| 摘要 |
PURPOSE:To avoid the interruption of communications due to the shortage of memory by deciding the size of capacity received from a receiver and that of transmitted image information. CONSTITUTION:When a transmission side dials to a reception side, the reception side receives a ringing signal R1, automatically responds to it, and transmits a nonstandard device signal NSF and a digital identification signal DIS following a callee station identification signal CED to the transmission side. The nonstandard device signal NSF is an option signal for identifying a specific user's request. With the aid of said signal, the capacity that the receiver can receive image information, that is, the capacity that a memory can store image information, is reported. Accordingly the transmission side can know the capacity that the receiver can receive image information, deciding the nonstandard device signal NSF, and compares it with the capacity of transmitted image information. If the latter is smaller, a nonstandard device setting signal NSS is transmitted. Prior to the actual transmission of image information, the receiver can previously know the capacity of received image information, whereby it can secure the memory corresponding to the capacity of image information.
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