Line powered modem automatic answer device powered from equipment
First Claim
1. For use in a modem powered by the telephone line and connected to data equipment which sends a data equipment modem answer control signal having an answer state when ready to receive data and a no-answer state when not ready to receive data;
- an automatic answer device operative upon receipt of a ring signal from said telephone line when said modem answer control signal is in said answer state to place said modem in the answer mode (off-hook) and to pass data received by said modem to said data equipment, said automatic answering device comprising;
a ring detector means generating a ring indicator signal when said ring signal appears on said telephone line;
an answer relay for connecting said modem to said telephone line according to a relay answer signal;
energy storage means for receiving and storing said modem answer control signal; and
an answer control means connecting said answer relay and said energy storage means for producing said relay answer signal upon the receipt of said ring indicator signal when said modem answer signal is in said answer state for causing actuation of said answer relay from said storage means thereby connecting said telephone line to said modem.
2 Assignments
0 Petitions
Accused Products
Abstract
An automatic answering device controlled by attached data equipment and used with a modem powered from the telephone line. The modem and automatic answering device are automatically connected to and subsequently powered by the telephone line when a ring signal has occurred on the telephone line and the data equipment has indicated that it is ready to receive data. The energy needed to connect the modem to the telephone line is slowly accumulated from a data equipment over a period of time prior to the connection of the modem to the telephone line. The modem automatically hangs up when the local data equipment signals disconnect or the modem at the other end of the telephone line disconnects.
63 Citations
9 Claims
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1. For use in a modem powered by the telephone line and connected to data equipment which sends a data equipment modem answer control signal having an answer state when ready to receive data and a no-answer state when not ready to receive data;
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an automatic answer device operative upon receipt of a ring signal from said telephone line when said modem answer control signal is in said answer state to place said modem in the answer mode (off-hook) and to pass data received by said modem to said data equipment, said automatic answering device comprising; a ring detector means generating a ring indicator signal when said ring signal appears on said telephone line; an answer relay for connecting said modem to said telephone line according to a relay answer signal; energy storage means for receiving and storing said modem answer control signal; and an answer control means connecting said answer relay and said energy storage means for producing said relay answer signal upon the receipt of said ring indicator signal when said modem answer signal is in said answer state for causing actuation of said answer relay from said storage means thereby connecting said telephone line to said modem. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification