WO1987006421A1 - Central telephonique avec identification du telephone demandeur - Google Patents

Central telephonique avec identification du telephone demandeur Download PDF

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Publication number
WO1987006421A1
WO1987006421A1 PCT/AU1987/000095 AU8700095W WO8706421A1 WO 1987006421 A1 WO1987006421 A1 WO 1987006421A1 AU 8700095 W AU8700095 W AU 8700095W WO 8706421 A1 WO8706421 A1 WO 8706421A1
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WO
WIPO (PCT)
Prior art keywords
telephone
processor
unit
exchange
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU1987/000095
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English (en)
Inventor
John Coles
Ross Edward Nicholls
John Mcnair Keith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Australian Telecommunications Corp
Australian Telecommunications Commission
Original Assignee
Australian Telecommunications Corp
Australian Telecommunications Commission
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Australian Telecommunications Corp, Australian Telecommunications Commission filed Critical Australian Telecommunications Corp
Publication of WO1987006421A1 publication Critical patent/WO1987006421A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/229—Wire identification arrangements; Number assignment determination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/72—Finding out and indicating number of calling subscriber

Definitions

  • This invention relates to identification of subscriber numbers of telephones or like apparatus in a telephone network be it connected by cable or other means.
  • telephone exchanges employ a main distributing frame to which, on the output side, all of the telephones serviced by the exchange are connected via cable paijrs or "lines".
  • Each terminal of the main distributing frame to which a cable pair is attached is connected to a respective one of a number of further terminals at the other side.
  • the latter terminals are arranged in a serial order whereby each is associated with a particular subscriber's number.
  • the numbers can be readily identified in their sequence.
  • connections are made in a random fashion as dictated by the needs of the exchange and will, of course, vary over time, depending on disconnections and reconnections of telephones.
  • An object of the invention is to provide means useful in automatic verification of subscriber numbers.
  • the invention provides a telephone exchange provided with signal processor, said processor being arranged whereby, on accessing of the processor by addressing an access code thereto from a telephone serviced by the exchange, the processor is effective to automatically determine an identification code for calling said telephone when a particular call is made from that telephone and to transmit, back to the calling telephone, information as to that identification code.
  • the invention provides a unit connectable to a telephone line of the above mentioned telephone exchange to receive information from the aforementioned processor and to display the identification code.
  • Figure 1 is a schematic diagram of a telephone exchange and associated subscriber telephones and lines, and illustrating the manner of operation of the invention
  • FIG. 2 is a block diagram of a signal processor incorporated into the exchange shown in Figure 1;
  • FIGS. 3 to 7 are timing diagrams illustrating line interconnections made during transmission of data from the processor of Figure 2 to subscriber telephones, in accordance with the invention
  • Figure 8 is a diagrammatic perspective view of a unit connectable to a subscribers telephone line or circuit to receive and display information as to the subscribers number, when transmitted thereto from the processor of Figure 2;
  • Figure 9 is a block diagram of the circuitry of the unit of Figure 8; and Figures 10 and 11 join on the line X-X shown therein to form a circuit diagram for the electrical circuitry of the unit of Figure 8.
  • FIG. 1 shows a telephone exchange 10 which, aside from the facility provided by the apparatus of this invention, may be of conventional form, however having the facility for identifying a calling line.
  • Such exchanges are, for example, manufactured by L. M. Ericsson and a description of an exchange of this kind is contained in The Telecommunications Journal of Australia Vol. 27, No. 1 1977, pages 3 to 13.
  • the exchange 10 includes a main distributing frame 12 to which subscriber lines serviced by the exchange 10 are connected, a subscribers line stage 14 connected to the main distributing frame, a signal transfer unit 16 connected to the subscribers line stage 14 and a switching network 18 connected to the signal transfer unit 16.
  • the cable pairs of each of the subscribers lines serviced by the exchange 10 are connected to the main distributing frame 12, and the main distributing frame
  • the subscriber's line stage 14 is controlled whereby, on initiation of a call from a telephone serviced by the exchange 10, the subscribers telephone number, called an "A" number is identified and then transferred to the signal transfer unit 16.
