[Asterisk-Users] External relay triggered by Asterisk extension -question

[Jay Milk]

Done something similar in a different application, but * should handle
it --

In my case, I took a crystalfontz LCD, type 633, and used two of the
four fan-outputs to drive two 12V relays.  As a nice extra, you get
temperature capabilities thrown in, so you can monitor your set-up.  The
LCD runs on serial, of course.

As an alternative, you can use any of the many available relay boards --
$50 gets you this:
http://www.phanderson.com/iom141.html

> -----Original Message-----
> From: James Bean [mailto:james at hdcs.com.au] 
> Sent: Saturday, February 19, 2005 11:34 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] External relay triggered by 
> Asterisk extension -question
> 
> 
> 
> Has anyone every setup an external open/close relay, off say 
> a serial interface, and have an extension trigger the relay?
> 
> Why I ask is I have a student accomodation where I am 
> installing an asterisk box to supply phone services to the 
> tenants, there is already an intercom system in the main 
> hallways that triggers the downstairs door and gate using a 
> standard relay open/close trip, so I was hoping to get the 
> linux box with asterisk to trip the same type of relay.
> 
> Is there any door phones that are speaker driven only and sip 
> based that anyone knows about as well?
> 
> James
> 
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