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Voice
z SIPv2 (RFC3261) compliance
z SIP METHOD: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS,PING, PRACK, REFER, REGISTER,
SUBSCRIBE, UPDATE
z SIP Extension: Session Timer, Proxy-Require, P-Asserted (RFC3325), MWI (RFC3842)
z Voice Compression: G.711 a/u-law, G.726, G.729A/AB,G.723.1
z CNG and VAD
z Silence suppression & detection
z G.168 Echo Cancellation
z Adaptive jitter buffer
z Programmable gain control
z In-band DTMF
z Out-of-band DTMF relay: RFC2833
z DTMF
z Termination Impedance: 600/900 ohm complex Impedance
z Failover SIP Proxy server registrations
z Failsafe 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 2
nd
stage.
Polarity reversal generation (FXS) – marked with red would be on 2
nd
stage.
Pound Key support
Hunting number support
Telephone book
E.164 numbering
Hot line
Call features:
z Call Hold, Call Waiting, Call Pickup
z Call Forward - Unconditional, Busy, No Answer
z Call Transfer - Unattended, Attended
z Speed Dialing, Repeat Call On Busy, Three Way Conference Call