Open Source C# VoIP Software

SipLine is a modern, lightweight SIP softphone for Windows 10/11 built with .NET 9 WPF. It provides enterprise-grade VoIP communication with a focus on performance, security, and extensibility. Features Ultra-Fast: Startup in <0.5s, minimal CPU usage HD Audio: Opus and G.711 codecs with adaptive jitter buffer Security: TLS transport, SDES-SRTP encryption, Windows DPAPI credential protection Multi-Account: Up to 5 simultaneous SIP accounts Plugin SDK: C# SDK for custom integrations (CRM, call recording, automation) Plugin Marketplace: Community and premium extensions Headset Support: Jabra, Poly, Sennheiser, Logitech with HID controls Call Quality: Real-time MOS Score, Jitter, Packet Loss and RTT monitoring Enterprise: Silent MSI installer, GPO support, JSON centralized config Compatibility: 3CX, Asterisk, FreePBX, OVH, Twilio, RingCentral, and more Language packages : https://sipline.feelautom.fr/languages

OfficeSIP Softphone and Messenger are two enterprise VoIP SIP clients written in C# in .NET Framework. The SIP clients make use of Microsoft UCC API SDK, ensuring the highest quality of audio and video. Compatible with Office Communications Server. See also open source, cross-platform: 1) simple messenger Brief Msg at http://briefmsg.org 2) MUVConf is a multi-user video conferencing, see demo video http://youtu.be/YrBU-Aqtvrk, download https://code.google.com/p/muvconf/downloads/list

The Asterisk .NET library consists of a set of C# classes that allow you to easily build applications that interact with an Asterisk PBX Server (1.0/1.2/1.4 version). Both FastAGI and Manager API supported. .NET/Mono compatible.

http://www.astchannelslive.com/sourceforge.php This is a dashboard work with Asterisk(FreePBX) any other installation: 1. Showing the peer status 2. queue,agent at real time 3. Hangup, Spy,....

Free version of AVREMO.CMS.API exposing REST Services. With this software you can browse for all CMS reports. Design a report with AVAYA CMS Supervisor designer, application automatically expose data as XML or JSON. You can also browse reports with your preferred browser (desktop or mobile) and execute CMS operations like modify dictionaries, modify agent skills, modify VDN/Vector associations and more. Application package include : - A responsive WEB server interface (compatible with mobile browsers) to browse reports, perform CMS Operations and Agent Skill modification from any device having a browser. - Full Documentation - The server application, including administration GUI - Dashboard : a .NET consumer, used to test server and get REST URLs - CMS Operations (modify Dictionaries, Call Center Administration, etc) - Agent skill modification. - Basic security.

Free .NET 4.5 consumer of AVREMO.CMS.API.LimitedEdition AVREMO.CMS.API is able to Show AVAYA CMS reports as HTML, JSON and XML Render. It includes also a wrapper : .NET Client API (AVREMO.CMS.Contracts.dll) enabling fast development in .NET 4.5 consumer applications. AVREMO.CMS.API.FullEdition download page: https://sourceforge.net/projects/avayacmsapiserver/

EchoSharp is a graphical based EchoLink client for the echolink amateur radio/internet protocol.

A convenient alternative to single-purpose touch screens using IP phone application APIs. This plug-in provides alerting, information display and home interaction capabilities, and is customized and controlled from within the HomeSeer web interface.

Turn.Server is .NET TURN (Traversal Using Relay NAT) server written in C#. Compatible with [MS-TURN] extension and clients based on Microsoft UCCAPI SDK.

OutlookDialer is an Outlook 2007 plugin that provides one-click telephone dialing from Outlook contacts pages via the Telos Asterisk web service.

SIP.NET is SIP stack .NET library written in C#. SIP message parser realized on Deterministic Finite-state Machine (DFA parse all SIP message for one pass). DFA generates automatically from Augmented Backus–Naur Form from RFC3261.

This application use sipp. The GUI base application try to create xml and csv files easily and start scenario which are selected. sipp and mono have to be installed on your PC. If you want to send RTP packets, you should copy pcap files to same folder where running sipp_gui.

SipTunnel is used to tunnel SIP UDP datagrams (and also RTP datagrams) through NAT using TCP protocol. It also can be used for many other purposes.

TALK provides an efficient and scalable architecture to make CTI more easy and web oriented. TALK includes a generic JTAPI connector, a full AJAX client, a Gadget, and a library to allows your web applications to be connected to your PBX.

A web services front-end to the Asterisk Management Interface, written in C# / WCF. Need help to maintain the C# codebase, help to get it working on Mono on Linux, and help to port it to Java / CXF / Axis 2.

Turn.Message is .NET parser / generator of the TURN (Traversal Using Relay NAT) messages written in C#. Compatible with [MS-TURN] extension and clients based on Microsoft UCCAPI SDK.

This project aims to provide Web Service clients wrapper for the Voxbone API (VoxAPI)

This program monitors a given email address for a certain subject with a list of phone numbers, and then calls them - all at once. Requires Skype.