NEC Univerge SV8100 System Maintenance Manual page 25

UNIVERGE SV8100
Ground all unused
pairs at MDF.
RFI Cleared?
Yes
End
Follow the steps below, one at a time, and test after each step.
1. Place a 0.01 microfarad ceramic capacitor (0.001 microfarad for FM Interference)
across receiver and transmitter elements in the Multiline Terminal handset.
2. Add a 0.01 microfarad ceramic capacitor from one transmit lead to one receive lead.
System Maintenance Manual
B1
Frequency Interference (RFI)
Is interference only on outside calls
or anytime station is off-hook?
RFI Event?
Any off-hook
Check cable for the
affected terminal(s).
More than 1-pair
Twisted
Twisted
pair?
No
Outside calls
No
Cable with 1-pair twisted
pair cable.
No
RFI Cleared?
Yes
End
Issue 1.0
Remove one CO line
at MDF and test using
standard SLT.
No
RFI on CO
Lines?
Yes
Inform
Telco.
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