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DIG-LINE (Digital Line)
Issue 4 May 2002 10-577 555-233-123
Voice and Control Channel Local Loop Test (#13)
These tests check the information and control channels between the Switch
Processing Element (SPE) and the Digital Line port circuit. The SPE sends a
message to loop around both the information and control channels for the port.
First, the primary information (voice) channel loop back test is run. The test is
performed by sending a digital count from the Tone-Clock circuit pack on the
primary information channel time slot and receiving 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 is performed. This test consists of sending four different
transparent patterns to the on-board microprocessor, receiving them back, and
comparing them.
The Loop Around Test for the secondary information (data) channel is then
performed. This test is the same as the primary information channel loop around
test and is performed only if a DTDM is administered.
A Conference Test is done next for the primary information channel. This test is
the same as Conference Test #6.
Only one value (Pass, Fail, or Abort) is generated as a result of four tests run. If
any test fails or aborts, the sequence is stopped.
Table 10-214. TEST #13 Voice and Control Channel Local Loop 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 busy with a valid call. Use display port
PCSSpp 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 service state
indicates that the port is in use, then the port is unavailable for
certain tests. You must wait until the port is idle before
retesting. Attendants are always in use (off-hook) if the
handset is plugged in and the port is not busied out.
1. If the port status is idle, then retry the command at
1-minute intervals a maximum of 5 times.
1001 ABORT System resources required to run this test are not available.
1. Retry the command at 1-minute intervals a maximum of 5
times.
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