Speaker Nodes

The nodes signal using SIP. Any device capable of being an SIP endpoint can be a node. i.e a common IP phone. But for the purpose, it needs to be autoanswering.

We built a prototype node using RaspberryPi, it was cheaper than other alternatives.

Configuring RaspberyPi as an IP speaker.

  1. Install raspbian from here
  2. Follow USB device check list to remove glitches from the onboard audio.
  3. Install linphone and use the linphone headless deamon linphonecsh to recieve calls.
  4. Use the following script to configure linphone.