NEC UNIVERGE SV9100 System Maintenance Manual page 34

Issue 1.0
Bridge on
system CO
line?
No
Move suspected bad line to
good GCD-4COTB port. Move
good line to original
GCD-4COTB port.
Port
Problem
on port or
line?
Reset or replace
GCD-4COTB and
test again.
Yes
Problem
solved?
No
1. Perform Second Initialization, and test.
2. Perform First Initialization, and test with
default program.
3. Replace GCD-CP10.
2 - 18
No
Yes
Remove it.
Line
Check line with dB
meter and/or contact
Telco.
Done.
F1
Low Volume Problems
Yes
All lines?
Yes
Run a dB level test at DMARK
on lines with 1 kHz test tone. No
less than -8dB at MDF is
required.
Yes
Less than
-8 dB?
No
Replace GCD-4COTB.
UNIVERGE SV9100
No
All stations?
Replace
Multiline SLT.
Report Problem
to Telco.