CN1004603B - Unmanned computerized communication system - Google Patents
Unmanned computerized communication system Download PDFInfo
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- CN1004603B CN1004603B CN88100244.5A CN88100244A CN1004603B CN 1004603 B CN1004603 B CN 1004603B CN 88100244 A CN88100244 A CN 88100244A CN 1004603 B CN1004603 B CN 1004603B
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Abstract
The present invention relates to an unattended communication system for a computer. Each of both communication parties has a computer, a modem and a telephone which are connected with a telephone exchange network by a transmit-receive switch. The present invention is characterized in that both communication terminals are respectively provided with an unattended communication controller comprising a detection circuit for starting instructions and a power supply connector, and the computers are connected with peripheral equipment of a communication controller, the modems, etc. by parallel interface cards. The present invention can form an unattended computer communication network without influencing a conversation function, and thus, the present invention saves the manpower of a receiving terminal so that the communication time is not restricted.
Description
The present invention relates to carry out system for transmitting by VF telephone circuit between the fixed station, relate in particular to a kind of unmanned computerized communication system.
Existing computer communication system is when implementing communication, and making a start must someone operation of starting shooting, and receiving end also must Attended mode be waited for and start is operated.The both wastes of manpower of this mode when wasting the computer machine again, are used inconvenient.
The objective of the invention is to adopt the method for remote control, provide a kind of under the situation of the unmanned start operation of receiving end, can open the communication system of the other side's computer, i.e. unmanned computerized communication system automatically by making a start.So-called " unattended operation ", the receiving end that is meant communication system by the control of making a start, is carried out the automatic reception and the processing of message under the situation of unmanned start operation.
Adopt computer to carry out duplex simultaneous two-way communication, communicating pair all disposes computer 1, modulator-demodulator 2 and telephone set 7, is that outside line 11 connects by transmit-receive switch K1 with switched telephone network.Computer 1 is the terminal equipment of communication in native system, again control is implemented in communication.Modulator-demodulator 2 is that the digital signal that computer 1 sends is modulated, so that transmit by telephone wire.In native system, it also will shoulder the transmission of the command of execution, and when transmit-receive switch K1 placed " sending out " position, it and outside line 11 directly linked.When transmit-receive switch K1 places " receipts " when position, it by and normal opened contact J1, the normal opened contact J of relay J of the relay J that connects
1Link with outside line 11.Computer 1 has sent the command of execution by 126 lines (the channel switch control line in the CCITT suggestion) of parallel interface card 5 control modulator-demodulators 2.
Switched telephone network is an outside line 11, and as the medium of communication, it can be automatic switched line, artificial switched line or special telephone line.
All can carry out the unattended communication between any two users of each user in the net.
Except that above-mentioned parts, principal character of the present invention is that the communication two ends are separately installed with the unattended communication's controller 4 that has comprised command of execution testing circuit 8, power source adaptor 6, and in the general purpose I/O expansion slot of computer 1, inserting parallel interface card 5, computer 1 connects with external equipments such as communication controler 4 and modulator-demodulators 2 by parallel interface card 5.
This system need not to take dedicated communication line, utilizes existing switched telephone network, just can form the unattended operation computer communication network under the prerequisite that does not influence call function.All can carry out the unattended communication between any two users of each user in the net.Whole communication process need not the other side personnel and cooperates, and can save the manpower of receiving end, call duration time is not restricted, for the free time that makes full use of telephone line provides condition.Make a start needn't be in advance and receiving end get in touch, just can communicate, to improve the economical, societal benefits of telephone line in free time at night.
The present invention has the following drawings:
Fig. 1 is the block diagram (frame of broken lines is a communication controler 4) of unmanned computerized communication system one end;
Fig. 2 is the block diagram of power source adaptor 6;
Fig. 3 is the block diagram of parallel interface card 5;
Fig. 4 has been the embodiment block diagram of command of execution testing circuit 8.
