Automatic pager calling device

• US 5,459,773 A
• Filed: 05/19/1994
• Issued: 10/17/1995
• Est. Priority Date: 05/20/1993
• Status: Expired due to Fees

• Current Assignee: Hong S. Hwang
• Original Assignee: Hong S. Hwang
• Inventors: Hwang, Hong S.
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): OEHLING, GEORGE J
• Application Number:
  US08/246,205
• Time in Patent Office: 516 Days
• Field of Search: 379/56, 379/57, 379/67, 379/88, 379/201, 379/210, 379/211, 379/212
• US Class Current: 340/7.31
• CPC Class Codes: H04M 1/658 Means for redirecting recorded messages to other extensions or equipment
• CPC Class Codes: H04M 11/022 Paging systems personal calling arrangements or devices G08B3/1008; selective calling networks H04W84/022

Abstract

An automatic pager responds to a caller to input the caller'"'"'s identification code and transmit a received identification code to an absent subscriber possessing the pager. The device includes: a sensor for ringing signals on public telephone lines; an audio frequency detector for dial tones, busy tones, click tones and acceptance signals from public telephone lines: a DTMF generator responds to a stored subscription number signal and transmits it via public telephone lines; a DTMF receiver responds to a DTMF signal from public telephone lines to generate the called subscription number; an audio synthesizer generates a message indicating the subscriber'"'"'s absence, which message requests the caller'"'"'s identification code and is transmitted through public telephone lines; a hybrid circuit matches public telephone lines with the DTMF generator, DTMF receiver, audio frequency sensor, and audio synthesizer; a relay selectively connects public telephone lines with the ringing signal sensor and hybrid circuit; a keyboard derives the subscriber'"'"'s pager subscription number, the caller'"'"'s ID code, subscription number and serial number; a CPU: (1) inputs the subscriber'"'"'s subscription number, (2) responds to a caller during the subscriber'"'"'s absence by sending a message indicating the subscriber'"'"'s absence and requesting the caller to input his ID or telephone number, (3) re-forms a communicating loop when the caller'"'"'s ID or telephone number is received. (4) transmits the subscriber'"'"'s pager subscription number and received caller'"'"'s ID or telephone number and serial number to apprise the subscriber of a call during his absence.

Claims

1. An automatic pager calling device, comprising;

a ringing signal sensing means for sensing a ringing signal from public telephone lines;

an audio frequency signal detecting means for detecting a dial tone, busy tone, click tone, and acceptance tone from the public telephone lines;

a DTMF signal generating means for generating a first DTMF signal including a subscriber'"'"'s pager subscription number and transmitting said first DTMF signal to the public telephone lines;

a DTMF signal receiving means for receiving and reading a second DTMF signal from said public telephone lines and generating a subscription number received from a caller;

an audio synthesizing means for generating a message indicating a subscriber is absent and a message requesting input of the subscription number of the caller, and transmitting said messages to the public telephone lines;

a matching means for matching the public telephone lines with said DTMF signal generating means, said DTMF signal receiving means, said audio frequency signal detecting means, and said audio synthesizing means for enabling;

(1) an output of said DTMF signal generating means and said audio synthesizing means to be transmitted to said public telephone lines without substantial attenuation or distortion, and (2) steady receipt of said DTMF signals and audio frequency signals from said public telephone lines by said DTMF signal receiving means and audio frequency signal detecting means;

a switching means for selectively connecting and disconnecting said public telephone lines with said ringing signal sensing means and said matching means;

a key inputting means for deriving the subscriber'"'"'s pager subscription number;

a memory for storing the subscriber'"'"'s pager subscription number, the caller'"'"'s identification code or subscription number, and a serial number and;

a control means for storing in said memory the subscriber'"'"'s pager subscription number derived by said key inputting means and controlling said audio frequency signal detecting means, said switching means, said audio synthesizing means, said matching means, said DTMF signal generating means, said DTMF signal receiving means and said memory,

said control means controlling said switching means and said audio synthesizing means in response to a ringing signal being detected by said ringing signal sensing means so said public telephone lines are coupled to said matching means for enabling the subscriber'"'"'s pager subscription number to be transmitted through said public telephone lines;

said control means (a) receiving and storing in said memory the caller'"'"'s subscription number and the serial number received by said DTMF signal receiving means;

(b) activating said switching means to selectively couple and decouple said public telephone lines with said matching means; and

(c) supplying the subscriber'"'"'s pager subscription number and the received caller'"'"'s subscription number and serial number stored in said memory to said DTMF signal generating means thereby to activate said DTMF signal generating means so it transmits said first DTMF signal indicative of the pager subscription number and the caller'"'"'s subscription number and the serial number to said matching means in accordance with a signal indicative of the state of communication lines as derived from said audio frequency signal detecting means to call the subscriber'"'"'s pager and send the caller'"'"'s subscription number.

2. An automatic pager of claim 1 further including a display means responsive to said control means for indicating the occurrence of an error in response to the pager subscriber'"'"'s number derived by the subscriber differing from the number for the pager, or no pager subscriber'"'"'s number being derived or an error in the messages and a serial number stored in said memory.

3. An automatic pager of claim 1 wherein:

said control means includes a central processing device.

4. An automatic pager of claim 3, wherein:

said central processing means associates with serial number the received caller'"'"'s subscription number to confirm the caller who calls the subscriber during absence of the subscriber by re-transmitting the caller'"'"'s subscription number, said serial number being included in a re-transmission command from the subscriber in response to the caller'"'"'s subscription number received through the public telephone lines including an instruction for re-transmission of messages which the subscriber is unable to receive.