| 摘要 |
<p>The equipment (ER1) has a memory (ML) and an application module (MAP) applying application logics to certain signaling messages e.g. session initiation protocol (SIP) INVITE type signaling messages, relative to a given communication session and storing states corresponding to the logics in the memory. An assistance device (D) has a processing module (MT) to add a state identifier to one message before transmitting the message and for storing the identifier in the memory in correspondence to one state of one logic which is applied to the state in a case when the logic is applied to the message. The equipment implements the functions of serving-call session control function (S-CSCF) or proxy-call session control function (P-CSCF) proxies.</p> |
