Open Source C# SIP Servers

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C# SIP Servers

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Browse free open source C# SIP Servers and projects below. Use the toggles on the left to filter open source C# SIP Servers by OS, license, language, programming language, and project status.

  • $300 Free Credits to Build on Google Cloud Icon
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  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

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  • 1
    SipLine

    SipLine

    Free, native Windows SIP softphone with HD audio, SRTP encryption

    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
    Downloads: 14 This Week
    Last Update:
    See Project
  • 2
    Simple test set for SIP server.
    Downloads: 0 This Week
    Last Update:
    See Project
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