| 摘要 |
PCT No. PCT/FI95/00491 Sec. 371 Date Jun. 20, 1997 Sec. 102(e) Date Jun. 20, 1997 PCT Filed Sep. 11, 1995 PCT Pub. No. WO96/08937 PCT Pub. Date Mar. 21, 1996In a radio telephone system including subscriber devices, such as mobile phones, that function in a network wherein a control channel is used to transfer call control messages between the network and a subscriber device, and a call consists of three consecutive phases involving a connection setup phase, an information transfer phase, and a connection termination phase, with the setup and termination phases including messages on the control channel, a call waiting service in which the network sends the subscriber device a control message announcing the arrival of a new call via the control channel, which service is valid in desired phases or parts of phases of the call.
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