Voice
zSIPv2 (RFC3261) compliance
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
Call features:
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