Elapsed-time telephone monitor system
阅读：520发布：2024-01-22
专利汇可以提供Elapsed-time telephone monitor system专利检索，专利查询，专利分析的服务。并且A telephone monitor system having a plurality of monitors each connected in parallel to a separate telephone line to be monitored and communicating through parallel buss lines to a central record unit. The monitor counts the pulses of each digit dialed and stores the digits in a number register. It determines if an area code has been dialed and if a leading ''''1'''' has been dialed and accommodates for them. After the number has been stored it signals the user to enter an identification number which is also detected and stored in sequence. When the audible ring on the telephone line ends, the monitor begins counting the elapsed time and also requests time service of the central record unit. The central record unit sequentially interrogates the monitors until it detects one requesting service. When it detects a time service request it transfers the real time from a real time clock in the record unit to the monitor requesting service and then resumes sequential interrogation. When the call is completed, the monitor stops counting the elapsed time and requests record service of the central record unit. When the record unit detects a record service request it transfers the number called, the identification number, the elapsed time and the real time from the monitor to the central record unit. It resets the monitor and resumes sequential interrogation.，下面是Elapsed-time telephone monitor system专利的具体信息内容。
1. A telephone monitoring system for use with a plurality of telephones coupled to telephone lines comprising, a. a plurality of monitor units each including: detection means connected in parallel to a telephone line, sensing the placing of a telephone call thereon and capable of detecting the number dialed onto the telephone line; counting means connected to said detection means for determining the time duration of a call transmitted along the telephone line; and temporary storing means connected to said detection means for storing the real time of the commencement of the call, b. a central record unit including: clock means reading out real time; recording means for storing information; central unit control means connected to said clock means and to said recording means; and means for said central record unit sequentially interrogating each of said monitor units to determine if any of them have sensed a telephone call being placed on their respective telephone line being monitored, c. and coupling means interconnecting said plurality of monitor units with said central record unit. whereby in response to a determination by said means for sequentially interrogating that one of said monitor units has sensed a telephone call placed on its line, said central unit control means transfers the real time from said clock means through said coupling means to the temporary storing means, and at the completion of said call said central unit control means transfers the number detected, the time duration determined and the real time temporarily stored, from the monitor unit through through said coupling means to said recording means.
2. The system as in claim 1 wherein said coupling means includes parallel buss lines interfacing between said monitor units and said central record unit and wherein all of said monitor units are connected in parallel arrangement.
3. The system as in claim 1 wherein said detection means further includes: pulse counting means for counting the pulses as dialed onto said telephone lines, digit detector means for sensing the end of a dialed digit and producing an end of digit signal, digit counting means for counting the number of digits dialed, register means for storing the number dialed, and monitor unit control means interconnecting said last four mentioned means controlled by said end of digit signal and in response thereto storing the pulses counted by said pulse counting means into said register means, resetting said pulse counting means and advancing the count on said digit counting means.
4. The system as in claim 3 wherein said detection means further includes gating means connected to said digit counting means for providing an end of number signal.
5. The system as in claim 4 wherein said detection means further includes area code detection means connected to said pulse counting means capable of detecting the presence of a dialed area code and in response thereto setting said gating means for producing said end of number signal after ten digits have been dialed and in the absence of an area code producing said end of number signal after seven digits have been dailed.
6. The system as in claim 5 wherein said area code detection means includes means to detect the presence of a 1 or a O in the second dialed digit.
7. The system as in claim 3 wherein said detection means further includes leading 1 detection means connected to said pulse counting means and said digit counting means capable of detecting the presence of a dialed leading 1 and in response thereto inhibiting said control means from advancing the count on said digit counting means inhibiting the storage of said leading 1 in said number storage means.
8. The system as in claim 1 wherein said detection means includes line isolator means connected in parallel with the telephone line interconnecting the monitor unit with the telephone line.
9. The system as in claim 5 wherein said detection means further includes tone generation means for generating a tone signal onto the telephone line in response to said end of number signal.
10. The system as in claim 9 wherein said gating means produces a further end of number signal after additional digits have been dialed, said tone generation means stopping said tone signal in response to said further end of number signal.
