System and method for universal adaptation of a PSTN modem
AssigneeVTech Telecommunications Limited
InventorGary Rogalski
Life of this patent
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Abstract
A modem adapter is provided to adapt a modem to operate with a telephone system. The modem adapter includes a conductor detector, a voltage generator, and a dial-tone generator. The conductor detector is configured to detect live conductors on a telephone jack. The voltage generator is configured to generate an on-hook line voltage comparable to that normally expected by the modem and to deliver the generated on-hook line voltage to the modem. The dial-tone generator is configured to generate and deliver to the modem a first dial tone different from the second dial tone delivered by a telephone system to which the modem is attempting communication. A method for adapting a modem to a telephone system is also provided.
Claims20
A modem adapter for coupling between a modem and a telecommunications line, comprising:
- a conductor detector to detect live conductors on a telephone jack;
- a voltage generator to generate an on-hook line voltage comparable to that normally expected by the modem and to deliver the on-hook line voltage to the modem;
- and
- a dial-tone generator to generate and deliver to the modem a first dial tone different from a second dial tone delivered by a telecommunications system to which the modem is attempting communication.
A method for adapting a modem to operate with a telephone system, comprising:
- detecting which conductors on a telephone jack are live;
- routing an active connection to the detected live conductors;
- generating an on-hook line voltage comparable to that expected by the modem during normal operation;
- delivering the on-hook line voltage to the modem;
- and
- generating and delivering to the modem a first dial tone different from a second dial tone delivered by the telephone system.
A modem adapter for coupling between a modem and a telecommunications line, comprising:
- a main control unit;
- one or more comparators connected to the telecommunications line for sensing a live connector pair;
- a first switch for connecting to the live connector pair;
- and
- a second switch for connecting the modem to the telecommunications line,
- the main control unit generating and sending a dial tone different from a dial tone received from the telecommunications line to the modem and, upon detecting modem tones from the modem, sending a control signal to the second switch to connect the modem to the telecommunications line.
Dependencies are inferred from the claim text.