NEC UNIVERGE SV9100 System Maintenance Manual page 21

UNIVERGE SV9100
Check GCD-4COTA LED.
GCD-4COTA
LED Status?
On
Have Telco check Line
circuit(s).
System Maintenance Manual
Call Dropping
See if problem exists on all
No
dropped on
Check outside line key after
call drops.
Line Key
LED Status?
1. Perform Second Initialization. If trouble persists
Off
2. Replace
Return Defective blade for
C2
Lines.
Yes
Calls
all lines?
No
lines at same
time?
Increase Automatic Release Signal
Detection Time. Refer to PRG 14-02-09.
go to step 2.
GCD-4COTA. Test.
No
Problem
Solved?
Yes
repair.
All
Yes
Check DC voltages with a
meter and AC power with a
line disturbance analyser
Perform First Initialization.
Replace GCD-CP10, and test
system using default program.
Issue 1.0
9