PJSIP Datasheet

Operating Systems Supported

• Windows
• Mac OS X
• Linux/uClinux
• Smartphones:
  • Windows Mobile/Windows CE
  • Symbian
  • iPhone OS/iOS (iPhone, iPad, iPod Touch)
• Community supported:
  • OpenBSD
  • FreeBSD
  • Solaris
  • MinGW
  • RTEMS
  • Android

SIP Capabilities

• Base specs:
  • Core methods: RFC 3261: INVITE, CANCEL, BYE, REGISTER, OPTIONS, INFO
  • Digest authentication (RFC 2617)
• Transports:
  • UDP, TCP, TLS (server or mutual)
  • DNS SRV resolution (RFC 3263)
  • IPv6 (UDP only)
  • QoS (DSCP, WMM)
• Call:
  • Offer/answer (RFC 3264)
  • hold, unhold
  • redirection
  • transfer/REFER (attended and unattended):
    • Base (RFC 3515)
    • replaces (RFC 3891)
    • Referred-by (RFC 3892)
  • sipfrag support (RFC 3420)
  • norefersub (RFC 4488)
  • UPDATE (RFC 3311)
  • 100rel/PRACK (RFC 3262)
  • tel: URI (RFC 3966)
  • Session Timers (RFC 4028)
• SDP:
  • RFC 2337 (obsoleted by RFC 4566)
  • RTCP attribute (RFC 3605)
  • IPv6 support (RFC 3266)
• Multipart (RFC 2046, 5621)
• Presence and IM:
  • Event framework (SUBSCRIBE, NOTIFY) (RFC 3265)
  • Event publication (PUBLISH) (RFC 3903)
  • MESSAGE (RFC 3428)
  • typing indication (RFC 3994)
  • pidf+xml (RFC 3856, 3863)
  • xpidf+xml
  • RPID (subset) (RFC 4480)
• Other extensions:
  • INFO (RFC 2976)
  • rport (RFC 3581)
  • AKA, AKA-v2 authentication (RFC 3310, 4169)
  • Service-Route header (RFC 3608)
  • ICE option tag (RFC 5768)
• Compliance:
  • Issues with Non-INVITE transaction (RFC 4320)
  • Issues with INVITE transaction (RFC 4321)
  • Multiple dialog usages (RFC 5057)

Media/audio capabilities

• Core:
  • any clockrates
  • N-channels support
  • zero thread
• Base:
  • event (RFC 2833)
  • echo cancellation (Speex, CANEC, suppressor, or native)
  • client conferencing
  • tone generation
  • file playback and recording
  • file playlist
  • adaptive jitter buffer
  • packet lost concealment
  • clock drift recovery
• Codecs:
  • AMR-NB, AMR-WB, L16, G.711A/U, G.722,
  • G.722.1 16KHz/32KHz (Siren7/Siren14),
  • G.723.1, G.726, G.728, G.729A,
  • iLBC, GSM,
  • Speex 8KHz, 16Khz, 32KHz
  • Hardware codecs:
    • with APS-Direct/VAS-Direct: AMR, G.729, iLBC, PCMA, PCMU
    • with iPhone: iLBC
• Transports:
  • RTP and RTCP with media statistic (RFC 3550, 3551)
  • RTCP XR (subset, RFC 3611)
  • UDP, STUN, ICE
  • IPv6 (UDP only)
  • SRTP (RFC 3711) and SRTP SDES (RFC 4568)
  • QoS (DSCP, WMM)
• Audio devices:
  • native WMME (Windows, Windows Mobile)
  • native ALSA (Linux)
  • native Symbian MMF (Symbian/Nokia S60)
  • native APS (Nokia S60) with hardware EC, and APS-Direct to support hardware codecs
  • native VAS (Nokia S60) with hardware EC, and VAS-Direct to support hardware codecs
  • native CoreAudio (Mac OS X, iPhone) with support for native/hardware EC
  • PortAudio (WMME, DirectSound, OSS, ALSA, CoreAudio)

NAT Traversal

• STUN:
  • RFC 5389
  • Some RFC 3489 compatibility
  • DNS SRV resolution
  • short/long term authentication
  • fingerprinting
• TURN:
  • RFC 5766
  • DNS SRV resolution
  • UDP and TCP client connection
• ICE:
  • RFC 5245
  • host, srflx, and relayed candidates
  • aggressive and regular nomination
  • ICE option tag (RFC 5768)
• NAT type detection:
  • legacy RFC 3489
• Other:
  • QoS (DSCP, WMM)