PJSIP Datasheet

Operating Systems Supported

• Mac OS X
• Windows (32 and 64bit), including Windows 10
• Linux/uClinux
• Smartphones:
  • iOS
  • Android
  • Windows Mobile/Windows CE
  • Windows Phone 10/Universal Windows Platform (UWP)
• Community supported:
  • OpenBSD
  • FreeBSD
  • Solaris
  • MinGW
  • RTEMS
  • Embox

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
  • QoS (DSCP, WMM)
• Routing/NAT:
  • rport (​RFC 3581)
  • Service-Route header (​RFC 3608)
  • SIP outbound for TCP/TLS (​RFC 5626)
  • Path header (with SIP outbound) (​RFC 3327)
• 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)
  • Reason header (​RFC 3326, partially supported)
  • P-Header (​RFC 3325, partially supported)
• SDP:
  • ​RFC 2327 (obsoleted by ​RFC 4566)
  • RTCP attribute (​RFC 3605)
  • IPv6 support (​RFC 3266)
• Multipart (​RFC 2046, ​RFC 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, ​RFC 3863)
  • xpidf+xml
  • RPID (subset) (​RFC 4480)
• Other extensions:
  • INFO (​RFC 2976)
  • AKA, AKA-v2 authentication (​RFC 3310, ​RFC 4169)
  • ICE option tag (​RFC 5768)
  • SIP usage for trickle ICE (​RFC 8840)
  • Message summary/message waiting indication (MWI, ​RFC 3842)
• Compliance, best current practices:
  • Issues with Non-INVITE transaction (​RFC 4320)
  • Issues with INVITE transaction (​RFC 4321)
  • Multiple dialog usages (​RFC 5057)
  • SIP torture messages (​RFC 4475, tested when applicable)
  • SIP torture for IPv6 (​RFC 5118)
  • Message Body Handling (​RFC 5621. Partial compliance: multipart is supported, but Content-Disposition header is not handled)
  • The use of SIPS (​RFC 5630. Partial compliance: SIPS is supported, but still make use of transport=tls parameter)

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
  • TCP allocations (​RFC 6062)
• ICE:
  • ​RFC 5245
  • host, srflx, and relayed candidates
  • aggressive and regular nomination
  • ICE option tag (​RFC 5768)
  • Trickle ICE (​RFC 8838)
• NAT type detection:
  • legacy ​RFC 3489
• Other:
  • QoS support on sockets (DSCP, WMM)

Media/audio capabilities

• Core:
  • any clockrates
  • N-channels support
  • zero thread
• Base:
  • DTMF (​RFC 4733/​RFC 2833)
  • echo cancellation (WebRTC, Speex, suppressor, or native)
    • Third party acoustic echo cancellation (AEC)
      • ​Echo cancellation software from voice INTER connect
      • ​CANEC from DSP Algorithms
      • ​VQE from Wave Arts
      • ​bdIMAD from bdSound
      • ​TrueVoice from Limes Audio
      • ​Echo cancellation software from SoliCall
  • inband DTMF/tone generation
  • WAV file playback and recording
  • WAV file playlist
  • memory based playback and capture
  • adaptive jitter buffer
  • packet lost concealment
  • clock drift recovery
• Audio conferencing (in client)
• Flexible media flow management
• Audio Codecs:
  • Bundled:
    • Speex 8KHz, 16Khz, 32KHz
    • iLBC, GSM,
    • L16, G.711A/U (PCMA/PCMU),
    • G.722,
    • G.722.1 16KHz/32KHz (Siren7/Siren14, ​licensed from Polycom)
  • with third party libraries (may need additional licensing, please check each codec provider):
    • ​Opus codec (see ticket #1904)
    • Intel IPP:
      • AMR-NB, AMR-WB,
      • G.722, G.722.1,
      • G.723.1, G.726, G.728, G.729A,
    • ​SILK codec (see ticket #1586)
    • ​OpenCore AMR:
      • AMR-NB (see ticket #1388)
      • AMR-WB (see ticket #1608)
    • ​bcg729: G.729 (see ticket #2029)
  • Hardware codecs:
    • on iPhone: iLBC
  • Platform specific/native codecs:
    • on Android (Mediacodec): AMR-NB, AMR-WB

• Transports:
  • RTP and RTCP with media statistic (​RFC 3550, ​RFC 3551)
  • RTCP XR (subset, ​RFC 3611)
  • UDP, STUN, ICE
  • IPv6 (UDP only)
  • SRTP (​RFC 3711), SRTP SDES (​RFC 4568), and DTLS-SRTP (​RFC 5763)
  • QoS (DSCP, WMM)
  • Symmetric RTP/RTCP (​RFC 4961)
  • Multiplexing RTP and RTCP (rtcp-mux) (​RFC 5671) (see ticket #2087)
  • Third Party
    • ZRTP
      • ​Zorg
      • ​ZRTP4PJ
• Audio devices:
  • native WMME (Windows, Windows Mobile)
  • native ALSA (Linux)
  • native CoreAudio (Mac OS X, iPhone) with support for native/hardware EC
  • native Android (via JNI)
  • OpenSL (Android)
  • PortAudio (WMME, DirectSound, OSS, ALSA, CoreAudio, etc.)

Video Media

• Platforms:
  • Windows,
  • Linux,
  • Mac
  • iOS
  • Android
• Codecs:
  • H.263-1998 (ffmpeg)
  • H.264 (​OpenH264, VideoToolbox (iOS and Mac), ffmpeg+x264, Mediacodec (Android))
  • VP8 (libvpx, Mediacodec (Android))
  • VP9 (libvpx, Mediacodec (Android))
• Capture devices:
  • colorbar (all platforms)
  • DirectShow (Windows)
  • Video4Linux2 (Linux)
  • QuickTime (Mac OS X)
  • AVFoundation (iOS)
• Rendering devices:
  • SDL (Windows, Linux, and Mac OS X)
  • OpenGL ES or UIView (iOS)
• Video conferencing (in client)
• Flexible media flow management