[Asterisk-Users] door phone

[Steve Kann]

On Dec 1, 2003, at 10:10 AM, Jon Pounder wrote:

>
> That's an interesting solution.
>
> Caveats :
>
> - To have a door phone and door release would require 2 ports on the 
> pbx
> unless you don't want to be able to call the doorphone, or release the
> door while the caller is still on the line.

Yes, I am using 2 ports for this.  Otherwise, the door would open if 
you just wanted to ring the phone outside the door.  I have 2 
extensions, (1) front door, and (2) front door release.

I have my PBX set up so that if you dial the release extension, it 
rings once or twice, and then hangs up the call.  This way, people can 
program their phone for the release, and just press a button on their 
phone to open the door.  (for example, if someone just rings the 
doorbell or knocks, instead of calling).

As it happens, the contactor also closes a nice 12V (or something like 
that, circuit), and I added another cheap piezo buzzer, because the 
system I had didn't have any buzzer sounds..).

> - if the doorphone is a regular phone and uses this method, anyone 
> could
> simply apply 120VAC to the phone jack for it and presto, the door 
> opens.

If you used just one extension for both, and the phone jack was 
accessible, and the person had a source of 120V nearby. (or brought 10 
9v batteries with them for 90V).

But, there's probably easier ways to defeat electric door releases than 
all that.


>>
>> For a door release, I have a cheap radio-shack device which is 
>> supposed
>> to light up a lamp when a phone rings.  Basically, it has a contact
>> which is activated by the ring signal on a telephone line.
>>
>> I wired this up to the door release in the office, and have it hooked
>> up to our (non asterisk) PBX.  So, anyone can open the door by dialing
>> the extension.  The ringing itself opens it.
>>
>> The radio shack doojigger was probably about 10 bucks.
>>
>> -SteveK
>>
>>
>> On Nov 26, 2003, at 6:12 PM, Jon Pounder wrote:
>>
>>>> Hi,
>>>>
>>>> Anyone know anything about Asterisk's support for door phones?
>>>> Receiving
>>>> the call from the door intercom system, opening the door, etc?
>>>>
>>>> Any hardware recommendations? I understand that the equipment we 
>>>> have
>>>> now is Panasonic proprietary and came with the currently deployed
>>>> Panasonic TD12-32 pbx.
>>>>
>>>
>>> I just use an ordinary "disposable" phone, and put the zap channel in
>>> immediate mode. lift the phone and it starts to ring the extensions 
>>> in
>>> the
>>> context it jumps to. I can also call the doorphone just like any 
>>> other
>>> extension and it rings when I do so. Basically the keypad is ignored 
>>> on
>>> the phone.
>>>
>>> as for door release, I have an electric strike on my dsc alarm 
>>> system,
>>> but
>>> I have just not gotten around to making an agi that I can use to 
>>> flip a
>>> bit on the parallel port and have that release the strike as well.
>>>
>>> (2n2222, a 10k resistor, and a pcb mount 12v relay, and a flyback
>>> diode,
>>> hooked up to the data bit, and in parallel with the alarm release
>>> relay.)
>>>
>>>
>>>
>>>>
>>>>
>>>> We intend to deploy Asterisk in a 72 extensions + 16 trunks in a
>>>> while,
>>>> so any info will be great.
>>>>
>>>>
>>>>
>>>> thanks
>>>>
>>>>
>>>
>>> _______________________________________________
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>>> Asterisk-Users at lists.digium.com
>>> http://lists.digium.com/mailman/listinfo/asterisk-users
>>>
>>
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