| 摘要 |
A device and method for informing a subscriber who is data-communicating of an incoming call in a switching system of a data communication system. The device includes a data access network subsystem for providing a data communication service over a prescribed channel in response to a data communication service request, and transmitting a call incoming alarm message to the subscriber, who is data-communicating through a telephone line, in the form of a data control code upon receipt of a call incoming message for the subscriber; a subscriber access network subsystem for transmitting the call incoming message to the data access network subsystem and receiving the call incoming alarm message to transmit the received call incoming message to the subscriber through the telephone line; and a switch network subsystem for switching signals between the data access network subsystem and the subscriber access network subsystem. The method includes the steps of transmitting a call incoming message from the subscriber access network subsystem to the data access network subsystem via the switch network subsystem when the incoming call to the subscriber who is data-communicating is received; transmitting a call incoming alarm message from the data access network subsystem to the subscriber access network subsystem via the switch network subsystem; and transmitting the call incoming alarm message from the subscriber access network subsystem to the subscriber via a data communication path to inform the subscriber of the incoming call. |
