Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

智能电话外呼系统 呼叫中心系统 freeswitch webrtc

A PJSIP module for React Native.

The Open Source Cloud Communications Platform

Android Mobile SDK to easily integrate communication features (WebRTC, messaging, presence, voice, video, screensharing) based on RestComm into native Mobile Applications

gb28181-proxy 基于sip实现GB28181的通信框架，区分client和server。以便于快速构建发起SIP请求和处理响应。支持NAT穿透，支持海康、大华、宇视等品牌的IPC、NVR、DVR接入及联平台。项目不仅限于gb28181协议。也可以利用封装的SIP方法处理其他协议。

Simlar for android

RODA - Repository of Authentic Digital Objects

Project of Multi-protocol Test Tool opensourced by Ericsson

SIP module for React Native

mjSIP - a complete Java-based SIP stack implementation

监控设备管理平台，支持GB28181国标设备接入、支持海康、大华等品牌监控设备接入

SipApp is a simple application to demonstrate how to create voice call android application based on sip server

SIP-Client for a VoIP Door-Intercomstation

PJSIP for Android. Library available on JCenter.

SIP servlets for Voice over IP and cloud telephony application and B2BUA / proxy SIP servers

PJSIP PJSUA2 api library for Android

A simple sip talk demo based on pjsip!

语音呼叫系统-外呼系统,2025年真正可商用CALLWG语音呼叫系统,语音呼叫系统功能:机器人话术外呼系统|呼叫中心|VIP队列|来电记忆|ASR语音识别|TTS等,语音呼叫系统网关支持中国电信/中国联通/中国移动运营商线路接入,支持SIP|Jssip|webrtc|webSocket|http等协议对接。

Rebranded version of CSipSimple (pull-requests are welcome here)