Update: Since this post we started using USB Audio dongles for better quality over the internal audio ports, removing the need to use the loopback driver
/sbin/modprobe snd-aloop Thanks Ed for the reminder!
So I absolutely hate adapting ATA’s or whatever to use with old intercom systems, and Valcom’s solution is way over priced for what most people need.
This costs about $100 in equipment, and you should know how to install raspian (or google how).
Once you have a good install of raspian and have ran rpi-update, here’s the setup.
Update repo’s and install linphone
sudo apt-get update sudo apt-get install linphone-nogtk
Then create the script in /usr/local/sbin/picom.sh
#!/bin/bash linphonecsh init sleep 6 linphonecsh register --host <ip address> --username <Ext> --password <password> linphonecsh status register linphonecsh generic 'autoanswer enable' linphonecsh soundcard ring 0 linphonecsh soundcard playback 0 linphonecsh soundcard capture 2 linphonecsh generic 'codec enable 8'
If you want to use the night ringer, simply remove
linphonecsh generic 'autoanswer enable'
make the file an executable.
chmod +x /usr/local/sbin/picom.sh
And either create a cron job OR init script (crontab -e or /etc/rc.local)
/sbin/modprobe snd-aloop /usr/local/sbin/picom.sh chmod 666 /dev/null
if you need to adjust the volume, run this command.
amixer set PCM -- 100%