CN2404281Y - Non-emergency telephone shield - Google Patents
Non-emergency telephone shield Download PDFInfo
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- CN2404281Y CN2404281Y CN 00219165 CN00219165U CN2404281Y CN 2404281 Y CN2404281 Y CN 2404281Y CN 00219165 CN00219165 CN 00219165 CN 00219165 U CN00219165 U CN 00219165U CN 2404281 Y CN2404281 Y CN 2404281Y
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Abstract
The utility model belongs to an accessory device which is used for a telephone. An output end of a passage of an interface circuit of the device and a ringing current detecting signal output end are connected with a controlling and managing circuit. A keystroke signal output end of the controlling and managing circuit is connected with a telephone keystroke signal detecting circuit, and a keystroke signal data output end of the telephone keystroke signal detecting circuit is connected with the controlling and managing circuit. A control signal output end of the controlling and managing circuit is respectively connected with the keystroke signal detecting circuit, a cipher storing circuit and an incoming call prompting circuit, and a data end of the cipher storing circuit is connected with the controlling and managing circuit. When the utility model is used, a calling party knows whether a called party answers a non-urgent telephone or not, and the telephone of the called party can shield the incoming call of an unfamiliar person.
Description
The utility model relates to a kind of auxiliary equipment that is used for telephone set.
People in using phone when preventing rest or when dealing with urgent work telephone bell interference, often pulling up the switch that telephone wire maybe will be connected in the telephone line disconnects, after rest finishes or after having dealt with urgent work, connect phone again and make phone be in holding state.But emergency call can not be called in pulling up telephone wire or switch off period.And caller identification device in the market can make the callee whether be familiar with determining whether answer according to the shown telephone number of caller identification device, and the caller identification device that has also has the function of some designated telephone of shielding.But if the person of being familiar with uses ignorant other making call phone of callee, the callee often thinks the person's of being unfamiliar with phone and does not go to answer or this phone conductively-closed, if and harassing and wrecking person's replacing phone is dialed harassing call, the caller identification device can not be shielded effectively, and the caller identification device can not shield the unexpected called telephone of throwing into because of dialling a wrong number.Therefore, the callee can not really avoid being bothered by non-emergent phone; During the caller dials phone, do not know that the callee is whether just busy yet or having a rest.
The purpose of this utility model is, can make the calling party know whether the callee connects non-emergent phone and make the device of the non-person's of being familiar with of called phone maskable incoming call when a kind of the use is provided.
The technical scheme that realizes the utility model purpose is (referring to Fig. 1), and this device has interface circuit (2), control and management circuit (3) and incoming call prompting circuit (8); The input of interface circuit (2) can link to each other with phone inlet wire port; Its design feature is: this device also has telephone key-press signal deteching circuit (4) and password storage circuit (71); The channel output end of interface circuit (2) connects the passage input of control and management circuit (3), the ringing-current detecting signal input of the ringing-current detecting signal output termination control and management circuit (3) of interface circuit (2); The answer the call push button signalling input of push button signalling testing circuit (4) of the push button signalling output of control and management circuit (3), the push button signalling data output end of telephone key-press signal deteching circuit (4) connects control and management circuit (3) push button signalling data input pin; The corresponding port of the control signal output ends of control and management circuit (3) links to each other with telephone key-press signal deteching circuit (4), password storage circuit (71) and the signal input end of incoming call prompting circuit (8) respectively, and the data terminal of password storage circuit (71) links to each other with the data terminal of control and management circuit (3).
Referring to Fig. 3, this device also has phone inlet wire port, change-over circuit (1) and telephone signal interface; Change-over circuit (1) is provided with either-or switch, and this either-or switch is mechanical switch or electronic switch; Change-over circuit (1) is arranged between phone inlet wire port and the interface circuit (2), L1 end in the input of either-or switch and the phone inlet wire port links to each other, an output in 2 outputs of either-or switch links to each other with telephone signal interface L1 ' end, and another output links to each other with an input of interface circuit (2); L2 end in the phone inlet wire port links to each other with another input of interface circuit (2).
Referring to Fig. 2, above-mentioned control and management circuit (3) is made up of channel switching circuit (31), power output circuit (32), the first off-hook control circuit (33) and CPU (38), and control and management circuit (3) also is provided with power output end; The input of channel switching circuit (31) is the passage input of control and management circuit (3), the power output end of channel switching circuit (31) connects the input of power output circuit (32), the output of power output circuit (32) is the power output end of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The ringing-current detecting signal input of the input double as control and management circuit (3) of power output circuit (32); The push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31); The output of power output circuit (32) links to each other with the power end of the first off-hook control circuit (33), power end and this power end that installs each relevant circuit of CPU (38).
