Dialing system
First Claim
Patent Images
1. An improved telephone dialing system comprising a telephone substation;
- said substation comprising;
a network;
bridge means connecting said network to the telephone lines;
hook switch contacts between said bridge means and said telephone lines;
at least a first and a second conductor means extending from said bridge means for coupling said network through said bridge means and said hook switch contacts to said telephone lines;
first switching means in at least one of said first and second conductors for completing the connection of said network to said bridge means;
control means for switching said first switching means between conducting and non-conducting states;
said control means operated responsive to an open loop condition;
said dial signal generating means including memory means for storing telephone numbers therein;
first isolating circuit means to couple said memory means to said telephone lines for powering said memory means when said telephone substation is in the on-hook condition;
internal power supply means for powering said dial signal generating means in the off-hook condition; and
said bridge means including second isolating circuit means for connecting said internal power supply means to receive power from said telephone lines.
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Accused Products
Abstract
An improved dialing system, basically powered through the line, that provides automatic dialing of stored, frequently used numbers and the last number dialed. Self-test capabilities are provided to enable and test all the stored number memory locations automatically. Outgoing call restrictions are provided with a programmable code to bypass the call restriction. The system automatically converts push button dialing to rotary outpulsing, or generates dual tone multi-frequency dialing signals.
70 Citations
14 Claims
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1. An improved telephone dialing system comprising a telephone substation;
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said substation comprising; a network; bridge means connecting said network to the telephone lines; hook switch contacts between said bridge means and said telephone lines; at least a first and a second conductor means extending from said bridge means for coupling said network through said bridge means and said hook switch contacts to said telephone lines; first switching means in at least one of said first and second conductors for completing the connection of said network to said bridge means; control means for switching said first switching means between conducting and non-conducting states; said control means operated responsive to an open loop condition; said dial signal generating means including memory means for storing telephone numbers therein; first isolating circuit means to couple said memory means to said telephone lines for powering said memory means when said telephone substation is in the on-hook condition; internal power supply means for powering said dial signal generating means in the off-hook condition; and said bridge means including second isolating circuit means for connecting said internal power supply means to receive power from said telephone lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An improved telephone repertory dialing system including a telephone substation network,
first bridge means between said network and telephone lines for connecting said substation to other telephone lines, hook switch contacts between said bridge means and said telephone lines, conductor means for connecting said network to said bridge means, dial signal generating means, repertory memory means included in said dial signal generating means, the improvement characterized in this that: -
power connection means are provided for said memory means to obtain power from the line side of the hook switch contacts, internal power supply means connected to power said dial signal generating means, and isolation means including second bridge means for connecting said internal power supply means to obtain power from said telephone lines while isolating said internal power supply means from a discharge path through the network. - View Dependent Claims (12, 13, 14)
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Specification