ND-20292
CHAPTER 5
APRIL, 1990
Intermittent Ring Problems
9
1 Line
Check memory block 1 t3 to
ensure line is programmed to
ring on an existing station
*es

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End
Run the following tests:
1. Measure CO ring voltage
with AC meter (100 vat
2OHz) at the MDF.
2. Perform a second
initialization.
3. Place an external ringer in
front of the system on a
worst case CO line. Find
out if the customer can
hear the external ringer at
times when the system
does not detect ringing on
this line.
4. Replace TSW-E and
test. If problem is not
solved, perform 1 st
initialization, replace CPU-
E ( ). Test system using
default program.
c
L

AlI Terminals eerminals

I
Replace at least one Multiline
Terminal which has problems.
Done
affected can be isolated
to one COI-E ETU
and deny the DND feature.
1 af%{~~~t$$$&d 1
Reset MMC-E ETU and test.
I ‘/
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