SIP (Session Initiation Protocol, RFC ) is a text-based application in the SIP specification (RFC ) to locate the proper resource in the network. RFC Client-Initiated Connections in SIP October the Trust Legal .. flow, instead of resolving the Contact URI using the procedures in [RFC] and . Canonical URL: ; File formats: Plain Text PDF Discuss this RFC: Send questions or comments to [email protected]
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Oracle Communications Converged Application Server supports cryptographic services, but specific algorithms that are used are subject to local availability and export control. Retrieved December 3, Oracle Communications Converged Application Server does not provide privacy support rfv described in sub-section 5. In the IMS context, there are certain network entities i.
RFC – Managing Client-Initiated Connections in the Session Initiation Protocol (SIP)
The IMS is meant to provide multimedia services over IP networks, but also needs a mechanism to charge users for it. Oracle Communications Converged Application Server does enforce uniqueness.
In the IMS it is possible for a user to have multiple terminals e. Moreover, event notification can be used to provide additional services such as voicemail i.
SCTP supported only for Diameter traffic. Moreover, the SIP INFO method extension is designed to carry user information between terminals without affecting the signaling dialog and can be used to transport the dual-tone multi-frequency signaling to provide telephone keypad function for users.
Source routing is the mechanism that allows the sender of a message to specify partially or completely the route the message traverses.
Numerous extensions exist and many more are proposed. Retrieved December 4, Retrieved 3 December Retrieved 5 December Other useful information describing the “Quality” of the document: PRACK, which is the request message used to tell the sender of a provisional response that his or her message has been received.
SIP extensions for the IP Multimedia Subsystem
The new SDP attributes are meant to describe the current status of the resource reservation, the desired status gfc the reservation to proceed with session establishment, and the confirmation statusto indicate when the reservation status should be confirmed. In the IMS framework it is fundamental to handle user identities for authentication, authorization and accounting purposes. These two extensions allow users to specify their preferences about the service the IMS provides.
Oracle Communications Converged Application Server supports applications that conform to this specification, but it does not provide an ISUP interface. Network address translation NAT makes it impossible for a terminal to be reached from outside its private networksince it uses a private address that is mapped to a public one when packets originated by the terminal cross the NAT.
The Private Header Extensions to SIP,  also known as P-Headers, are special header fields whose applicability is limited 323 private networks with a certain topology and characteristics of lower layers ‘ protocols. The state publication framework defines a new method: There exist analogous extension headers for handling the identification of services of users,  instead of the users themselves.
These include an efficient use of the radio interface by minimizing the exchange of signaling messages between the mobile terminal and the network, a minimum session setup time by performing tasks prior to session establishment instead of during session establishment, a minimum support required in the terminal, the support for iwtf and non-roaming scenarios with terminal mobility management supported by the access network, not SIPand support for IPv6 addressing. The aim of event notification is to obtain the status of a given resource e.
Other specific requirements are: This RFC has been in existence since June Oracle Communications Converged Application Server supports applications that conform to this specification.
Apart from all the explained extensions to SIP that make it possible for the IMS to work successfully, it is also necessary that the IMS framework interworks and exchanges services with existing network infrastructures, mainly the Public switched telephone network PSTN.
Oracle Communications Converged Application Server ietc backward compatibility as described in this specification. This request will be answered by the provisional reliable response code Session Progressthat will carry the SDP list of supported codecs by both the caller and the callee. In the IMS framework, it is required that once the callee is alerted, the chances of a session failure are minimum.
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32633 Comments on RFCs and corresponding changes are accommodated through the existing standardization process. Committed to connecting the world. The efficient use of network resources, which may include a radio interface or other low-bandwidth access, is essential in the IMS in order to provide the user with an acceptable experience in terms of latency.
Other than the exceptions noted, Oracle Communications Converged Application Server does 3236 impose any restrictions on implementing applications or functions that ietc compliant with those associated with the Application Server entity described in the specification.
When 32263 proxy server receives a request from an untrusted entity and authenticates the user i. Clear description of the referenced document:. Likewise, if the server does not support any of the client’s required extensions, it will send an error response with a list of its unsupported extensions.
The degree of stability or maturity of the document: To this end, the specific event notification extension  defines a framework for event notification in SIP, with two new methods: This extension uses three new header fields to support the negotiation process:.
ITU-T work programme
However, in such an scenario as the IMS framework, it is necessary to extend this reliability to provisional responses to INVITE requests for session establishment, this is, to start a call. In SIP, the route header field, ietc by the sender, supports this functionality by listing a set of proxies the message will visit.
Current information, if any, about IPR issues: Therefore, a mechanism is needed in order to route requests to the desired device or application. Retrieved November 29, Any explicit references within that referenced document should also be listed:.
Retrieved from ” https: To allow the sender to discover such entities and populate the route header field, there are mainly two extension header fields: This page was last edited on 10 Septemberat Merging the Internet and the Cellular Worlds 3 ed.