Small Office Install
Small Office Edition Installation Manual
Page 44
IP Office 3.0
40DHB0002UKED Issue 3 (4th February 2005)
External Control Port (3.5mm Stereo Jack Socket)
Pin No.
Description
1 Circuit
1.
2 Circuit
2.
3 0
Volts
(Ground/Chassis)
4 Not
connected.
5 Not
connected.
Control Circuit
Information
Control Circuit 1 Pin 2 and Pin 3, ensure that Pin 2 is at a positive voltage with respect to Pin 3.
Control Circuit 2 Pin 1 and Pin 3, ensure that Pin 1 is at a positive voltage with respect to Pin 3.
Each circuit can be switched independently.
Switch Setting
Information
ON
Low resistance between Pins.
OFF
High resistance between Pins.