| 摘要 |
An incoming call transfer terminal for transferring to a third-party terminal a call-setting message coming from a calling terminal. The incoming call transfer terminal receives the call-setting message over a first communication channel from the calling terminal. Given the message, the incoming call transfer terminal generates a new call-setting message destined to the third-party terminal by keeping intact those parts of the original message which are needed to establish a through communication channel from the calling terminal to the third-party terminal; by also preserving such information unique to the calling terminal as a calling sub-address and a called sub-address to be transmitted unchanged to the third-party terminal; and by rewriting other parts of the original message to indicate that the call is being transferred from the incoming call transfer terminal. The calling number of the calling terminal is transferred as carried on the calling sub-address, called sub-address or user-user information. The call-setting message thus generated is sent automatically to the third-party terminal over a second communication channel. <IMAGE> |
