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Issue 6
Check Memory Blocks 4-01 and 4-02
to ensure that line is programmed to
ring on an installed station.
Ringing
Assigned?
Program ring assignment
. .
and test.
Yes
End.
Corrected?
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 B48-U10 KSU.
5. Test system using default program.
10 - 10
No or Intermittent CO/PBX Ring
Test to see if problem occurs
on one line or several lines.
One Line
Yes
No
No
Return defective Multiline
Terminal for repair.
C1
Several Lines
Occurrence?
All Multiline Terminals
Yes
Still have
Problem?
No
See if affected lines
can be isolated to
one COI(8)-U( ) ETU.
1 COI(8)-U( )
ETU?
No
Electra Elite
See if problem occurs
on all Multiline Terminals
Assigned Ringing.
Occurrence?
Not all terminals
Replace one terminal
that has problems.
Program station for off-hook and
day/night ring, deny DND feature
and test again.
No
Corrected?
Yes
Reset/ Replace
COI(8)-U( ) ETU.
No
Corrected?
System Maintenance
Yes
Done.
Yes
Done.
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