voipeer-9----Page:8
1 2 3 4 5 6 7 8 9 10
|
Discussion of Group Scope Outputs This task group will produce one or more SIP Forum recommendations that define a common set of implementation rules for implementers who desire to interface an IP PBX with a SIP-enabled service provider. The recommendation(s) will specify which standards must be supported, provide precise guidance in the areas where the standards leave multiple options, supplement functionality gaps in existing protocols, and identify a baseline set of features that should be common to an IP PBX to service provider interface. Such guidelines will not preclude the implementation of additional SIP functionality and primitives that do not conflict with the common implementation rules of the recommendation(s). For purposes of this task group a SIP-enabled IP PBX is defined as a private, multi-user communications system that supports a clearly-defined baseline set of SIP standards along with other (optional) protocols. At a high level, the interface to the service provider utilizes a combination of SIP signaling and media transport using RTP. The interface to end-users of the IP PBX can be SIP or any other protocol capable of establishing a voice session (such as SCCP, H.323, directly connected analog “black phone”, etc.) While vendor implementation choices vary (i.e. the PBX may be comprised of multiple servers and SIP endpoints), the SIP signaling exchanged with a service provider must be traceable to a single account identity, which may be a separate identity from users of the PBX. In this respect, the PBX is to be viewed logically as a single SIP user agent for the purposes of the interface specification. This does not preclude, however, the capability for media to be exchanged directly between the service provider and PBX-controlled IP endpoints such as IP phones and media terminal adaptors. Output Recommendation(s) defining existing specs you must implement to minimally comply, to interface between an IP PBX and an ITSP using SIP and RTP/RTCP Definition of what we mean by an IP PBX: (ex: could be traditional PBX or collection of SIP stuff, could use other protocols inside) |