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Communication controler 4 of the present invention has the ringing-current detection with answering, by ringing-current detection and being connected in series the branch road that answering circuit 10 and relay J are formed except that comprising, also have as principal character of the present invention, form the serial connection branch road that circuit 9 and relay J are formed by playing a command of execution testing circuit 8, control signal, and form the power source adaptor 6 of circuit 9 control by control signal, to realize unattended communication's function.
Communication controler 4 is multi-terminal networks.A is terminated at transmit-receive switch K1's " sending out " position, also is connected to outside line place of modulator-demodulator 2; B is terminated at transmit-receive switch K1's " receipts " position, and it is that ringing-current detects the input with answering circuit 10, and ringing-current detects the relay J that exports to answering circuit 10; C is terminated at telephone set 7, and it has been the input of command of execution testing circuit 8, by the normally closed contact J of relay J
2Be connected to b end, i.e. transmit-receive switch K1 " receipts " position, the output that plays command of execution testing circuit 8 through control signal formation circuit 9 to relay J; E is terminated at parallel interface card 5, is another input that control signal forms circuit 9, and input by the disconnecting signal that parallel interface card 5 sends, discharges relay J by computer 1, thereby control power source adaptor 6 turn-offs the power supply of all devices; The g end also is connected to parallel interface card 5, is another output that control signal forms circuit 9, and the output interrupt signal to computer 1, makes computer 1 be in the AM/BAM working method by parallel interface card 5.Another output i of control signal formation circuit 9 is connected to 6, the three outputs of power source adaptor and is connected to relay J; H holds external dry cell 13, in be connected to D.C. regulated power supply 12, D.C. regulated power supply 12 external direct current power supplies+E, and through the normal opened contact J of relay J
3Connect with power source adaptor 6.
The course of work of communication controler 4 is as follows:
Transmit-receive switch K
1Usually place " receipts " position.The bell signal of making a start enters ringing-current by outside line 11 through the b end and detects and answering circuit 10, after the time-delay several seconds, makes the relay J adhesive, its normal opened contact J
1Closed, modulator-demodulator 2 is connected to outside line 11 through b, and provide answer signal, if during this period of time, the command of execution (generally like this under the signal intelligence) that receiving makes a start comes, the relay J adhesive, at this moment, even relay J discharges, modulator-demodulator 2 still can by with relay J normal opened contact J
1The relay J normal opened contact J of parallel connection
1Keep being connected on the outside line 11.If in the ring several seconds, someone mentions telephone set 7, just modulator-demodulator 2 is connected on the outside line 11 in advance by robbing connection circuit (accompanying drawing does not draw), for non-unattended normal talking, because playing command of execution testing circuit 8 detects less than playing the command of execution, modulator-demodulator 2 automatically disconnected with telephone set 7 after some seconds, and modulator-demodulator 2 is in the pass electricity condition always, so can not influence normal communication.
The command of execution that the present invention adopts is a double-audio signal, and its order is to send out 2 seconds f1 signals earlier, and then sends out 2 seconds f2 signals again.This command of execution can strictly be distinguished with speech or other interference signal mutually, to avoid the empty starting of system.Detected the command of execution in case play command of execution testing circuit 8,, formed circuit 9 output control signals by control signal and make the relay J adhesive, its normal opened contact J through identification and shaping
1Closure, whether adhesive all links with outside line 11 no matter make modulator-demodulator 2 relay J; Normally closed contact J
2Disconnection is with telephone set 7 and play command of execution testing circuit 8 and outside line 11 disconnections, prevents that phone from disturbing and rising the 8 empty startings of command of execution testing circuit; D.C. regulated power supply 12 provides the self-insurance electric current for relay J.Control signal forms circuit 9 also provides a signal to make A.C. contactor J adhesive through the i end, and AC power 3 is through the normally opened contact J of A.C. contactor J
1(when manually opening computer 1, Closing Switch K
2) input of incoming transport pressurizer 14, pass through the normal opened contact Jy of time-delay relay Jy again
1Be connected to computer 1 and modulator-demodulator 2(time-delay length and be decided by that AC voltage regulator 14 reaches the burning voltage required time), at this moment, system enters start-up course, after machine 1 self check to be calculated, control signal forms circuit 9 and interrupt signal (index signal) is provided for computer 1 through parallel interface card 5, makes computer 1 enter communications status automatically.
