Backchat all channel True P2P voice- and video phone calls without the need for accounts or access to the Internet. There is no discovery mechanism, no meshing and no servers. Just scan each others QR-Code that will contain the contacts IP address. This works in many local networks such as community mesh networks, company networks or at home.

Features:

voice and video calls
accounts or registration activated via backone network
encrypted communication
database backup and encryption
add custom addresses to reach contacts

Limitations:

no calls after MAC / IP address change

Documentation

Connects to IP addresses in a true P2P fashion. Contacts are shared via QR-Code. They contain a name, a public key and a list of MAC/IPv4/IPv6 addresses or domain names. By default, only a single MAC address is transferred and used to create an IPv6 link local address (among others) to establish a connection. This does not even need a DHCP server. The exchanged public key is used to authenticate/encrypt signaling data to establish a WebRTC session that can transmit voice and video.