B-Force Communicator

**B-FORCE Communicator**

Developer(s)	T&T International Company
Initial release	2010
Stable release	1.1.1.165 / 19 february 2016
Written in	C, C++, QT
Operating system	Microsoft Windows, Android
Type	Voice over IP, instant messaging, Voice calls and video calls
License	Shareware
Website	http://www.b-force.ru/

IP softphone supporting voice, video and files transfer in the Internet and text messages exchange. Due to the implemented cryptographic algorithm the IP softphone is the only product that may be used in the state structures of the Russian Federation.

Description

IP softphone based on SIP open protocol includes all functions of standard IP phones – use of the contact list, simultaneous use of several active phone lines, support of video calls, exchange of text messages, transfer of files, display of remote subscribers attendance status etc. RTP and RTCP protocols are used to transfer media data. Files are transferred via MSRP protocol.

B-Force Communicator has extensive possibilities to ensure safe encrypted connection for subscribers. To do that, standard protocols TLS and ZRTP are used. TLS is used for encryption of SIP Telephony signaling, and ZRTP for transfer of audio/video media data. Stronger encryption algorithms for audio data are supported (AES, Twofish etc.).

Basic features

Voice calls and video calls
Hold call, playing the audio content while on hold (MOH)
Support of several active connections
Redirect call, transfer call
Text messages
List of contacts and group of contacts, display of information on the presence in the network (Presence)
Storage of call history, transferred/received files and all correspondence
Simultaneous use of several accounts
Reminding of missed incoming calls and received files
Centralized storage of configuration, messages and history of calls on the server (online provisioning)
Determination of NAT parameters using STUN

Codecs

Encryption

Support of TLS (version 1.2) for signaling encryption
Support of SRTP for media data encryption
Exchange of keys via ZRTP and SDES protocol
RTCP encryption
SIPS support

Used encryption algorithms

Encryption of media data

Authentications of media data

HMAC-SHA-1 32 bit
HMAC-SHA-1 80 bit
ГОСТ 28147-89 message authentication code

ZRTP keying

Diffie-Hellman 2048 bit
Diffie-Hellman 3072 bit
ECDH 256 bit
ECDH 384 bit

Method of protection against MITM

Short 4-character string (SAS)

Compatible products

B-Force Communicator may be used together with B-Force PBX.