Patent ID: 6876469

Claim:
A transmitting/receiving system provided with a data back-up function, comprising: transmitting/receiving apparatuses connected to each other so as to be able to transmit/receive data via a network or telephone line, the transmitting/receiving apparatuses each including: storage means for storing transmission/reception data, the storage means being constituted by a volatile memory; control means for transferring, due to shut-down of a power source of one of the transmitting/receiving apparatuses, the data stored in the storage means of the one transmitting/receiving apparatus whose power source is shut down, to another transmitting/receiving apparatus which is connected to the one transmitting/receiving apparatus to store and hold the data; and a control section capable of arbitrarily setting and registering a plurality of destination transmitting/receiving apparatuses in order to transfer the data stored in the storage means due to shut-down of the power source, to the other transmitting/receiving apparatus, wherein, in response to shut-down of the power source, the control means confirms whether data can be transferred to the transmitting/receiving apparatuses which are connected via the network and set and registered, and the control means transfers the data stored in the storage means to a transmitting/receiving apparatus of the transmitting/receiving apparatuses which are connected via the network and set and registered to which the data can be transferred, and in the case where there is no transmitting/receiving apparatus among the transmitting/receiving apparatuses which are connected via the network and set and registered to which the data can be transferred, the control means confirms whether data can be transferred to external transmitting/receiving apparatuses which are connected via the telephone line and set and registered, and the control means transfers the data stored in the storage means to an external transmitting/receiving apparatus of the external transmitting/receiving apparatuses which are connected via the telephone line and set and registered to which the data can be transferred.