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3Com VCX IP telephony module: back-to-back user agent SIP PBX; 3CX Phone System, for Windows, Debian 8 GNU/Linux; Aastra 5000, 800, MX-ONE; Alcatel-Lucent 5060 IP Call server; Aricent SIP UA stack, B2BUA, proxy, VoLTE/RCS Client; AskoziaPBX; Avaya Application Server 5300 (AS5300), JITC certified ASSIP VoIP; Bicom Systems IP PBX for telecoms
FreeSWITCH is a free and open-source telephony software for real-time communication protocols using audio, video, text and other forms of media. The software has applications in WebRTC, voice over Internet Protocol (VoIP), video transcoding, Multipoint Control Unit (MCU) functionality and supports Session Initiation Protocol (SIP) features.
Linphone (contraction of Linux phone) is a free voice over IP softphone, SIP client and service. It may be used for audio and video direct calls and calls through any VoIP softswitch or IP-PBX . Linphone also provides the possibility to exchange instant messages.
3CX, Inc., is a software development company and developer of the 3CX Phone System. The 3CX Phone System is a software private branch exchange based on the SIP (Session Initiation Protocol) standard to allow calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services.
The software enables Voice over IP as part of a self-organising Peer-to-peer telephone network. [1] It supports features like call forwarding , call distribution , call hold , presence information and (text) messages, supports encrypted calls and also enables NAT traversal to establish the peer-to-peer connections.
Jami (formerly GNU Ring, SFLphone) is a SIP-compatible distributed peer-to-peer softphone and SIP-based instant messenger for Linux, Microsoft Windows, macOS, iOS, and Android. Jami was developed and maintained by the Canadian company Savoir-faire Linux , [ 5 ] [ 6 ] and with the help of a global community of users and contributors, Jami ...
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Phoner and PhonerLite are softphone applications for Windows operating systems available as freeware.Phoner is a multiprotocol telephony application supporting telephony via CAPI, TAPI and VoIP, while PhonerLite provides a specialized and optimized user interface for VoIP only.