[asterisk-users] RS485 Audio device

Sebastian Nielsen sebastian at sebbe.eu
Wed Nov 2 09:41:23 CDT 2016

Why RS485? Whats wrong with a simple 3-wire connection (monospeaker, monomic, ground) where you short monomic to ground on button press?

Then you could use a simple usb device + device server to convert fron "smartphone headset" to usb then to network.

On the server, you use a SIP phone client, who use this device as mic/speaker, which is configured to lift the hook on headset button press.
In asterisk dialplan, you have logic which automatically dials where the doorphone should call upon hooklift.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20161102/4a4145e7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 6298 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20161102/4a4145e7/attachment.bin>

More information about the asterisk-users mailing list