A COMMUNICATIONS ADAPTOR FOR A REMOTE ACTION TERMINAL

摘要

Communication adapter (12) for remote-action terminal (5) connected to a telephone line (3) in parallel with a telephone set (2) in order to exchange remote-action information via a remote-action network, with at least one server (4) by way of the telephone line, within a frequency band different from that utilized by the signals relating to the telephone set. The adapter is provided with a transceiver (14) transmitting binary data by frequency hopping from one to the other of two frequencies (F1 and F2) as does the network with which it communicates through rotation in precedence. It contains a remote- signalling device (15) equipped with means of controlling the transmission of signalling characteristic of observation of an absence of communication by exchange of signals, following a predetermined time lapse, between on the one hand the network, and on the other hand the transceiver with which it is associated in the communication adapter containing it. IMAGE