  • Signal transfer unit 16 is effective to store the telephone numbers as transferred thereto from the subscribers line stage 14, and also to store telephone numbers signaled from subscribers serviced by the exchange 10 as identifying other telephones to which it is desired to establish a call.
  • the switching network 18 is effective to effect connections necessary to establish a call from a subscriber serviced by the exchange 10 to another telephone. The switching network thus has numerous outputs to enable switching to the various destinations as necessary.
  • the call is established by transfer back from the switching network 18 and thence out through the subscribers line stage 14, and main distribution frame 12. If the call is to go exteriorly of the exchange, it will be so directed from the switching network 18.
  • the signal transfer unit 16 is in either case usually decoupled from the signal path once the call is established.
  • the signal transfer unit 16 is that part of the exchange 10 in which the "A" number, which is the subscriber telephone identification number, is stored during signalling. This unit also stores the number which has been called, referred to as a "B" number.
  • the exchange 10 includes, in accordance with this invention, a telephone number identifier processor 20.
  • the switching network 18 is effective to provide a connection to the processor 20 whereby the "A" number, identifying the subscriber number from which the call originated, is transferred to the processor 20.
  • this operation is effected when one of a number of different "B" numbers are so addressed, the addressing of different ones of the numbers being used to condition the processor 20 in different ways. In each instance, however, conditioning is effective to cause the processor to transfer data 'identifying the "A" number to one of a number of data retrieval devices.
  • Mode 1 - In this mode, the processor 20 is effective to return a voice announcement identifying the "A" number, through the switching network 18 and subscribers line stage 14 to the main distributing frame 12 and thence back to the originating telephone, as illustrated by reference numeral 22.
  • Mode 2 - In this mode, data is transferred from the processor 20 as last described through the main distributing frame 12 to a switch number identifier (SNI) unit 24 being located at the "A" telephone 22 to enable visual identification of the telephone number of telephone 22.
  • SNI switch number identifier
  • Unit 24 has a suitable visual display apparatus, such as a liquid crystal display capable of displaying the subscriber telephone number on operation of the processor 20 in this mode.
  • Mode 3 In this mode the processor 20 is effective to cause a main distributor frame display device 28 to display the "A" number.
  • Mode 4 In this mode data identifying the "A" number is transferred to a recording device 30 positioned at the main, distributing frame 30.
  • This recording device may for example be a microprocessor or computer.
  • provision may be made, alternatively, for transfer of the data relating to the "A" subscriber's number to a dial-up modem 32 which may be addressed exteriorly of the exchange such as by use of a recording device 26 which device is able to address the telephone exchange 10 via a dial-up modem 38 to the modem 32.
  • Mode 5 In this mode, data is returned from the signal processor 20 as before described to the telephone 22 in such a fashion that the unit 24 can transfer data to a recording device 26, in a fashion recognized by the recording device, to enable it to record information as to the "A" number.
  • the recording device 26 may comprise a computer and may be designed to permit data so entered into the recording device to be transferred back to a central recording station, such as via another line back to the main distributing frame 12.
  • the processor 20 is shown in more detail in Figure 2.
  • This includes a central processor unit (CPU) 42 which is made up of a microprocessor 44, a peripheral interface adaptor 54, a programmable timer module 56, an asynchronous communications interface adaptor 58 and an erasable programmable read-only memory (EPROM) 60.
  • the microprocessor 44, memory 60, timer module 56 and interface adaptor 58 are interconnected, via an address bus 62, a control bus 64 and a data bus 66, with the peripheral interface adaptor 54.
  • the peripheral interface adaptor may suitably comprise a commercial device such as Motorola 6821 and provides 8-bit bi-directional ports to provide an interface between the microprocessor bus and other parts of the circuit shown in Figure 2.
  • the timer module 56 has as its principal function to provide a signal of frequency suitable for operating the adaptor 58.
  • Line 48 consists of three wires from the switching network, of which in use one of which in use a signal indicative of a call from the switching network and the other two being used for information transfer.
  • STU Signal Transfer Unit
  • a multi frequency code signal transmitted by the signal transfer unit 16 is received, decoded by the Multi Frequency Code Receiver (MFCR) 50, and transferred to the CPU 42.
