Guardian Telecom
Installation and Operation
HDE-VoIP Series Telephones
Page 16
12.2. Connecting a Device to the Auxiliary Relay
The HDE-VoIP Telephone incorporates one on-board relay located on the PCBA, which
enables users to control a low current external relay or device. An external relay could control a
ringer, strobe light, door lock or any other apparatus. The on board relay is protected by a 1
Amp, non-replaceable fuse.
Power switched by the relay should not exceed the
rating of the fuse. Consideration of a safety factor is recommended.
See: Figure 9 - Terminal
Block Connections
Warning: The relay circuitry contains a non-replaceable 250VAC 1A fuse. If the fuse
blows the board must be returned to Guardian or an approved service center for repair.
The Telephone relay activation time is selectable through the web interface on the Device
Configuration Page. The relay is controlled by DTMF tones generated from the phone to which
the VoIP phone is connected; no matter which one initiated the call. The DTMF tones are
selectable from the web interface as well.
See: Manual P007402
Setup and Configuration
Note:
The three-digit code for the auxiliary relay must be sent in conformance with RFC2833
DTMF generation.
Note:
Firmware version 3.4.0 or later requires a "#" to execute the DTMF command. Example
321# - activate relay.
