| 摘要 |
PROBLEM TO BE SOLVED: To provide an inter-connection terminal-ISDN telephone set communication method, capable of transmitting incoming information and calling information during data communication, using a simple configuration between a connection terminal and an ISDN telephone set without having to use a plurality of interface. SOLUTION: When both data communication and speech communication are performed at the same time by connecting a connection terminal 3 to an ISDN telephone set 2, this method ensures a part of communication data between the set 2 and the terminal 3 for inter-connection terminal-ISDN telephone set communication only and transmits the calling out information and calling in information of voice call during the data communication.
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