  • MFCR Multi Frequency Code Receiver
  • the CPU 42 operates in accordance with its programme to carry out certain functions after which the CPU directs the Code Sender 70 to return multi frequency code signal to the signal transfer unit 16 via receiver 50 and line 48. This signalling interchange continues until the "A" number is retrieved from the signal transfer unit 16 and placed in the microprocessor 44.
  • the access code determines in which mode the CPU will handle the call.
  • Mode 1 the information signals generated by the processor 42 are transferred to a modem/voice synthesizer circuit 72 including a control circuit 81 coupled to the adaptor 34 for effecting control of the circuit 72 as directed by the CPU 42.
  • the information signals are contained in an annunciation program which is located in the EPROM 60 and is activated depending on that part of the "A" number being returned.
  • Mode 2 The required data signal as stored in the microprocessor 44 is transferred via the adaptor 58 and, a modem 78, forming part of circuit 72, and is thence applied via the amplifier 76 through the unit 46 to the line 48.
  • the data in this case is in the form of serial data which may be capable of being received by the SNI unit 24 to provide a visual display of the "A" number from which the original call originated.
  • Mode 3 In this case the microprocessor unit 44 is effective, via the peripheral interface adaptor 54 to condition a lamp display driver - circuit 80 in driving the display 28 whereby the display 28 displays the number of the calling telephone.
  • the microprocessor 44 is effective to output the information as to the identity of the "A" number via the interface adaptor 58 to a communications port 82 such as type RS 232 included within modem/voice synthesizer circuit 72.
  • Mode 5 information as to the "A" number is again transmitted via the adaptor 58 to the modem 78 for transmission via amplifier 76 and unit 46. In this case, however, the information is outputed in a manner suitable for external recordal at the point from which the enquiring call was made.
  • FIGS 3 to 7 For the sake of this description, it is assumed that the access codes required for accessing the processor 20 in each of its different modes of operation 1 to 5 comprise the numbers 1116, 1114, 1115, 1112 and 1113 respectively, and that the subscriber "A" telephone number is 5513216.
  • the access codes required for accessing the processor 20 in each of its different modes of operation 1 to 5 comprise the numbers 1116, 1114, 1115, 1112 and 1113 respectively, and that the subscriber "A" telephone number is 5513216.
  • FIG. 3 to 7 there is shown, across the upper part thereof, and the main distributing frame 12, subscribers line stage 14, signal transfer unit 16 and switching network 18 of the exchange 10, together with the processor 20. These areshown connected in the last mentioned order across each figure. Therebelow, in each case are shown a number of lines extending transversely across the figure and positioned one below the other.
  • FIG. 3 shows in detail signalling in mode 1.
  • the subscribers number in this case 5513216, being the "A" number as aforedescribed, is detected and a signal transmited to the signal transfer unit 16.
  • the "A" number is stored in the signal transfer unit 16.
  • signal corresponding to this is passed through the main distributing frame 12 and the subscribers line stage 14 to the signal transfer unit 16.
  • the unit 16 is then effective to pass signal indicating number 1116 to the switching network 18 and the switching network 18 is responsive to transfer the signal indicative of the last digit "6" to the processor 20.
  • the processor 20 recognizes the code signal 6 as a request for voice annunciation of the telephone number and then is effective to retrieve the number from the signal transfer unit 16 by signalling through the switching network 18. Responsive to this signalling, the unit 16 transfers a code signal corresponding to the "A" number, 5513216 in the case, through the switching network 18 to this processor 20. Then, the processor 20 is effective to generate a signal in which, as aforedescribed, is effective to cause speech synthesizer 74 to generate a speech signal which is in the form of a voice announcement of the "A" number corresponding to telephone 22. This signal is then passed from the processor 20 through the switching network 18, bypassing signal transfer unit 16, through subscribers line stage 14 and main distributing frame 12 back to the telephone 22. At the end of transmission the telephone hand set is replaced and the exchange line from telephone 22 is released.
  • (Mode 2) the telephone 22 is replaced by the unit 24 as aforedescribed, being of a kind having a liquid crystal display 32.
  • the unit 24 is operated by pressing a start button which loops the line to the exchange 10 to provide dial tone from the signal transfer unit to the unit 24 if the line is free.
  • the establishment of the connection from the unit 24 is noted by the subscriber line stage 14 which transmits the corresponding "A" number 5513216 to the signal transfer unit 16 for storage therein.
