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As far as I understand it is possible to implement an Intercom with
Aastras 390 / 480 ADSI compatible phones. <br>
One of the ADSI commands sent to the phone like caller-Id, takes the
390/480 off hook. <br>
This way it would be possible to implement a * server controlled auto
answer function.<br>
I do not have any documentation about the exact command sequence
though. <br>
<br>
Alfred R. Nurnberger<br>
<br>
Eric Wieling wrote:<br>
<blockquote cite="mid1095547284.11910.370.camel@vulcan.fnords.org"
type="cite">
<pre wrap="">On Sat, 2004-09-18 at 16:32, James H. Thompson wrote:
</pre>
<blockquote type="cite">
<pre wrap="">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:
<a class="moz-txt-link-freetext" href="http://www.voip-info.org/wiki-Asterisk+Paging+and+Intercom">http://www.voip-info.org/wiki-Asterisk+Paging+and+Intercom</a>
<a class="moz-txt-link-freetext" href="http://www.voip-info.org/wiki-Asterisk+phone+door">http://www.voip-info.org/wiki-Asterisk+phone+door</a>
</pre>
</blockquote>
<pre wrap=""><!---->
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.
</pre>
</blockquote>
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