Caller ID and call waiting for multiple CPES on a single telephone line
First Claim
1. A method for receiving caller identification (CID) information from a central office with a plurality of customer premises equipments (CPEs) coupled to a single telephone line, said method comprising the steps of:
- selecting one of said plurality of CPEs as a primary customer premises equipment (CPE);
detecting a CPE alerting signal (CAS) tone transmitted from said central office with each CPE of said plurality of CPEs while one or more of said plurality of CPEs is in an off-hook condition;
causing each CPE of said plurality of CPEs to go on-hook in response to detecting said CAS tone;
detecting if said single telephone line is in an on-hook condition;
controlling said primary CPE to go off-hook after said single telephone line is detected in said on-hook condition; and
controlling said primary CPE to transmit an acknowledgement signal to said central office while said primary CPE is off-hook.
6 Assignments
0 Petitions
Accused Products
Abstract
In accordance with the present invention, provided is a system allowing a plurality of conforming customer premise equipment ("CCPEs") on a single telephone line to display a third party'"'"'s caller information while users are communicating with a second party. One CCPE of the plurality of CCPEs is a primary CCPE, whereas the remaining CCPE(s) are secondary CCPE(s). While the users are communicating with the second party using any one or more of the CCPEs, each CCPE detects whether a CPE alerting signal ("CAS") tone has been transmitted by the central office, thereby detecting when the third party is calling. Each CCPE responds by disconnecting the CCPE'"'"'s telephone from the telephone line. After all of the CCPEs are on-hook, the primary CCPE then goes off-hook and transmits a CAS acknowledgement ("CAS ACK") signal to the central office. All of the CCPEs then wait for the central office to transmit the CID information in response to the CAS ACK signal.
41 Citations
26 Claims
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1. A method for receiving caller identification (CID) information from a central office with a plurality of customer premises equipments (CPEs) coupled to a single telephone line, said method comprising the steps of:
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selecting one of said plurality of CPEs as a primary customer premises equipment (CPE); detecting a CPE alerting signal (CAS) tone transmitted from said central office with each CPE of said plurality of CPEs while one or more of said plurality of CPEs is in an off-hook condition; causing each CPE of said plurality of CPEs to go on-hook in response to detecting said CAS tone; detecting if said single telephone line is in an on-hook condition; controlling said primary CPE to go off-hook after said single telephone line is detected in said on-hook condition; and controlling said primary CPE to transmit an acknowledgement signal to said central office while said primary CPE is off-hook. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for receiving caller identification (CID) information from a central office with a plurality of customer premises equipment (CPEs) coupled to a single telephone line, said system comprising:
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means for selecting one of said plurality of CPEs as a primary customer premises equipment (CPE); means for detecting a CPE alerting signal (CAS) tone transmitted from said central office with each CPE of said plurality of CPEs while one or more of said plurality of CPEs is in an off-hook condition; means for causing each CPE of said plurality of CPEs to go on-hook in response to detection of said CAS tone; means for detecting if said single telephone line is in an on-hook condition; means for controlling said primary CPE to go off-hook after said single telephone line is detected in said on-hook condition; and means for controlling said primary CPE to transmit an acknowledgement signal to said central office while said primary CPE is off-hook. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for receiving caller identification (CID) information from a central office with a plurality of customer premises equipment (CPEs) in use on a single telephone line, said system comprising a CPE capable of being configured at least as a primary CPE or a secondary CPE, said CPE comprising:
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a receiver having an input lead capable of being connected to said single telephone line; a polarity guard having a first lead capable of being connected to said single telephone line; a comparator having an input lead coupled to a second lead of said polarity guard; a controller having a first input lead coupled to an output lead of said comparator, a second input lead coupled to a first output lead of said receiver, and a third input lead coupled to a second output lead of said receiver; a processor having a first input lead coupled to said output lead of said comparator, a second input lead coupled to said first output lead of said receiver, a third input lead coupled an output lead of said controller, and a first output lead coupled to a fourth input lead of said controller; a signal generator having an input lead coupled to a second output lead of said processor and a first output lead coupled to a fourth input lead of said processor; a coupler having an input lead coupled to a second output lead of said signal generator; a first switch having a first lead coupled to a third output lead of said processor, a second lead coupled to an output lead of said coupler, and a third lead coupled to said second lead of said comparator; a frequency detector having an input lead coupled to a third output lead of said receiver and a first output lead coupled to a fifth input lead of said processor; and a second switch having a first lead coupled to a fourth output lead of said processor, a second lead capable of being connected to said single telephone line, and a third lead capable of being connected to a telephone. - View Dependent Claims (25)
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26. A method for receiving caller identification (CID) information from a central office with a plurality of customer premises equipments (CPEs) coupled to a single telephone line, said method comprising the steps of:
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causing a first group of one or more of said CPEs to be in an on-hook condition; causing a second group of one or more of said CPEs to be in an off-hook condition; detecting a CPE alerting signal (CAS) tone transmitted from said central office using said plurality of CPEs; responding to a detected CAS tone using said plurality of CPEs, thereby causing the central office to transmit said CID information; and receiving said CID information transmitted by said central office with each of said CPEs in said first and second groups.
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Specification