= PJSIP Datasheet =

== SIP capabilities ==

 * Base:
   * INVITE, CANCEL, BYE, REGISTER, OPTIONS, INFO
   * SDP
 * Transport:
  * UDP, TCP, TLS
  * DNS SRV resolution (RFC 3263)
  * IPv6 (UDP only)
 * Call:
  * hold, unhold
  * transfer/REFER (attended and unattended) (RFC 3515, 3891, 3892)
  * norefersub (RFC 4480)
  * UPDATE (RFC 3311)
  * 100rel/PRACK (RFC 3262)
  * tel: URI (RFC 3966)
  * Session Timer (RFC 4028)
 * SDP:
  * RTCP attribute (RFC 3605)
 * Presence and IM:
  * SUBSCRIBE, NOTIFY
  * PUBLISH (RFC 3903)
  * MESSAGE (RFC 3428)
  * typing indication (RFC 3994)
  * pidf+xml (RFC 3856, 3863)
  * xpidf+xml
  * RPID (subset) (RFC 4480)
 * Other extensions:
  * rport (RFC 3581)
  * AKA, AKA-v2 authentication (RFC 3319, 4169)
  * Service-Route header (RFC 3608)

== Media capabilities (audio only) ==

Base:
RTP, RTCP
event (RFC 2833)
client conferencing, tone generation, file playback/record, etc.
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
RTCP XR (RFC 3611)
Transports:
UDP, STUN, ICE
IPv6 (UDP only)
SRTP (RFC 3711) and SRTP SDES (RFC 4568)

== STUN, TURN, ICE ==

STUN:
latest RFC (RFC 5389)
DNS SRV resolution
short/long term authentication
fingerprint
TURN:
latest draft (RFC-to-be 5766)
DNS SRV resolution
UDP and TCP client connection
ICE:
latest draft (RFC-to-be 5245)
host, srflx, and relayed candidates
aggressive nomination