An async thread-safe singleton for the Telnyx OpenApiClient

A .NET thread-safe singleton HttpClient for Telnyx

A Telnyx .NET client generated from the Telnyx OpenAPI schema, updated daily

Experimental C# sip telephony server

Session Initiation Protocol (SIP) client

A Paper's-Please style telephony simulation created at the Southampton Game Jam

Shift is a simple command line application that will take a preformatted CSV file and create a functioning import file for a Polycom Sidecar on the Metaswitch VVX Endpoint Pack.

Asterisk CTI Application for Windows build on .NET 5

Demonstration project for using libphonenumber-csharp to validate phone numbers in an ASP.NET Core 2.1 MVC application.

A toolkit for writing Interactive Voice Response Applications. It requires an ivrToolkit.Plugin of your choice. I recommend ivrToolkit.Plugin.SipSorcery. There are also plugins for Dialogic SIP and Analog but those require a Dialogic driver.

Ratcow.Csta is an implementation of the CSTA protocol (ECMA-323 (XML Protocol for Computer Supported Telecommunications Applications)/ECMA-354 (Application Session Services)) and some Avaya extensions needed to support the Avaya DMCC protocol.

FRITZ!Box TR064 implementation

Simple and lightweight client for FritzBox's integrated CallMonitor. Executes a specified program with any available parameter on call-events.

Managed library for TAPI development with .NET

FreeSwitch library for DotNet

IP Phone – lightweight SIP softphone for Windows

Twilio C#/.NET Helper Library for .NET6+.