| 摘要 |
A private cellular radio telecommunication system is provided that is arranged to support the handout of calls from the private system to an external cellular radio telecommunication system. The private system includes a base station controller that detects when a mobile subscriber unit within the private system with a call in progress, the call in progress not involving the external system, is about to move from the private system into the external system. To facilitate the handout of the call from the private system to the external system the base station controller of the private system sets up a "phantom" call through the external system, the "phantom" call being between the same part as is the call in progress so that as the mobile subscriber unit leaves the private system the phantom call takes over from the call in progress thus accomplishing handouts. |