  • the unit is operated to signal the code 1114 which is passed from the main distributing frame 12 through the subscribers line stage 14 to the signal transfer unit 16 and thence to the switching network 18 the last digit " 4 " is then transferred in appropriately encoded signal form to the processor 20.
  • the processor 20 thence directs a signal to the signal transfer unit 16 requesting the "A" number and the unit 16 responds by sending the number to the processor 20.
  • the processor 20 is effective to generate a signal via the interface adaptor 58 and modem 78 to transmit a configuring sequence back through the switching network 18, bypassing signal transfer unit 16, through subscribers line stage 14 and main distributing frame 12 to the unit 24.
  • the display 32 such that display of it progressively shows the corresponding numbers until, on completion of the transmission of the seven digits comprising the "A" number in question, the whole of the number 5513216 is displayed. Then, the processor 20 transmits a release signal which is received by the unit 24 and the line from the unit 24 is then released.
  • Figure 6 illustrates, the operation of the processor 20 to operate the recording device 30 located for example, adjacent the main distributing frame 12 in the exchange 10.
  • a suitable dialler 34 is employed to loop the subscribers line at the input side of the main distributing frame 12 so that dial tone appears at the line.
  • the dialler is employed to dial the digits 1112, signals representating this passing through the main frame 12 and subscriber line stage 14 to the signal transfer unit 16.
  • the dialled signal is then passed from the signal transfer unit 16 to the switching network 18 and the last digit, 2 in this case, is transferred to the processor 20.
  • the processor 20 then responds by requesting the "A" number from the signal transfer unit 16 and by transmitting to the recording device 30 a carriage return signal to ready the device for data receipt.
  • signals representing digits of the "A" number are read from the signal transfer unit 16 by the signal processor 20 and transmitted to the recording device 30 via the communications port 82.
  • the processor 20 sends carriage return and line feed signals to the device 30, followed by a release signal which is addressed to the signal transfer unit 16 to effect release of the line to which the device 30 is coupled.
  • a portable unit 24 is shown in Figure 8 as having a casing 86 within which the electric circuit shown in Figure 9 is housed.
  • This circuit includes a line testing and digit sending section 88, a line supervisory circuit 90, a modem/UART/LCM section 92, and a port 94.
  • the line supervisory circuit 90 is connected to the cable pair of the line which is to be tested, via terminals 98 on the exterior of the casing 86.
  • the line testing and digit sending section 88 is effective, on initiation of operation by pressing a start button 100 on casing 86, to test the line and, if available for information transfer, to initiate a call to the processor 20.
  • Returned information from the line is passed via the circuit 90 to the section 92 which is effective to display, on a liquid crystal display 102 on casing 86, the telephone number as identified by information from the processor 20 passed on the line to the circuit 90.
  • This data is also passed to the port 94 so that the data may be transferred, via an output jack 104 on casing 86 to suitable apparatus such as a computer.
  • the casing In addition to the components aforementioned as being positioned on the casing 86, the casing also has an on/off switch 106 thereon and a lamp 108 to enable determination of a low voltage condition of the electric supply for the unit 24, as well as a lamp 110 which is illuminated to indicate when a line to which the unit is attached is free for dialling.
  • the unit 24 may be of relatively small size to enable it to be transported readily from site to site. The unit 24 may also be small enough to fit in the casing of another unit.
  • the circuit for the unit 24 is shown in more detail in Figures 10 and 11.
  • the line supervisory circuit 90 shown in Figure 10 is shown as including a full wave rectifier 114 coupled to terminals 98 whereby to be positioned across the cable pair of a telephone line 96 when the unit 24 is in use.
  • Output from the rectifier 114 is passed to an optical coupler 116, and in the event that the line should be free, this output is effective to switch a Schmitt trigger NAND gate 118 to illuminate lamp 110.
  • the unit 24 presents a greater than 68000 ohm impedance across the line, this being constituted, essentially, by a correspondingly valued resistor 120 connected via a Zener diode 122 across the output of the rectifier 114.
  • the optical coupler 116 may be of conventional form comprising, as shown, a light emitting diode 124 connected across a Zener diode 122 and a phototransistor 126.
  • the transistor has its collector connected to positive supply via a resistor 128 and to the input of NAND gate 118.
  • the emitter of the transistor 126 is connected to ground.
