Bosch Appliances D9112 D128 Dual Phone Line Switcher, Ground Start Jumper, Description, Operation

LOOP START

POSITION

Ground Start Jumper

GROUND START

POSITION

8
9	COMMON
10	EARTH GROUND
LINE SNIFFER SELECT
		Loop Start
		Ground Start
TELCO CORD
MODEL No. D161
		RED
		Requires
GROUND Optional Relay
START		Model No. D136

M

The ground start jumper is above the TELCO

connector and TELTEST point at the lower left Figure 9: Ground Start Jumper 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.

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.

	D9112 Operation & Installation Manual
74-06144-000-C 2/96	Page 30	© 1993-1996 Radionics