Connecting Off-Premise Telephones - Nortel Meridian 1 Planning And Installation Manual

Page 294 of 590

Connecting off-premise telephones

553-3021-209 Standard 1.00
Chapter 17 — Connecting the telephones
Connect off-premise analog (500/2500-type) telephones through an
NTAK92AA Off-Premise Protection Module. Each module can connect up
to four analog (500/2500-type) telephones and can interface with one of the
following:
• NT1R20 Off-Premise Station Analog Line Card
• NT8D03 Analog Line Card
• NT8D09 Message Waiting Line Card
The message waiting line card produces -150 volts which is considered
hazardous on off-premise telephones. Make sure that the -150 V is
disabled on off-premise telephones.
The voltage is disabled when the telephone's Class of Service (CLS) is
Message Waiting Lamp Denied ( LPD) and Message Waiting Denied
(MWD) in Overlay 10.
Refer to the X11 Software guides for information about Overlay 10.
Do not assign a Class of Service of LPA or MWA to an off-premise
telephone.
July 1999
WARNING