11. The system as in claim 10 wherein said additional digits identify the telephone being monitoRed.
12. The system as in claim 10 wherein said additional digits identify the user of the telephone being monitored.
13. The system as in claim 1 wherein said detection means further includes end of ring detecting means responsive to the end of the audible ring on the telephone line, and open line detecting means responsive to the opening of the telephone line, said end of ring detector coupled to and starting said counting means and enabling said transfer of said real time from said clock to said temporary storage means and said open line detecting means coupled to and stopping said counting means and enabling the transfer from said monitor unit to said recording means.
14. The system as in claim 1 wherein said detection means includes first storage means for storing said number dialed, said counting means includes second storage means for storing the duration of the call and wherein said first storage means, said second storage means, and said temporary storage means are serially interconnected whereby data can be shifted therethrough.
15. The system as in claim 13 wherein said detection means includes means for producing a first service request signal upon the end of the audible ring on said telephone lines and a second service request signal upon the opening of the telephone line at the completion of a call.
16. The system as in claim 15 wherein said means for sequentially interrogating includes means to inhibit further interrogation upon receiving said first and second service request signals in response to the interrogation of the monitor unit producing said signals, and resuming interrogation after said unit has been serviced.
17. The system as in claim 16 wherein said transfer of said real time is in response to said first service request signal and said transfer from said monitor unit is in response to said second service request signal.
18. The system as in claim 1 wherein said means for sequentially interrogating includes: a plurality of selection means each one of which is associated with one of said monitor units, said selection means being serially connected such that the output of the selection means of one unit enables the input of the selection means of the next unit.
19. The system as in claim 18 wherein said selection means is a one bit shift register and wherein said means for sequentially interrogating further includes shifting means for causing the outputs of the selection means to sequentially shift from one selection means to the next.
20. The system as in claim 19 wherein said sequentially interrogating means produce a series of shift signals and wherein said coupling means include a selector shift buss line which transfers said shift signals sequentially to successive monitor units.
21. The system as in claim 20 wherein said detection means produces a real time flag signal after the end of the audible ring on the telephone lines and wherein said coupling means further include a real time flag buss and a data buss wherein said real time flag buss transfers said real time flag to said central record unit and said data buss transfers the real time from said clock means to said temporary means, both transfers being subsequent to the monitor unit receiving a shift signal.
22. The system as in claim 21 wherein said detection means produces a recorder flag signal upon the opening of the telephone line at the completion of a call and wherein said coupling means further include a recorder flag buss which transfers said recorder flag to said central record unit and wherein said data buss transfers the number dialed, the time duration determined and the real time temporarily stored from said monitor unit to said recording means, both transfers being subsequent to the monitor unit receiving a shift signal.
23. The system as in claim 22 wherein said central unit control means further includes reset means for producing a reset signal, said coupling means further includes a data control buss and a flag reset buss, whereby Upon receipt of a flag signal, said shift signals are transferred from said central record unit to said monitor unit by said data control buss and said reset signal is transferred from said central record unit to said monitor unit by said flag reset buss after said monitor unit has been serviced.
24. The system as in claim 1, wherein said clock means is capable of reading out the time of day, the day of the month and the month.
25. The system as in claim 1, wherein said monitor unit generates a first service request signal at the end of the audible ring on the telephone line and wherein said central unit control means includes first control means which in response to detecting said first request signal inhibits further interrogation, controls said transfer of said real time from said clock means to said temporary storage means and then resumes sequential interrogation.
26. The system as in claim 25 wherein said monitor unit generates a second service request signal upon the opening of the telephone line connection at the completion of a call and wherein said central unit control means further includes second control means which in response to detecting said second service request signal inhibits further interrogation, controls said transfer of information from said monitor unit to said recording means and then resumes sequential interrogation.
27. The system as in claim 1 wherein said recording means is a digital recorder.
28. In a telephone system including a plurality of telephones coupled to telephone lines, a plurality of monitor units each coupled to a respective one of the lines, each monitor unit including means to detect a telephone number dialed onto one of the telephone lines, means to detect an identification number dialed onto said telephone line, means to determine the time duration of a call dialed onto said line, and means to record the real time of occurrence of said call; and a central record unit containing a real time clock, said central record unit further including means to sequentially interrogate said plurality of monitor units, said record unit also including recording means for recording the information contained in said monitor unit.
29. A telephone system as in claim 28 wherein said real time of occurrence is entered into said monitor unit from said real time clock.
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