Texr C SIP

TCSip is a library and daemon implementing VoIP softphone.

Features supported:

voice calls
encryption of voice trafic powered by SRTP
encryption of signaling trafic powered by SSL
X509 client certificates for both SIP and HTTPS
history and contacts store available offline
command line client
operation as daemon controlled by IPC (local socket msgbuf)
WebRTC-compatible sessions
using ICE to pass voice trafic through NAT

Operation systems

Tcsip proven to work on such platforms:

iOS
Mac OS X
Android
Linux

Codecs

Supported codecs

PCMU/PCMA
Opus
speex