user manual

ND-20292
CHAPTER 5
APRIL, 1990
CO Signaling Problem
Check lines with test set to see if
Check Memory Block 48-l to
ensure line(s) are programmed
for rotary (DP)
I DTMFeRotar y I I DTMFeRotar y ,
.
Check lineswith
a test set to see if
they are DTMF or
Rotary
a test set to see if a test set to see if
,
I
1 Rotary
, YeseN ,
1. If lines are DTMF
increase the DTMF
duration in Memory
Blocks 48 - 1 & 6
2. If lines are Rotary
choose the 10 pps
option in Memory
Blocks 48 - 1 & 6
3. Check off-hook CO
line current
/
c
1. Reset COLE and test. &t;cble persists,
2.
Replace COLE and testH:f;rouble persists,
3. Reset MMC-E and tes;;:fiouble persists,
4. Reolace MMC-E and test. If trouble persists,
THEN
5. Resest TSW-E and tes;;piouble persists,
6.
Replace TSW-E and te;st.;fNtrouble persists,
7. Perform 2nd initialization and test. If trouble
persists,
THEN
8. Perform 1st initialization and test. If trouble
persists,
THEN
9. ReplaceCPU-E( ).
Monitor line with a test set
and verify if system is
sending digitscorrectly
500 -13