NEC Univerge SV9100 - Page 20

Issue 1.0
UNIVERGE SV9100
8
System Maintenance
C1
Done.
Reset/ Replace G CD-
4COTA.
Perform the following tests:
1. Measure CO ring voltage with AC meter (100 Vac 20 Hz) at
the MDF.
2. Perform second initialization
3. Place external ringer in front of system on worst case CO line.
Check if customer can hear external ringer at times when the
system does not detect ringing on this line.
4. If problem is not solved, perform First Initialization and
replace CD-CP00. Test system using default program.
Done.
Replace CAT 5 cable between
chassis.
Test to see if problem occurs on one
line or several lines.
Check PRG 22-04 to ensure that line is
programmed to ring on an installed station.
See if problem occurs on all
Multiline Terminals Assigned
Ringing.
Replace one terminal that has
problems.
Program station for off-hook and
day/night ring, deny DND feature, and test
again.
Program ring assignment
a
..
nd
test.
See if affected lines can be
isolated to One G CD-
4COTA.
Return defective Multiline
Terminal for repair.
Check whether or not
affected lines can be i
.
solated
to one chassis.
No or Intermittent CO/PBX Ring
One Line
Several Lines
Occurrence?
Yes
All Terminals
Ringing
Assigned?
Occurrence?
Not all terminals
No
Still have
Problem?
Not Cleared
Cleared
Yes
No
Yes
No
End.
Corrected?
Corrected?
Yes
1 GCD-4COTA?
No
No
Yes
Corrected?
Yes
Controlling
Chassis?
No