Caller ID and call waiting for multiple CPES on a single telepho

Details Caller ID and call waiting for multiple CPES on a single telepho Caller ID and call waiting for multiple CPES on a single telepho

1995-06-07

1996-11-12

Chin, Wellington

Telephonic communications

Reception of calling information at substation in wireline...

Blocking caller id transmission

379106, 379107, 379127, 379194, 379195, 379245, 379246, 379247, H03M 1500, H03M 1506, H03M 1100, H03M 300

Patent

active

055747779

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.

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The Analog Display Service Interface, pp. 70-75; IEEE Magazine, Apr. 1993.
Bellcore Special Report, "A Method and Apparatus for Detecting a Dual Tone Signal in the Presence of Speech" SR-TSV-002578 Issue 1 (1993).
Bellcore Special Report, "Customer Premises Equipment Compatibility Considerations for the Voiceband Data Transmission Interface" SR-TSV-002467 Issue 1 (1992).

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