Telephone interconnected paging system with dial click to pulse converter

Patent 3995121 Issued on November 30, 1976. Estimated Expiration Date:

November 30, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2941043

2953647

2998489

3087999

3312784

3315039

3430002

3461241

3879583

Inventor

Alvis, Royal F.

Assignee

Alvis; Royal P.

Application

No. 543786 filed on 01/24/1975

US Classes:

379/339, With signal conversion (e.g., dial to DTMF, analog to PCM)340/7.31, Message input379/342, Electronic (e.g., logic circuitry)379/82Having specified call initiation (e.g., ringing) responsive circuitry

Examiners

Primary: Claffy, Kathleen H.
Assistant: Myers, Randall P.

Attorney, Agent or Firm

Lane, Aitken, Dunner & Ziems

International Class

H04M 11/02 (20060101)

Abstract

A telephone paging system includes a central interconnect station responsive to phoned information for automatically transmitting the caller's verbal message to a designated portable paging receiver. The central station instructs the caller by means of a prerecorded message to provide a brief voice message preceded by touch tone or rotary dial digits identifying the receiver to be paged. The paging code digits and message are both tape-recorded by the central station. If the transmitter is free, the recorded paging code is automatically played back through a decoding circuit responsive to rotary dial clicks as well as touch tones. The output of the decoding circuit keys a radio transmitter which transmits a corresponding code followed by the recorded voice message. The central station employs a plurality of recorders. If one recorder is in operation, an incoming call is transferred to the next recorder. Recordings awaiting access to the transmitter are taken in a predetermined order.