Grandstream Networks GDS3705 User Manual

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GDS3705 User Manual
Version 1.0.1.16
Protection Diode
When connecting the GDS3705 to a door strike it is recommended to set an EMF protection diode in reverse
polarity for a secure use, below examples of deployment for the protection diode.
Figure 16: Protection Diode - Example 1
The reverse EMF protection diode must always be installed in reverse polarity across the door strike.
Figure 17: Protection Diode - Example 2
Connection Examples
Below examples, show how to use wiring on the back cover of the GDS3705 to connect with external
devices. The “NO” (Normal Open) model strike is used as example, “NC” (Normal Closed) should be similar
and users need to decide which model (NO or NC) to be used on the door.

Grandstream Networks GDS3705 Specifications

General

Brand	Grandstream Networks
Model	GDS3705
Category	Intercom System
Language	English