GAI-Tronics ICP9000 Navigator Series Console Installation and Service Manual - Manual (Page 60)

Features and Options ICP9000 Navigator Installation and Service Manual
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External Enhanced Full Duplex Phone Interface CP0060 (Option Code CTH)
This optional interface includes a telephone interface board. It allows connection to an external telephone
unit, such as a 911 phone, and adds inbound phone call capability, phone patch, and radio patch. Refer to
Table 18 for the pin description of the external phone interface connector.
Table 18. External Phone Interface Connector Pin Description
J400
Pin #*
Description
1 Off-Hook Sense
2 Ring Mute Contact Closure
3 Handset TX Audio
4 Handset RX Audio
5 Handset RX Audio
6 Handset TX Audio
7 Ring Mute Contact Closure
8 Off-Hook Sense
*looking into connector, pin 1 is on the left
To activate the off-hook sense, pin 1 (or pin 8) should be connected to a 3–12 V dc source. When pin 8
(or pin 1) is grounded, the off-hook sense is activated. When activated, the console either automatically
takes the phone off-hook (if possible) or provides a ringing indication that an off-hook request is being
made. Refer to the ICP9000 Navigator Series Console Operator’s Manual, Pub. 43004-025, for user
instructions for the External Phone Interface option.
The ring mute provides a closure across pins 2 and 7 to deactivate an external ringer when the phone is
accessed.