  • the lamp 110 is in this instance in the form of a light emitting diode connected to ground, at the cathode thereof, and having the anode thereof connected to the output of the NAND gate 118 via a resistor 130.
  • the line testing and digit sending section 88 of the circuit includes the start button 100 which when pressed resets the whole of the circuit of Figures 10 and 11.
  • the switch has one side connected to ground and the other connected to positive supply via a resistor 132.
  • the last mentioned side of start button 100 is connected to a flip-flop 134 which, on release of the start button 100, is conditioned so that the Q output goes low in the event that the unit is connected to a free line.
  • the counter 136 begins counting and, in the event that the line remains free for 2 seconds, a second flip-flop 138 is operated.
  • the Q output of flip-flop 138 goes low on such operation and is effective to maintain the counter 136 in an active condition and to place the CRQ terminal of a pulser 140 low whereby to cause the pulser 140 to loop the line 96 by causing the ⁇ PL output of the pulser 140 to go high.
  • This output is applied via an AND gate 142 to an optical coupler 144 whereby to turn on a transistor 146 connected across the output of the coupler 144, the transistor having its emitter connected to the negative output of rectifier 114 and its collector connected to a positive output.
  • Transistor 146 has its base coupled to the emitter of a phototransistor 148 included in optical coupler 144 and its collector coupled to the collector of transistor 148.
  • the emitter and base of the transistor 146 are interconnected by a resistor 150.
  • a Zener diode 152 is connected across the emitter and collector of transistor 146.
  • Counter 164 is shown as comprising a commercial device type 14017 and pulser 140 a commercial device 14409.
  • Flip-flops 134 and 138 are shown on comprising commercial devices type 14013 and counter 136 a commercial device type 14521.
  • the optical coupler 144 includes a light emitting diode 154 which is connected to the output of AND gate 142 and to ground via resistor 156.
  • the outputs Q0 to Q9 of counter 164 are coupled via diodes 166 to the terminals D0..D3 of pulser 140 so as to comprise a dialling field generally designated by reference numeral 168. Switching of the states of the D0..D3 terminals of pulser 140 is effected between high and low conditions by virtue of resistors 170 connected thereto.
  • the dialling field 168 as constituted by the diodes
  • any particular one of the inputs DO..D3 of pulsar 140 is required to be high, in accordance with the binary coding, there will be a respective diode 166 coupled thereto. If, in accordance with desired coding, the digit as represented in binary form requires one of the terminals D0..D3 to be in a low condition there will be no corresponding diode 166 coupled thereto.
  • the pulser 140 receives a pulse from counter 136 via AND gate 158, NOR GATE 160 and NOT gate 162. This is effective to strobe the first digit to be dialled at the inputs D0....D3 to the pulser 140. That is to say, at this time these inputs are conditioned to represent in binary coding the first digit to be dialled.
  • This operation causes the OPL output of the pulser 140 to be pulsed, so that, by a signal applied via gate 142 and optical coupler 144, the transistor 146 is switched on and off to transmit dial pulses to the line.
  • the DRO terminal of pulser 140 is conditioned to a high level to step a counter 164.
  • the Q0 output of counter 164 is brought to a low condition, and the Q1 thereof output goes to a high condition after stepping of the counter 164.
  • the Q0 output of counter 164 in going low, effectively blocks off the parts of the circuit which effect strobing, to prevent the counter 136 from interfering with subsequent strobing.
  • the DRO output of counter 140 goes low to strobe in the next digit applied by the Q1 output of counter 164. The next digit is thus transmitted to the line in the same fashion as the first digit and further interaction between the pulser and counter 164 continues until a stop condition is reached, the latter condition being established by switching of output Q4 of the counter 164 to gate 160.
  • the enabling of the Q4 output of counter 164 prevents further strobing of the pulser 140 by holding the ST terminal thereof low via the aforementioned gates 160 and 162.
  • the enabling of the Q4 output is also effective to operate the transistor 146 to release the original loop line provided by the connection between gate 142 and coupling 144.
  • a transformer 172 has its primary winding 174 connected across the line 96.
  • a NOT gate 176 is connected through a Schmitt inverter gate 178 to the Q4 output of counter 164.
  • Gate 178 also receives, via a NOT gate 180, output from the DRO terminal of counter 140.
  • the NOT gate 176 is effective to connect the transformer 172 across the loop line via an optical coupler 184 and transistor 186.
  • the output from the gate 176 is coupled to a light emitting diode 188 which is connected to ground supply via a resistor 190.
