Signal processor for use with a telephone system and a digital transmission line

• US 4,254,304 A
• Filed: 12/18/1978
• Issued: 03/03/1981
• Est. Priority Date: 09/26/1977
• Status: Expired due to Term

• Current Assignee: E-Systems Incorporated (Rtx Corporation)
• Original Assignee: E-Systems Incorporated (Rtx Corporation)
• Inventors: Fulghum, Donald P., Pate, Jerry W.
• Primary Examiner(s): Konick, Bernard
• Assistant Examiner(s): Popek, Joseph A.
• Application Number:
  US05/970,136
• Time in Patent Office: 806 Days
• Field of Search: 179/16 EC, 179/18 EB, 179/15 BY, 179/84 VF, 179/15 BV, 179/2 DP
• US Class Current: 379/93.33
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

A signal processor is provided for encoding telephone dialing signals received from a telephone system at a transmitting station and transmitted using a digital transmission system to a receiving station for decoding and application to a telephone system at the receiving station. The system includes circuitry connected to the telephone system at the transmitting station for detecting and receiving telephone dialing signals generated by the telephone system at the transmitting station. Circuitry is provided for storing the detected telephone dialing signals for a predetermined time period at the transmitting station. The system further includes circuitry interconnected between the circuitry for storing and the digital transmission system for selectively clocking this circuitry to generate digital representations of the telephone dialing signals for transmission to the receiving station. The system further includes circuitry connected to the digital transmission system at the receiving station for detecting and receiving the transmitted digital representations of the telephone dialing signals generated by the telephone system at the transmitting station and circuitry for decoding the digital representations of the telephone dialing signals at the receiving station for application to the telephone system at the receiving station.

Claims

1. A system for encoding telephone dialing signals received from a telephone system at a transmitting station, the encoded telephone dialing signals being transmitted using a digital format of a predetermined data transmission rate to a receiving station via telephone trunk lines for decoding and application to a telephone system interconnected to the telephone trunk lines at a receiving station, the telephone dialing signals having a predetermined data transmission rate other than the predetermined data transmission rate of the digital format, the system comprising:

means for receiving and storing rotary dial pulse telephone dialing signals received from the telephone system at the transmitting station for a predetermined time period;

time translation means for translating the predetermined data transmission rate of the rotary dial pulse telephone dialing signals to time translated rotary dial pulse telephone dialing signals at the predetermined data transmission rate of the digital format, such that the rotary dial pulse telephone dialing signals received from the telephone system at the transmitting station are transmitted to the receiving station in their original pulse form;

said time translation means including circuit means interconnected to said means for receiving and storing and to the telephone trunk lines at the transmitting station for selectively clocking said means for receiving and storing at the predetermined data transmission rate of the digital format to thereby cause said means for receiving and storing to convert stored rotary dial pulse telephone dialing signals stored in said means for receiving and storing to said time translated rotary dial pulse telephone, dialing signals for transmission to the receiving station;

means connected to the telephone trunk lines for receiving and storing said time translated rotary dial pulse telephone dialing signals from the transmitting station for a predetermined time period at the receiving station; and

circuitry interconnected to said means for storing and receiving and the telephone system at the receiving station for selectively clocking said means for receiving and storing at the receiving station to thereby generate rotary dial pulse telphone dialing signals at the original data transmission rate generated by the telephone system at the transmitting station for application to the telephone system at the receiving station.

2. The system of claim 1 and further including:

circuitry interconnected to the telephone system at the transmitting station for receiving speech signals generated by the telephone system;

means for encoding said received speech signals to generate digital representations of said speech signals for transmission to the receiving station;

circuitry interconnected to the telephone system at the receiving station for receiving transmitted digitized representations of said speech signals;

means for decoding said received transmitted digitized representations of said speech signals to generate decoded speech signals; and

means for applying said decoded speech signals to the telephone system at the receiving station.

3. A system for encoding telephone dialing signals received from a telephone system at a transmitting station, the encoded telephone dialing signals being transmitted using a digital format of a predetermined data transmission rate to a receiving station via telephone trunk lines for decoding and application to a telephone system interconnected to the telephone trunk lines at a receiving station, the telephone dialing signals having a predetermined data transmission rate other than the predetermined data transmission rate of the digital format, the system comprising:

means for receiving and storing tone signal telephone dialing signals received from the telephone system at the transmitting station for a predetermined time period;

means for converting at the transmitting station said tone signal telephone dialing signals into digital representations of said tone signal telephone dialing signals received at the transmitting station;

said means for converting at the transmitting station including circuit means interconnected to said means for receiving and storing and to the telephone trunk lines at the transmitting station for selectively clocking said means for receiving and storing at the predetermined data transmission rate of the digital format to thereby cause said means for receiving and storing to transmit digital representations of said tone signal telephone dialing signals for transmission to the receiving station;

means for converting at the receiving station the data transmission rate of the digital format of the digital representations of the tone signal telephone dialing signals received at the receiving station to the original data transmission rate of the tone signal telephone dialing signals for application to the telephone dialing system at the receiving station; and

said means for converting at the receiving station including tone generator means for generating tone signal telephone dialing signals corresponding to the transmitted digitized representations of the tone signal telephone dialing signals generated by the telephone system at the transmitting station for application to the telephone system at the receiving station.

4. The system of claim 3 and further including:

circuitry interconnected to the telephone system at the transmitting station for receiving speech signals generated by the telephone system;

means for encoding said received speech signals to generate digital representations of said speech signals for transmission to the receiving station;

circuitry interconnected to the telephone system at the receiving station for receiving transmitted digitized representations of said speech signals;

means for decoding said received transmitted digitized representations of said speech signals to generate decoded speech signals; and

means for applying said decoded speech signals to the telephone system at the receiving station.