WebRTC SIP clients

What is the role of SIP server ?

SIP Server convert the SIP transport from WebSocket protocol to UDP, TCP or TLS which are supported by all legacy networks. It also facilitates the use of rich serves such as phonebook synchronisation , file sharing , oauth in client .

How does WebRTC Solution traverse through FireWalls ?

NAT traversal across Firewalls is achieved via TURN/STUN through ICE candidates gathering .Current ice_servers are : stun:stun.l.google.com:19302 and  turn:user@numb.viagenie.ca

What audio and video codecs are supported by WebRTC client side alone ?

Without the role of Media Server WebRTC solution supports Opus , PCMA , PCMU for audio and VP8 for video call.

RTCBreaker if enabled provides a third party B2BUA agent that performs certain level of codec conversion to H.264, H.263, Theora or MP4V-ES for non WebRTC supported agents.

What video resolution is supported by WebRTC solution ?

The browser will try to find the best video size between max and min based on the camera capabilities.

Options are : sqcif | qcif | qvga | cif | hvga | vga | 4cif | svga | 480p | 720p | 16cif | 1080p

We can also predefine the video size such as minWidth, minHeight, maxWidth, maxHeight.

What bandwidth is required to run WebRTC solution ?

We can set maximum audio and video bandwidth to use or use the browser’s ability to set it hy default at runtime . This will change the outgoing SDP to include a “b:AS=” attribute. Browser negotiates the right value using RTCP-REMB and congestion control.

SIPML5 client by dubango

Telestax WebRTC client

SIPJS with flash network support

JSSIP – MIT license 

SIP phones in Ubuntu ( Linux system)

SFL phone

Yate SIP phone

Linphone

Windows Operating system SIP software

Xlite is well known SIP softphone for windows dessktop

Xlite new version

Kapanga SIP softphone . It is also runnable on Linux desktop through windows compatibility softwares like wine

FreeSwitch Communicator , comes along with the Freeswitch Media Server .

Boghe SIP RCS client

Jitsi SIP phone

MAC SIP software

idoubs desktop SIP RCS client for Mac

iOS SIP phone applications

Linphone

     

Android SIP applications

Sipdroid , opensource

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