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Electra Elite
C heck COI(8)-U10 LED.
COI(8)-U10
LED Status?
On
Have Telco check
Line circuit(s).
System Hardware Manual
Call Dropping
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
Yes
Calls
dropped on
all lines?
No
lines at same
Off
Have Telco check line circuits.
Increase Automatic Release
Signal Detection Time. Refer
to Memory Block 3-40.
No
Problem
Solved?
Yes
Return Defective ETU
for repair.
Yes
All
time?
Check DC voltages
with a meter and AC
power
with
disturbance analyzer.
Perform First Initialization.
Replace CPUB(
)-U10,
and test system using
default program.
Issue 6
a
line
9 - 11
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