The computer 1 of message receiving end might be in open state, is for example doing and irrelevant copy editor or the working procedure of communicating by letter, and at this moment makes a start and will communicate by letter with it, also will put through phone earlier, and circuit is connected, and has sent the command of execution then.After communication controler 4 has detected the command of execution, just the power connection of modulator-demodulator 2 is (in running order because of computer 1, obviously AC voltage regulator 14 and miscellaneous equipment are work, need not to connect again), and send interrupt signal for computer 1, the command of execution that rises that 1 pair in computer is made a start is answered, and illustrates that local terminal equipment is ready to, is in the AM/BAM working method then.
Another feature of the present invention is to insert parallel interface card 5 in general purpose I/O expansion slot at computer 1, and computer 1 connects with external equipments such as communication controler 4 and modulator-demodulators 2 by it.The function of parallel interface card 5 is to give computer 1 with the state transfer of communication controler 4, and the control command with computer 1 is sent to external equipment again.It is made up of decoding circuit 15, parallel interface chip 16 and buffer circuit 17.
Decoding circuit 15 is terminated at the address wire of I/O expansion slot through n, its output is connected to the address strobe end of parallel interface chip 16, and the data wire of expansion slot inserts the address strobe end of parallel interface chip 16, and the data wire of expansion slot is connected to the data terminal of parallel interface chip 16.The output of parallel interface chip 16 is connected to buffer circuit 17, is connected to e, the g end that control signal forms circuit 9 respectively by buffer circuit 17, and buffer circuit 17 is terminated at modulator-demodulator 2 through m.
When computer 1 input interrupt signal or output disconnecting signal, at first send an address to give decoding circuit 15, gating parallel interface chip 16 is then by data/address bus and parallel interface card 5 swap datas, by buffer circuit 17 input and output.The effect of buffer circuit 17 is to isolate and level match in order to solve ground wire.
The present invention is the duplex simultaneous two-way communication system.Folk prescription is as follows to communication process: when certain user (promptly making a start) has message will send to another user (being receiving end), at first put through phone by switch or human relay working, in a single day receiving end communication controler 4 receives the starting command of making a start, just with the power supply opening of computer 1 equipment such as grade, make computer 1 enter communications status automatically, and give transmission one repeat back of making a start, illustrate that local terminal equipment is ready to.The computer 1 of making a start around here is in wait state always, waits for the repeat back of receiving end.Make a start receive repeat back after, enter formal communication process, the beginning message data transmission.If in official hour, do not receive the repeat back of receiving end, just think and do not detected the command of execution, can initiate the command of execution again, also do not receive repeat back until the 3rd time, show that circuit or equipment break down, and withdraw from communications status.When message transmissions, every transmission one frame message of making a start is just waited for and " approval " signal of receiving end is transmitted next frame again.If what receive is " denying " signal, show that former frame is wrong, just retransmit this frame.After message transmitted and finishes, making a start provided an END instruction, after receiving end is received END instruction, provided an approval repeat back, as giving the message receipt of making a start, withdrawed from communications status, and whole system is replied initial state.If receiving end after sending repeat back, is not received the message of making a start in official hour, show the empty starting of equipment, can automatically device power supply (DPS) be cut off.System adopts error-control technique (ARQ) that the message that transmits is carried out error control.After treating that message correctly transmits, receiving end is again automatically with the dump of each equipment, the system restoration initial state.
The message that is received deposits on the one hand the disk of computer 1 in, on the other hand also can printout on printer, and this can be by making a start according to security requirements, decided by the control word of header.The message that deposits in the disk needs just can read by secret password, to meet the secure communication requirement.
Embodiment:
Modulator-demodulator 2 is the V13021 type, and its data mode is the asynchronous serial binary system.
Play command of execution testing circuit and adopt the low-frequency amplifier circuit 18 of integrated composition of double operational and the shaping circuit 21 of passive bandpass filters 19,20 and schmidt door formation.
