[Asterisk-Users] IP Intercom's

[Alfred Nurnberger]

As far as I understand it is possible to implement an Intercom with 
Aastras 390 / 480 ADSI compatible phones.
One of the ADSI commands sent to the phone like caller-Id, takes the 
390/480 off hook.
This way it would be possible to implement a * server controlled auto 
answer function.
I do not have any documentation about the exact command sequence though.

Alfred R. Nurnberger

Eric Wieling wrote:

>On Sat, 2004-09-18 at 16:32, James H. Thompson wrote:
>  
>
>>There are several ways to approach this:
>>* modify an existing SIP phone with Auto-answer (Grandstream for example) to interface with a loud
>>speaker
>>* use a SIP client (Asterisk for example) on a small PC and interface the sound card to a
>>loudspeaker
>>* use a traditional overhead paging/intercom hardware and interface to it via the sound card  or via
>>an FXS port.
>>* use an analog auto answer door phone with an FXS interface
>>
>>Check these wiki pages for starting points:
>>    http://www.voip-info.org/wiki-Asterisk+Paging+and+Intercom
>>    http://www.voip-info.org/wiki-Asterisk+phone+door
>>
>>    
>>
>
>Or you could plug an amp and some overhead speakers into the sound card
>on the box running Asterisk and use chan_oss or chan_alsa with
>auto-answer enabled.
>
>  
>

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