  • Coupler 184 also includes a transistor 192 having its emitter connected to the base of transistor 186 and, its collector connected to the collector of transistor 186.
  • Transistor 186 has its base and emitter interconnected via resistor 194.
  • Data signals received on the incoming line 96, and containing information as well as the identified "A" number are received by the transformer 172.
  • the secondary of the transformer is connected, preferably via a capacitor 198, to the RC input of a modem 196 (in this case shown as a commercial type S3530).
  • the output from the transformer is also connected to ground via a resistor 199 and to parallel, relatively reversely oriented, diodes 200, 201.
  • the signals received by the modem are directed to a universal asynchronous receiver transmitter (UART) 202, shown as comprising a commercial device type AY-3-1015D GI. This signal is received at the RI terminal of the UART 202 and is converted by the UART to appear at the parallel outputs RRO...RR7 thereof.
  • UART universal asynchronous receiver transmitter
  • the output from the UART 202 is applied by a data bus to a liquid crystal module (LCM) 214 for display the received number.
  • the LCM 214 is shown as comprising a commercial device type DMC-16106B-A optrex.
  • the DR (data received) terminal thereof goes high. This causes the E terminal of the LCM 214 to transfer the data on the data bus into the LCM whereby to update the display.
  • Each applied code signal at the UART is checked for parity error, framing error and over-run error and, on detection of an error, the flip-flop 138 is reset, via OR gates 204, 206 and 208 to release the line connection.
  • the DR terminal of UART 202 is also connected, via an inverter 212 to the DRB terminal of the UART to reset the UART in readiness for the next code.
  • each code representing a digit of the "A" number is received on the line 96 from the SNI processor 20, it is stored in the LCM 214 to be displayed on its LCD and the UART 202 reset ready to receive the next code.
  • a release signal the flip-flop 138 is reset via RR6 and RR7 of UART 202 going high, and GATE 211, and OR gates 206, 208 to release the line connection.
  • the data sent by the SNI processor comprises configuring data followed by the identified "A" number.
  • the configuring data clears the liquid crystal display 102 and positions a cursor in readiness for the reception of the identified switch number.
  • the sequencing and timing of operations within the circuitry for the unit 24 is performed under control of the counter 136.
  • the counter 136 has a resistor-capacitor network comprised of resistors 218, 220 and a capacitor 222, coupled to the pins 4, 6, 7 and 9 shown, and these are arranged to provide that the counter steps internally at a rate of one second. This is effected, within the timer to provide three timing periods, a two second period to supervise the aforementioned free test where testing to determine whether the line is free is effected, the two second period before commencing of dialling and an overall time period of 16 seconds for completion of all functions.
  • the flip-flop 138 is reset and the whole of the circuitry is reset to normal.
  • the jack 104 is coupled to the output of a level converting integrated circuit 222 (in this case a commercial type 1488) .
  • the jack is also coupled to the dialling field 168.
  • contacts 224 associated with the jack are operated in a fashion so as to modify the dialling field 168 so that on sending out of a dialled number by the unit 24, as previously described, different access code is directed to the processor 20 than is otherwise the case. In this instance, a different programme is called up in the processor 20.
  • the manner of outputting of data to the unit 24 is in this case generally similar to that described above, with the exception that the data input to the UART 202 is taken to the integrated circuit 222 and thence fed to the recording jack in a form suitable for actuation of the recording device. Also, no initialising data need be sent in this case.
  • the unit 24 may be used in either of two modes:
  • the line 96 is connected to the rectifier 114 whereupon, if the line is free, the LED 110 is illuminated.
  • the start button 100 is actuated whereupon the LED 110 is extinguished, save for flickering on and off to indicate that dialling is in progress.
  • the switch number After a few seconds, following transmission of the outgoing access signal to the processor 20 and return of the required information from the processor, the switch number will be displayed on the LCD 102 and will remain there until overwritten by a further identification on another number or the power is turned off.
  • the unit will be disconnected automatically from the line 96 and only those digits received will be displayed on the LCD 102. This disconnection is effected by operation of the UART 202 as previously described.
  • the recording device is plugged into the jack 104.
  • the line terminals of the unit are connected to the line 96.
  • the start switch 100 is actuated whereupon operation is similar to that described above.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

