ND-20292
CHAPTER 5
APRIL, 1990

Bl

Radio Frequency Interference (RFI)

Test to see if interference is only during outside
calls or anytime a station is off-hook.
More
than
2 pair
Ground all unused Twisted Twisted Pair No
pairs at MDF
0 *
Recable with 2-pair
Cable twisted cable
I
End
Check CO
system at MDF
Multiline Terminal
Check cable
of affected
MultilineTerminal(s)
I
Inform
TELCO
Follow the steps below, one at a time and test after each. (Refer to ETI No.
MK-006 in Chapter 6.)
1. Place a 0.01 microfarad (yF) capacitor across the receiver element in the
Multiline Terminal handset.
2. Place a 0.01 microfarad (pF) capacitor across pins 1 & 2 and pins 3 & 4 of
the handset connector harness on the solder side of the main PC board in
the Multiline Terminal.
L
2 Pair Twisted
Yes
r
No No Yes

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