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z RFC1889 RTP: A Transport Protocol for Real-Time Applications
z ARP Address Resolution Protocol
z RFC2327 Session Description Protocol
z RFC2543 SIP: Session Initiation Protocol
z RFC2833 RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals
z RFC2880 Internet Fax T.30 Feature Mapping
z RFC2976 The SIP INFO Method
z RFC3261 SIP: Session Initiation Protocol
z RFC3262 Reliability of Provisional Responses in Session Initiation Protocol (SIP)
z RFC3263 Session Initiation Protocol (SIP): Locating SIP Servers
z RFC3264 An Offer/Answer Model with Session Description Protocol (SDP)
z RFC3265 Session Initiation Protocol (SIP)-Specific Event Notification
z RFC3311 The Session Initiation Protocol (SIP) UPDATE Method
z RFC3325 Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted
Networks
z RFC3362 Real-time Facsimile (T.38) – image/t38 MIME Sub-type Registration
z RFC3389 Real-time Transport Protocol (RTP) Payload for Comfort Noise (CN)
z EFC3489 STUN - Simple Traversal of User Datagram Protocol (UDP)
Through Network Address Translators (NATs)
z RFC3428 Session Initiation Protocol (SIP) Extension for Instant Messaging
z RFC3515 The Session Initiation Protocol (SIP) Refer Method
z RFC3550 RTP: A Transport Protocol for Real-Time Applications
z RFC3581 An Extension to the Session Initiation Protocol (SIP) for Symmetric Response Routing
z RFC3665 Session Initiation Protocol (SIP) Basic Call Flow Examples
z RFC3824 Using E.164 numbers with the Session Initiation Protocol (SIP)
z RFC3841 Caller Preferences for the Session Initiation Protocol (SIP)
z RFC3842 A Message Summary and Message Waiting Indication Event Package for the
Session Initiation Protocol (SIP)
z RFC3891 The Session Initiation Protocol (SIP) "Replaces" Header
z RFC3892 The Session Initiation Protocol (SIP) Referred-By Mechanism
z RFC3960 Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP)
z RFC4028 Session Timers in the Session Initiation Protocol (SIP)
Voice
z SIPv2 (RFC3261) compliance
z SIP Proxy Redundancy: Dynamic via DNS SRV, A Records Re-registration with Primary SIP Proxy Server.
z Secure(Encrypted) Calling via Pre-Standard Implementation of Secure RTP.
z SIP Extension: Session Timer , Proxy-Require,
z MD5 Authentication for SIP
z SIP NAT Keep Alive Time
z Flash Hook Timer
z MWI- Message Waiting Indicator Tones
z VMWI- Via FSK
z Streaming Audio Server- UP to 10 Sessions
z Voice Compression: G.711 a/u-law , G.726, G.729A/B, G.723.1
z CNG and VAD
z Silence suppression & detection
z G.165/G.168 Echo Cancellation
z Adaptive jitter buffer
z Programmable gain control
z In-band DTMF
z Out-of-band DTMF relay: RFC2833/ SIP info
z DTMF, Pulse dial support
z Termination Impedance: 600/900& complex Impedance
z Failover SIP Proxy server registrations
z T.30 FAX pass through, T.38 real time FAX relay
z Caller ID: DTMF, FSK-Bellcore, FSK-ETSI detection and generation
z Telephone book
z Hot Line and Warm Line Calling