NEC Electra Elite IPK II System Hardware Manual page 622

Document Revision 3
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heck COI(8)-U10 LED.
C
COI(8)-U10
LED Status?
On
Have Telco check
Line circuit(s).
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14 - 10
See if problem exists
on all Lines.
No
Check outside line key
after call drops.
On
CO
Line Key
LED Status?
Off
1. Perform Second Initialization.
If trouble persists go to step 2.
2. Replace COI(8)-U10 ETU. Test.
C2
Call Dropping
Yes
Calls
dropped on
all lines?
No
lines at same
Off
Have Telco check line circuits.
Increase Automatic Release
Signal Detection Time. Refer to
PRG 14-02-09.
No
Problem
Solved?
Yes
Return Defective ETU
for repair.
Electra Elite IPK II
Yes
All
time?
Check DC voltages with
a meter and AC power
with a line disturbance
analyzer.
Perform First Initialization.
Replace CPUII( )-U( ) ETU,
and test system using
default program.
System Maintenance