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We need your date of birth so we can confirm, as the web account holder, you're aged 18 or over.Once the web account has been created, you'll be able to apply online for an Oyster photocard.Other application examples include video conferencing, streaming multimedia distribution, instant messaging, presence information, file transfer and online games. SIP invitations are used to create multimedia sessions and carry session descriptions that allow UAs to agree on a set of compatible media types. Figure 7 is a simplified block diagram of components of a mobile device suitable for use as a user agent for carrying out aspects of the present disclosure. Figure 8 is a flow diagram of a method for use on a SIP server for authenticating a request in accordance with one embodiment of the present disclosure. Figure 9 is a flow diagram of a method for use on a SIP registrar server for managing a binding in accordance with one embodiment of the present disclosure.
In accordance with one embodiment, there is provided a method for performing a transaction call between an originating device and a terminating device, comprising: receiving, by a originating proxy server in a first cluster, a SIP message from the originating device over a first connection; and sending, by the originating proxy server, the SIP message to a routing proxy server in a second server cluster.
Details of the sessions are carried in the payload of SIP messages and are usually described with the Session Description Protocol (SDP) defined in RFC 4566.
SIP provides a registration function that allows UAs to upload their current locations for use by proxy servers.
SIP can be used for creating, modifying and terminating two-party (unicast) or multiparty (multicast) sessions consisting of one or several media streams.
Modifications can involve changing addresses or ports, inviting more participants, and adding or deleting media streams.