Digital data switching system utilizing voice encoding and decoding circuitry
阅读：547发布：2022-02-16
专利汇可以提供Digital data switching system utilizing voice encoding and decoding circuitry专利检索，专利查询，专利分析的服务。并且The specification discloses a system for transmitting analog signal information via telephone lines which includes an encoding station for converting the analog signal information into a series of pulses spaced apart by periods proportional to the magnitude of the analog signals. The encoding station transmits digital dialing data and the series of pulses via a telephone line to a central switching station which is operable to switch the data and pulses between a plurality of telephone lines. Decoding circuitry associated with a plurality of transmitting telephone lines operates to produce addresses corresponding to telephone lines presenting information to be switched. Contention circuitry operates to resolve simultaneous information presentation to the system. A random access memory is associated with the decoding circuitry. Circuitry is responsive to dialing data in order to store the identity address of the receiving telephone line in the random access memory. Accessing circuitry is responsive to a pulse transition for causing the memory to generate an address code. Decoding circuitry is responsive to the output of the memory for selection of the receiving telephone line. Circuitry is responsive to the output of the decoding circuitry for transmitting a representation of the pulse transition to the desired receiving telephone line and to a remote station. A decoding circuit is located at the remote station for converting the series of pulses into representation of the original analog signal information.，下面是Digital data switching system utilizing voice encoding and decoding circuitry专利的具体信息内容。
1. A digital data switching system comprising: means for receiving a plurality of data lines; means common to each of said data lines and responsive to binary digital signals on any of said data lines for establishing a virtual data line connection; and means common to each of said data lines and responsive only to a pulse transition on a data line for transmitting a representation of said pulse transition to the virtually connected data line.
2. The system of claim 1 wherein said data lines comprise telephone lines and wherein said binary digital signals comprise dialing signals, and further comprising: means for storing address data contained in said dialing signals; and means responsive to said pulse transition for accessing said stored address data to establish a telephone line connection.
3. The system of claim 2 and further comprising: means for applying switching priority to incoming calls according to a predetermined hierarchy, such that switching is sequentially provided to various telephone lines according to the predetermined hierarchy.
4. The system of claim 2 wherein switching operation is provided to one of said telephone lines only when signals appear on said telephone lines.
5. A system for switching digital signals transmitted via data lines comprising: terminals connected to a plurality of incoming and outgoing data lines; accessing circuitry connected to said incoming data lines; memory means connected to said accessing circuitry; means responsive to digital data line address signals on one of said incoming data lines for storing address data in said memory means; means responsive to a pulse transition appearing on an incoming data line for activating said accessing circuitry to access said memory means and to cause said memory means to generate a digital address code representative of the desired outgoing data line; decoder circuitry connected to the output of said memory means and operable in response to said address code to generate a representation of said pulse transition; and means for transmitting said representation of said pulse transition to the desired outgoing data line.
6. The system of claim 5 wherein said memory means comprises a random access memory.
7. A telephone line digital switching system comprising: a plurality of normally disabled transition detector circuits each operable to receive digital data from a different telephone line; means responsive to dialing signals on any one of said telephone lines for storing address data and for enabling the transition detector circuit associated with the calling telephone line; said enabled transition detector circuit operable to change state upon receiving a pulse transition over the calling telephone line; means responsive to a change of state of said enabled transition detector circuit for utilizing said stored address data for generating a digital address code representative of the desired outgoing telephone line; decoder means connected to the output of said memory means and operable in response to said address code to generate a representation of said pulse transition; and means for transmitting said representation of said pulse transition to the desired outgoing telephone line.
8. The switching system of claim 7 and further comprising: a plurality of sequencer circuits each corresponding with a group of telephone lines and interconnected in a series chain; said sequencer circuits generating timing signals when actuated in response to switching operations; the sequencer circuits connected at the front of said series chain operable to be actuated prior to actuation of sequencer circuits connected at the rear portion of said series chain.
9. The switching system of claim 8 wherein the sequencer circuits connected behind an actuated sequencer circuit generate disable signals.
10. The switching system of claim 8 wherein each of saId sequencer circuits comprises a series of inverter circuits.
11. The telephone switching system of claim 7 and further comprising: means for enabling one of a plurality of transition detector circuits for operation according to predetermined selection criteria upon the occurrence of simultaneous transition detections at said detector circuits.
12. The telephone switching system of claim 7 wherein said telephone lines are arranged in a plurality of line service groups, and wherein said decoder means is common to all of said line service groups and includes line service group resolution logic and destination line decoding logic.
13. A system for transmitting analog signal information via telephone lines comprising: means for converting said analog signal information into a series of pulses proportional to the magnitude of said analog signals; means for transmitting dialing data and said series of pulses via a telephone line; a central switching station connected to a plurality of telephone lines and operable to receive said dialing data; a memory associated with switching station; means responsive to said dialing data for storing address data in said memory; decoder means responsive to the output of said memory for connecting a calling telephone line with a called telephone line for transmission of representations of transitions of said series of pulses; and means connected to said called telephone line for converting said representations of said transitions into representations of said analog signal information.
