel loop around test and is performed only if a DTDM is administered.
A Conference test checks the primary information channel. This is the same test as Conference
test (#6).
The four tests generate only one result: Pass, Fail, or Abort. If any test fails or aborts, the test
sequence stops.
Table 384: Test #13 Voice and Control Channel Local Loop Test
Error
Code
Test
Result
Description / Recommendation
ABRT Internal system error
1. Retry the command at 1-minute intervals up to 5 times.
1000 ABRT System resources required to run this test are not available. The port may
be busy with a valid call.
1. Use display port location to determine the station extension or
attendant number of the port. Use status station or status
attendant to determine the service state of the port. If the port is in
use, wait until it is idle before retesting. Attendants are always in use
(off-hook) if the handset is plugged in and the port is not busied out.
2. If the port status is idle, then retry the command at 1-minute intervals
up to 5 times.
1001 ABRT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals up to 5 times.
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