Grandstream Networks GXV3601 User Manual page 43

How Alarm_Input and Alarm_Output Work
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"Alarm_In" is the alarm input port. Users are able to connect 3 par t y sensors such as infrared
sensor, smoke sensor or light sensor to it.
The detectable signal voltage range for "Alarm-In" is from 1.8V to 15 V
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"Alarm-Out" uses relays as a switch (30VAC/2A). Users can connect 3 party devices such as
alarm siren or alert light to this port. Under normal circumstances, the circuit is open. When there
is an alarm event, the GXV3601_HD will close the circuit to trigger the alarm.
NOTE:
 Please do NOT connect a device that has a signal voltage higher than 15V, this will damage
the GXV3601_HD.
How to connect an Alarm Output Equipment to GXV3601_HD
Here is a sample connection diagram. Connect the alarm output equipment to the GXV3601_HD
by following the diagram below.
Grandstream Networks, Inc. GXV3601_HD User Manual Page 43 of 59
Firmware Version 1.0.4.43 Last Updated: 08/2013