14. The system of claim 13 wherein said transmitting means comprises a voltage controlled oscillator.
15. The system of claim 13 wherein said means for converting comprises a first capacitor connector at one terminal to receive said pulses, a series connected resistor and a second capacitor connected across said first capacitor; and a speaker connected across said second capacitor for broadcasting said analog signal information.
16. The system of claim 13 and further comprising: means for transmitting and receiving binary digital data through said calling and called telephone lines concurrently with transmission of said converted analog signal information.
17. A system for communicating analog and binary digital information comprising: a multiplicity of terminals for receiving and sending information, said terminals each including means for converting analog amplitude signal information into analog pulse duration information signals; means for combining said analog pulse duration information signals and binary digital data information signals into a pulse train for transmission; transmission means for conveying said pulse train from said terminals; means for receiving said pulse train; means connected to said receiving means for discriminating and separating said pulse duration information signals and said binary digital data information signals from said pulse train; switching means responsive to the information conveyed within signals for directing said information from one terminal to one or more of said terminals; and means at each of said terminals for reconstruction of said analog amplitude information signal from said pulse duration information signal.
18. The system of claim 17 wherein said converting means comprises: a voltage controlled oscillator.
19. The system of claim 17 wherein said combining means comprises: means for detection of the presence of said binary digital data presented for transmission via said transmission means; means for interruption of the conveyance of said analog pulse duration information signal to said transmission means; means for applying said binary digital data to said transmission means; means for synchronizing transmission of said binary digital data to receiving terminal means; means for detection of completion of transmission of said binary digital data information to transmission means; and means for restoration of transmission of said analog pulse duration information signal.
20. The terminal system of claim 19 wherein said discriminating and separating means comprises: means for synchronizing said transmitting terminal means; means for detecting the presence of said binary digital information signal from said transmission means; and means for signaling the presence of a valid binary digital information signal bit present on the transmission means.
21. The system of claim 17 wherein said reconstruction means comprises: means for generating a constant width and constant amplitude pulse for each transition of said pulse train; and means for connecting said constant width and constant amplitude pulses into an analog voltage signal proportional to the repetition rate of said constant width and constant amplitude pulses.
22. The system of claim 17 wherein said reconstructing means comprises: a one-shot multivibrator; a final capacitor connected at one terminal to said one-shot multivibrator to receive said pulses; a series connected resistor and second capacitor connected across said first capacitor; and speaker means connected across said capacitor for transducing said analog amplitude information signal.
23. The system of claim 17 wherein said transmission means comprises a multiplicity of telephone lines each terminating at one end at said switching means and each terminating at its other end at one of said terminals.
24. The system of claim 23 wherein said switching means comprises: means for interpreting and processing said binary digital data information; means for routing said pulse train received from said receiving means to a corresponding one of a multiplicity of a transmitting means each connected to one of a multiplicity of said telephone lines; and means for transmitting said routed pulse train to said telephone lines and to said terminal means terminating thereon.
25. The system of claim 24 wherein said receiving means comprises a line receiver.
26. The system of claim 17 wherein said pulse discriminating and separating means comprises: means for synchronizing to said transmission means, means for detecting the presence of said binary digital information from said receiving means; means for detecting the presence of a valid binary digital information signal from said receiving means; and means for signaling the presence of a valid binary digital information signal bit present at the receiving means.
27. The system of claim 26 wherein said synchronizing means comprises: means for utilizing said pulse train transmitted to a terminal for deriving a transmit clock.
28. The system of claim 26 wherein said detecting means comprises: a gate, and a pair of multivibrators connected in series with said gate.
29. In a system for transmitting analog and digital signal information via telephone lines, the combination comprising: a voltage controlled oscillator for converting said analog signals into digital pulses having time durations proportional to the amplitude of said analog signals, means for generating binary digital data, means for combining said binary digital data with said digital pulses, means for transmitting said combined digital pulses and said binary digital data over said telephone line, means at a remote station for receiving said digital pulses and said binary digital data, means for separating said received digital pulses and said binary digital data, low bandpass filter means for reconstructing said analog signal information from said digital pulses, speaker means connected across said filter means for broadcasting said analog signal information, and means for directing said binary digital data to a selected remote terminal.
30. The combination of claim 29 wherein said means for generating said binary digital data compriSes: a load shift register for receiving binary digital data from a terminal source, counter means, and a clocking register for clocking said digital data from said shift register for a period determined by said counter.
31. The combination of claim 29 wherein said low bandpass filter means comprises a first capacitor connected at one terminal to said receiving means to receive said pulses, and a series connected resistor and second capacitor connected across said first capacitor.
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