NEC Electra Elite 192 Hardware Manual page 362

Issue 6
Bridge on
system CO
line?
No
Move suspected bad line to
good COI(8)-U10 ETU port.
Move good line to original
COI(8)-U10 ETU port.
Port
Problem
on port or
line?
Reset or replace
COI(8)-U10, and
test again.
Yes
Problem
solved?
No
1. Perform Second Initialization, and test.
2. Perform First Initialization, and test with
default program.
3. Replace CPUB( )-U10 ETU.
9 - 20
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 COI(8)-U10 ETU.
Electra Elite
No
All stations?
Replace
Multiline SLT.
Report Problem
to Telco.
System Maintenance