Abstract: A method of resynchronizing data transfer between a first modem assigned to a central office and connected by a dedicated line a second modem assigned to a remote subscriber following a fault caused by a ringing signal. A ringing ID is set up in the central office modem as soon as a ringing signal is to be sent to the subscriber modem, and a ringing alert is transferred to the connected subscriber modem. Transmission of the pilot tone accompanying the data transfer set by the central office modem is interrupted as is the clock frequency synchronization implemented during data transfer in the subscriber modem with the pilot tone as reference. The two modems are put on hold to save the characteristic parameters for the momentary data transfer followed by transfer of the ringing signal via the dedicated line to the subscriber modem.

Abstract: A method of resynchronizing data transfer between two modems connected by a dedicated line following a fault caused by a ringing signal, whereby at least one of the modems is assigned to a central office and the other modem is assigned to a remote subscriber, is implemented by setting a ringing ID in the central office modem as soon as a ringing signal is to be sent to the subscriber modem connected via the dedicated line, transferring a ringing alert to the connected subscriber modem, interrupting transmission of the pilot tone accompanying the data transfer set by the central office modem and interrupting clock frequency synchronization implemented during data transfer in the subscriber modem with the pilot tone as reference, signalling the central office modem and subscriber modem on hold to save the characteristic parameters for the momentary data transfer in the two modems followed by transfer of the ringing signal via the dedicated line to the subscriber modem, resetting the ringing ID in the central of