Un central téléphonique (10) comprend un processeur de signaux (20) permettant de déterminer le code d'identification des téléphones correspondants reliés au central (10). Le processeur (20) est conçu de telle sorte qu'on peut y accéder en lui adressant un code d'accès depuis un téléphone desservi par le central. Le processeur (20) sert à déterminer automatiquement le code d'identification permettant d'appeler un téléphone correspondant lors d'un appel particulier depuis ledit téléphone. Le processeur (20) transmet également en retour au téléphone demandeur les informations concernant le code d'identification.
PCT/AU1987/000095 1986-04-08 1987-04-08 Central telephonique avec identification du telephone demandeur Ceased WO1987006421A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPH5375 1986-04-08
AUPH537586 1986-04-08

Publications (1)

Publication Number Publication Date
WO1987006421A1 true WO1987006421A1 (fr) 1987-10-22

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PCT/AU1987/000095 Ceased WO1987006421A1 (fr) 1986-04-08 1987-04-08 Central telephonique avec identification du telephone demandeur

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Cited By (10)

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US5063588A (en) * 1988-11-21 1991-11-05 Motorola, Inc. Communication system providing automatic identification of calling parties
FR2727271A1 (fr) * 1994-11-18 1996-05-24 Harris Corp Dispositif et procede de test de rappel telephonique
WO1997010666A1 (fr) * 1995-09-12 1997-03-20 British Telecommunications Public Limited Company Essai de lignes d'un reseau de telecommunications
EP0792057A1 (fr) * 1996-02-23 1997-08-27 Harris Corporation Dispositif téléphonique de test par retour d'appel et méthode
US6002746A (en) * 1997-04-16 1999-12-14 British Telecommunications Public Limited Company Line testing in a telecommunications network
GB2346290A (en) * 1998-12-24 2000-08-02 Samsung Electronics Co Ltd Method and apparatus for providing information services in characters through ISDN
FR2797545A1 (fr) * 1999-08-12 2001-02-16 Jocelyn Bertignon Procede de reconnaissance des caracteristiques de lignes telephoniques et routeur pour sa mise en oeuvre
US6385299B1 (en) 1995-09-12 2002-05-07 British Telecommunications Public Limited Company Line testing in a telecommunications network
EP1189416A3 (fr) * 2000-09-19 2003-06-04 Deutsche Telekom AG Méthode et système pour la requête du numéro d'abonné associé avec la borne de connection
DE19948098B4 (de) * 1999-10-06 2006-01-26 Siemens Ag ISDN-Gerät mit "Plug-and-Play"-Funktion, Verfahren zum Abspeichern einer "Multiple Subscriber Number" in dem ISDN-Gerät und Verwendung eines ISDN-Geräts zur Durchführung dieses Verfahrens

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Cited By (13)

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US5063588A (en) * 1988-11-21 1991-11-05 Motorola, Inc. Communication system providing automatic identification of calling parties
FR2727271A1 (fr) * 1994-11-18 1996-05-24 Harris Corp Dispositif et procede de test de rappel telephonique
US6169783B1 (en) 1995-09-12 2001-01-02 British Telecommunicaitons Public Limited Company Line testing in a telecommunications network
WO1997010666A1 (fr) * 1995-09-12 1997-03-20 British Telecommunications Public Limited Company Essai de lignes d'un reseau de telecommunications
US6385299B1 (en) 1995-09-12 2002-05-07 British Telecommunications Public Limited Company Line testing in a telecommunications network
EP0792057A1 (fr) * 1996-02-23 1997-08-27 Harris Corporation Dispositif téléphonique de test par retour d'appel et méthode
US6002746A (en) * 1997-04-16 1999-12-14 British Telecommunications Public Limited Company Line testing in a telecommunications network
GB2346290A (en) * 1998-12-24 2000-08-02 Samsung Electronics Co Ltd Method and apparatus for providing information services in characters through ISDN
GB2346290B (en) * 1998-12-24 2001-06-27 Samsung Electronics Co Ltd Method and apparatus for providing information services in characters through ISDN
FR2797545A1 (fr) * 1999-08-12 2001-02-16 Jocelyn Bertignon Procede de reconnaissance des caracteristiques de lignes telephoniques et routeur pour sa mise en oeuvre
WO2001013608A1 (fr) * 1999-08-12 2001-02-22 Jocelyn Bertignon Procede de reconnaissance des caracteristiques de lignes telephoniques
DE19948098B4 (de) * 1999-10-06 2006-01-26 Siemens Ag ISDN-Gerät mit "Plug-and-Play"-Funktion, Verfahren zum Abspeichern einer "Multiple Subscriber Number" in dem ISDN-Gerät und Verwendung eines ISDN-Geräts zur Durchführung dieses Verfahrens
EP1189416A3 (fr) * 2000-09-19 2003-06-04 Deutsche Telekom AG Méthode et système pour la requête du numéro d'abonné associé avec la borne de connection

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