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- pjsua is an open source command line SIP user agent that is used as
- the reference implementation for PJSIP and PJMEDIA. It has many
- features, such as:
- * Mutiple identities/account registrations
- * Concurrent calls and conference (unlimited number, but only up
- to 254 sources can be mixed to a single destination)
- * Call features: call hold, call transfer (attended or unattended,
- with or without refersub).
- * SIP Presence/SIMPLE with PIDF and XPIDF support. PUBLISH support.
- * Instant messaging and message composing indication
- * DTMF digits transmission/receipt (RFC 2833)
- * WAV file playing, streaming, and recording.
- * Accoustic echo cancellation (AEC).
- * Auto-answer, auto-play file, auto-loop RTP
- * Support SIP UDP, TCP, and TLS transports. Support for DNS SRV
- resolution.
- * NAT traversal with rport and STUN.
- * Tone generation.
- * Codecs: PCMA, PCMU, GSM, Speex (including wideband/16KHz and
- ultra-wideband/32KHz), L16 (8-48KHz, mono or stereo), and iLBC.
- * Adaptive jitter buffer, adaptive silence detection, and packet
- lost concealment audio features.
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