| 摘要 |
PURPOSE:To automatically connect a line, and to lighten the trouble of an operation by providing an opposite party designating means to designate the opposite party of a communication, a terminal designating means to designate the terminal of the opposite party, and a means to designate only the opposite party when an answer from the terminal designated by the terminal designating means in not returned. CONSTITUTION:An operator inputs the opposite party dial number attached with a subaddress. When the calling side terminal receives a CONN command, it decides which the command is an affirmation command or a negation command. When it judges that it has received the affirmation command, it transmits a connection complete CONN ACK command, shown by 45 in a figure, to the calling side terminal, and a communication state is established. When it receives the negation command, the calling side terminal automatically deletes the subaddress from the opposite party dial number, and transmits the opposite party dial number without the subaddress. Accordingly, even when the subaddress of a callee terminal has been changed, the line is connected to the opposite party side terminal without any judgement of the calling side operator, and a communication can be performed.
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