Hang up Clause Samples

Hang up. If ▇▇▇▇▇ wants to call a service (that is, where the remote end is not a subscriber), she does it the same way but uses its service identity instead of a subscriber. Even though IMS is (here) seen as an evolution of telephony, there are important contributions from data communication seen in many places of IMS. An IMS enabled device can in general handle several IMS calls to many subscribers and network services at the same time. It is similar to how a computer can handle multiple network connections to one or several other computers. The precise behavior is application-specific, but it should be remembered that just because one IMS call is active, it does not imply that other calls cannot be handled. IMS users are reachable on the IMS networks with their Public User Identities, that takes the form of an Uniform Resource Identifier (URI). Two types of URI are supported: • A SIP URI (as defined in RFC3261), like sip:▇▇▇▇▇@▇▇▇.▇▇▇▇▇▇▇.▇▇▇. Such URIs are suitable for use from the Internet. • A TEL URI (as defined in RFC3966), like tel:+▇▇▇▇▇▇▇▇▇▇. This format enables an IMS terminal to be reachable in traditional telephone networks. The operator allocates one or more public user identities for use within a subscription. When the device is switched on and connects to the IMS network, the device and the network engage in a process called IMS registration to make the user reachable under some of the identities. It is possible to be reachable using several public user identities at the same time. For example, if a SIP identity works on the Internet, and the TEL identity on the telephone network, it makes sense to have them both registered at the same time to be equally reachable from both worlds. The operator usually makes sure that in such case, if the user wants to be reachable on one of them, it implies also being reachable from the other. Services in traditional telephony, like conferencing or supplementary service self administration, are accessed using special phone numbers. A similar situation holds in IMS where a service is accessed using a Public Service Identity. If ▇▇▇▇▇ wants to take part in a conference, she dials into the conference using its public service identity. The conference server arranges for her participation. The identity is formatted as a SIP URI.