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Maintenance Object Repair Procedures
555-233-123 10-728 Issue 4 May 2002
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 loopback 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.
Next, a Conference Test checks the primary information channel. This test is the
same as Conference Test #6.
The four tests will generate only one resulting value (Pass, Fail, or Abort). If any
test fails or aborts, the test sequence stops.
Table 10-272. 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. 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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