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D9112 Operation & Installation Manual
Page 30
74-06144-000-C 2/96
© 1993-1996 Radionics
LINE SNIFFER SELECT
8
9
10
RED
GROUND
START
EARTH GROUND
COMMON
Ground Start
Loop Start
TELCO CORD
MODEL No. D161
Requires
Optional Relay
Model No. D136
M
LOOP START
POSITION
GROUND START
POSITION
Ground Start Jumper
The ground start jumper is above the TELCO
connector and TELTEST point at the lower left
corner of the panel. Set it in the ground start
position. See Figure 9.
Ground start not for use in NFPA applications:
You can not use ground start
telephone systems for NFPA 71 Central Station Protective Signaling or NFPA 72 (Chap.
8) Remote Station applications.
Figure 9: Ground Start Jumper
D128 Dual Phone Line Switcher
Description
The optional D128 Dual Phone Line Switcher allows the D9112 to transmit reports over a
primary or secondary phone line. The D9112 monitors both phone lines. You can hear a
relay click as the D128 switches between the two phone lines.
Do NOT use the instructions packaged with the D128:
The manual packaged with the
D128 Dual Phone Line Switcher does not include complete instructions for connecting
the module to the D9112 panel. Use the instructions that follow.
Set the ring count above 2 on answering machines:
The D9112's RAM Monitor
feature may not operate correctly if you connect an answering machine with a ring count
of less than 2 rings, to a phone line used by the D128 module.
Operation
The D9112 always uses the primary phone line to initiate phone calls, unless it has been
detected as faulty. See
Phone Line Monitor
in this manual for a description of the
D9112’s phone line monitor operation.
See the
Phone
section of the
Panel Wide Parameters
module of the
D9112 Program
Entry Guide
(74-06145-000) for phone supervision and reporting options. You must set
the
Two Phone Lines
prompt to YES to use the D128.