P u r e I P - T e l e p h o n y
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Voice over IP
H.323:
H.323 version 5, H.245 fast connect, Enblock dialing, Overlapped sending
RAS Gatekeeper routed signaling (support for external Gatekeeper)
Security (encrypted password authentication H.235)
Supplementary Services: H.450.1
H.450.2 Call transfer
H.450.3 Call diversion
H.450.4 Call hold
H.450.5 Call Pick-up
H.450.6 Call waiting
H.450.7 Message Waiting Indication
H.450.8 Name identification
H.450.9 Call Completion busy (CCBS) and Call Completion no Reply (CCNR)
DTMF: H.245 “Alphanumeric” oder “Signal Type”
SIP:
SIP version 2 (including HTTP digest authentication) conform RFC 3261
SIP over UDP, TCP, TLS (SIPS, V 7.0 or higher)
SIP services:
MWI (rfc3842/rfc3265 "Subscription für message-summary")
DTMF (rfc2833 "RTP payload for DTMF")
Name Identification (Display String, rfc3325 "Asserted Identity")
Hold/Retrieve (rfc3264 "Offer/Answer Model for SDP")
Transfer (rfc3515 "REFER Method", rfc3891 "Replaces Header)
Coder Change, T.38 (rfc3264 "Re-Negotiation")
Call Forwarding (PBX internal, "183 Call Is Being Forwarded", "Diversion Header")
Overlap Dialing (rfc3578)
Dialoge State monitoring, partner Key (rfc 4235)
Instant Messaging (rfc 3428)
supported SIP-RFCs:
RFC 1889 RTP: Real-Time Transport Protocol
RFC 2327 SDP: Session Description Protocol
RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax
RFC 2543 SIP: Session Initiation Protocol (obsolete)
RFC 2616 Hypertext Transfer protocol (HTTP/1.1)
RFC 2617 HTTP Authentication: Basic and Digest Access Authentication
RFC 2782 A DNS RR for specifying the location of services (DNS SRV)
RFC 2976 The SIP INFO Method
RFC 3261 SIP: Session Initiation Protocol
RFC 3263 Session Initiation Protocol (SIP): Locating SIP Servers
RFC 3264 An Offer/Answer Model with the Session Description Protocol (SDP)
RFC 3265 SIP-Specific Event Notification
RFC 3326 The Reason Header Field for the Session Initiation Protocol
RFC 3389 RTP Payload for Comfort Noise
RFC 3515 The Session Initiation Protocol (SIP) Refer Method
RFC 3550 RTP: Transport Protocol for Real-Time Applications
RFC 3551 RTP Profile for A/V Conferences with Minimal Control
RFC 3555 MIME Type Registration of RTP Payload Formats
RFC 3578 Mapping of ISDN User Part (ISUP) Overlap Signalling to the SIP
RFC 3680 SIP Event Package for Registrations
RFC 3764 enumservice registration for SIP Adresses-of-Record
RFC 3824 Using E.164 numbers with SIP
RFC 3891 The Session Initiation Protocol ‘Replaces Header’
RFC 3892 The SIP Referred-By Mechanism -SIP-aware filtering (to prevent SIP attacks)
RFC 3842 SIP Message Waiting
RFC 3311 re-INVITE
RFC 2833 DTMF via RTP Channel , RTP payload for DTMF
RFC 3325 Name identification
RFC 3578 Overlap Dialing
RFC 3420 Internet Media Type message/sipfrag