| 摘要 |
<p>The invention relates to a method and apparatus for providing an interworki ng function (IWF) for a first and second protocol based network, for example, a n H.323 protocol based network and an SIP protocol based network. The method compris es a method of interworking for use in interworking between a first protocol base d network and a second protocol based network, the method comprising: receivin g, at an interworking gateway server serving said first and second protocol based networks, a request from an endpoint in the first or second protocol based networks, establishing a state machine in memory, including an idle state, wherein, fo r each state of said state machine, a message associated with that state is categorized as one of: (a) a triggering message for a predetermined action, (b) a non-triggerin g message, and (c) an error message, establishing a translation table in said memory wherein an address formatted in said first protocol has a one-for-one correspondence wi th an address formatted in said second protocol, processing said request in accordance with said translation table and said state machine and permitting communication between said first and second endpoints utilizing a reliable transport protocol, wherein for the idle state: (a) a registration message is a triggering message for an action of adding registration information, (b) a Q.931 message is non-triggering and (c) an H.245 message is an error message.</p> |
