opensips
OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server.
opensips Alternatives
The best opensips alternatives based on verified products, community votes, reviews and other factors.
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FusionPBX is an open source FreeSWITCH GUI.
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An open source telephony switching and private branch exchange service for Linux.
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AirDroid Business, an enterprise-grade MDM solution, is designed to enable businesses mobility and productivity through remote access and control, device provisioning, policy application and management, kiosk mode, and geofencing.
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FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
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FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
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Kamailio® (successor of former OpenSER and SER) is an open source SIP server released under...
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VitalPBX is a full-feature PBX (phone system) based on Linux and Asterisk.
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Your Open Source Solution For Unified Comunnications And More…
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3CXPhone is a free VoIP phone available for Windows, iPhone or any Android based smart phone such...
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Elastix is an open source Unified Communications Server software that brings together IP PBX...
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The most advanced interface for managing Asterisk PBX with Multitenant and Realtime capabilities
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AsteriskNOW is the fastest way to get started building custom telephony solutions with Asterisk.
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SIP proxy server implementation compliant to RFC3261, written in C++11 started in 2011.
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sipXcom open source unified communications software is the standard for enterprise voice solutions. Voice, chat, IVR, presence and more in one application.