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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-488DIG-LINE (Digital Line)
10
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.
PASS Electronic Power Feed Test passed. The message to
turn on the power to the station was successfully sent to
the port.
1. Although this test will never actually return a FAIL
result except for the Internal System Error
described above, it will log an error indicating the
real results of the test. Check the Error Log for any
entries with Error Types 767 or 769 after the test
completes.
2. If Error Type 767 appears in the Error Log, this
should indicate that the test sensed no problems
with the power to the station. To verify that the station
is powered up correctly, run a self-test on the station,
if available, and check that all the feature buttons are
operating.
3. If Error Type 769 appears in the Error Log, this
indicates some problem with the power to the
station. Check for a short in the wiring, a damaged
jack, a defective voice terminal, or an incorrect type
of terminal.
Table 10-131. TEST #11 Digital Line Electronic Power Feed Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page