Voice, Call features, Z SIPv2 RFC3261 compliance

Voice

zSIP METHOD: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS,PING, PRACK, REFER, REGISTER, SUBSCRIBE, UPDATE

zSIP Extension: Session Timer, Proxy-Require, P-Asserted (RFC3325), MWI (RFC3842)

zVoice Compression: G.711 a/u-law, G.726, G.729A/AB,G.723.1

zCNG and VAD

zSilence suppression & detection

zG.168 Echo Cancellation

zAdaptive jitter buffer

zProgrammable gain control

zIn-band DTMF

zOut-of-band DTMF relay: RFC2833

zDTMF

zTermination Impedance: 600/900 ohm complex Impedance

zFailover SIP Proxy server registrations

zFailsafe mechanism (FXS relay to PSTN):

Network failure Service unavailable Power loss

T.30 FAX pass through, T.38 real time FAX relay

Caller ID: DTMF, FSK-Bell core, FSK-ETSI detection and generation, Japan CLIP/JCLIP, BT marked with red would be on 2nd stage.

Polarity reversal generation (FXS) – marked with red would be on 2nd stage. Pound Key support

Hunting number support Telephone book

E.164 numbering Hot line

zCall Hold, Call Waiting, Call Pickup

zCall Forward - Unconditional, Busy, No Answer

zCall Transfer - Unattended, Attended

zSpeed Dialing, Repeat Call On Busy, Three Way Conference Call