TekPhone is a SIP (Session Initiation Protocol) VoIP Softphone that provides User Agent (SIP-UA) functions (Based on RFC 3261) runs under Windows (Vista, Windows 7/8/10, 2008-2019 Server). Simple, easy to use interface. Supports (Only) G.711 A - Mu law codecs, RFC 2833/SIP INFO/Inband methods for DTMF digit delivery. Supports UPnP for NAT traversal. You can also set external IP address manually. TekPhone can record incoming audio if away mode selected. You can specify your own welcome message. ENUM (RFC 37612) support.