Claims (4)
1, a kind of unmanned computerized communication system, adopt the duplex communication mode, communicating pair all disposes computer 1, modulator-demodulator 2 and telephone set 7, is that outside line 11 connects by transmit-receive switch K1 with switched telephone network, the two ends that it is characterized in that communicating by letter are separately installed with and have comprised command of execution testing circuit 8, unattended communication's controller 4 of the power source adaptor 6 of the on/off of control computer 1 and modulator-demodulator 2, and in the general purpose I/O expansion slot of computer 1, inserting parallel interface card 5, computer 1 connects with external equipments such as communication controler 4 and modulator-demodulators 2 by parallel interface card 5.
1.1 communication controler 4 detects and being connected in series the branch road that answering circuit 10 and relay J are formed except that comprising by electric bell stream, also have by playing command of execution testing circuit 8, control signal forms the serial connection branch road of circuit 9 and relay J composition and the power source adaptor 6 that is formed circuit 9 controls by control signal, it is a multi-terminal network, a be terminated at transmit-receive switch K1's " sending out " position, also be connected to outside line place of modulator-demodulator 2, b be terminated at transmit-receive switch K1's " receipts " position, it is the input of ringing-current detection and answering circuit 10, ringing-current detects the relay J that exports to answering circuit 10, c is terminated at telephone set 7, it has been the input of command of execution testing circuit 8, by the normally closed contact J of relay J
2Be connected to the b end, it is " receipts " position of transmit-receive switch K1, the output that plays command of execution testing circuit 8 forms circuit 9 to relay J through control signal, e is terminated at parallel interface card 5, it is another input that control signal forms circuit 9, the g end also is connected to parallel interface card 5, it is the output that control signal forms circuit 9, another output i that control signal forms circuit 9 is connected to power source adaptor 6, the 3rd output is connected to relay J, and h holds external dry cell 13, in be connected to D.C. regulated power supply 12, D.C. regulated power supply 12 external direct current power supplies+E, and through the normal opened contact J of relay J
3Connect with power source adaptor 6;
1.2 power source adaptor 6 is made up of A.C. contactor J, time-delay relay Jy, K switch 2 and AC voltage regulator 14, it also is a multi-terminal network, and input K is connected to AC power 3, and output L is through the normal opened contact J of relay J
3Be connected to the input of the D.C. regulated power supply 12 of communication controler 4, the L end also is the input of AC voltage regulator 14, AC power 3 is through the K end two-terminal network in parallel by being made up of the normal opened contact J1 of relay J and K switch 2, be terminated at D.C. regulated power supply 12 through L again, also be connected to AC voltage regulator 14, output j is the power input of computer 1 and modulator-demodulator 2, AC power 3 is connected to computer 1 and modulator-demodulator 2 through the normal opened contact Jy1 of AC voltage regulator 14 by time-delay relay Jy, input i is connected to relay J, and it is the output that control signal forms circuit 9;
1.3 parallel interface card 5 is made up of decoding circuit 15, parallel interface chip 16 and buffer circuit 17, decoding circuit 15 is terminated at the address wire of I/O expansion slot through n, its output is connected to the address strobe end of parallel interface chip 16, and the data wire of expansion slot inserts the data terminal of parallel interface chip 16, the output of parallel interface chip 16 is connected to buffer circuit 17, be connected to e, the g end that control signal forms circuit 9 respectively by buffer circuit 17, buffer circuit 17 is terminated at modulator-demodulator 2 through m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88100244.5A CN1004603B (en) | 1988-01-13 | 1988-01-13 | Unmanned computerized communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88100244.5A CN1004603B (en) | 1988-01-13 | 1988-01-13 | Unmanned computerized communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88100244A CN88100244A (en) | 1988-07-27 |
| CN1004603B true CN1004603B (en) | 1989-06-21 |
Family
ID=4831262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88100244.5A Expired CN1004603B (en) | 1988-01-13 | 1988-01-13 | Unmanned computerized communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004603B (en) |
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1988
- 1988-01-13 CN CN88100244.5A patent/CN1004603B/en not_active Expired
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| Publication number | Publication date |
|---|---|
| CN88100244A (en) | 1988-07-27 |
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