Voice
zSIPv2 (RFC3261) compliance
zSIP METHOD: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS,PING, PRACK, REFER, REGISTER, SUBSCRIBE, UPDATE
zSIP Extension: Session Timer,
zVoice Compression: G.711
zCNG and VAD
zSilence suppression & detection
zG.168 Echo Cancellation
zAdaptive jitter buffer
zProgrammable gain control
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z
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,
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