Referring to Fig. 4, above-mentioned control and management circuit (3) also can be made up of channel switching circuit (31), power output circuit (32), the first off-hook control circuit (33), the second off-hook control circuit (34) and CPU (38), and control and management circuit (3) also is provided with power output end; The input of channel switching circuit (31) is the passage input of control and management circuit (3), the power output end of channel switching circuit (31) connects the input of power output circuit (32), the output of power output circuit (32) is the power output end of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The input of the second off-hook control circuit (34) is the ringing-current detecting signal input of control and management circuit (3), and the output of the second off-hook control circuit (34) is connected the signal input end of road switching circuit (31); The push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31); The output of power output circuit (32) links to each other with the power end of the first off-hook control circuit (33), power end and this power end that installs each relevant circuit of CPU (38).
Referring to Fig. 1 and Fig. 2, this device also has cue circuit (6), the power end of cue circuit (6) links to each other with the power output end of above-mentioned control and management circuit (3) power output circuit (32), and the signal input end of cue circuit (6) links to each other with the corresponding port of CPU (38) control signal output ends.
Referring to Fig. 6, this device can be provided with external power interface, and this interface links to each other with the power end of each relevant circuit; Control and management circuit (3) can also be made up of channel switching circuit (31), the first off-hook control circuit (33) and CPU (38); The input of channel switching circuit (31) is the passage input of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The ringing-current detecting signal input of CPU (38) is the ringing-current detecting signal input of control and management circuit (3), the push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31).
Referring to Fig. 1 and Fig. 6, the power output end of the channel switching circuit (31) of above-mentioned control and management circuit (3) can be used as the power output end of control and management circuit (3); The power end of cue circuit (6) links to each other with the power output end of channel switching circuit (31), and the signal input end of cue circuit (6) links to each other with the corresponding port of CPU (38) control signal output ends.
Referring to Fig. 1, Fig. 3 and Fig. 7, above-mentioned password storage circuit (71) has 2～10 mechanical type numbers parts is set, and the output that each mechanical type number is provided with parts links to each other with the corresponding data terminal of CPU (38).It is digital dial or the digital rotary switches with storage, setting and Presentation Function that described mechanical type number is provided with parts.
Referring to Fig. 1 and Fig. 5, this device also has password echo circuit (72); Above-mentioned change-over circuit (1) also be provided with ganged switch and with the auxiliary switch of either-or switch interlock; Auxiliary switch is mechanical switch or the electronic switch identical with either-or switch character, and an end of auxiliary switch links to each other with telephone signal interface L1 ', and the other end links to each other with the input of first switch of ganged switch; The other end of first switch of ganged switch links to each other with an input of interface circuit (2), and an end of the second switch of ganged switch connects the fixed level signal by resistance, an input of another termination CPU (38); The corresponding port of CPU (38) control signal output ends links to each other with the signal input end of password echo circuit (72), and the data terminal of CPU (38) and the input/output terminal of password storage circuit (71) be two-way to be connected and to link to each other with the input of password echo circuit (72).
The utlity model has positive effect: the use of (1) this device will make phone increase new function, not only can make the user when busy or rest, shield the person's of being unfamiliar with phone, and the person of being familiar with knows also whether called phone is in the state that can connect non-emergent phone will take on the telephone with the callee time, thereby can determine whether will call out the callee according to the emergency that will get in touch thing.(2) this device not only can be realized by discrete component, can also be realized by integrated circuit.In actual applications, any one in the circuit block diagram or a plurality of block diagram can be combined into by an integrated circuit and finish its function.Also can finish the function of function or two interface in a plurality of block diagrams of a block diagram with a plurality of integrated circuits.(3) the password storage circuit of this device can separate from the CPU setting, also can be arranged in the CPU, password adopts electromechanical means settings such as digital dial mode, also can be stored in the password storage circuit also can revise, and can also be solidificated in the circuit.If adopt the mode that is arranged in the storage circuit then can must import the high grade cryptosystem of revising password, import new password then by party-line setting or the non-party-line setting of far-end.(4) the power supply occupation mode of this device both can be designed so that the mode with external power supply, also can be designed so that the mode with the telephone wire power supply, to satisfy different needs.(5) this apparatus structure is ingenious, and is easy to operate, reliable operation; This device both can be used as a self-contained unit and had linked to each other with telephone set and words line in the phone outside, and the parts that also can be used as telephone set are arranged on telephone set inside.
Drawing of the present utility model is described as follows:
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is a kind of block diagram of control and management circuit among Fig. 1.
Fig. 3 is of the present utility model a kind of electrical schematic diagram of Figure 1 and Figure 2 circuit block diagram structure.
Fig. 4 is the another kind of block diagram of control and management circuit among Fig. 1.
Fig. 5 is of the present utility model a kind of electrical schematic diagram of Fig. 1 and circuit block diagram structure shown in Figure 4.
Fig. 6 is the another kind of block diagram of control and management circuit among Fig. 1.
Fig. 7 is of the present utility model a kind of electrical schematic diagram of Fig. 1 and circuit block diagram structure shown in Figure 6.
Fig. 8 is the of the present utility model another kind of electrical schematic diagram of Fig. 1 and circuit block diagram structure shown in Figure 6.
The utility model will be further described below in conjunction with drawings and Examples.
See Fig. 1, this device has change-over circuit (1), interface circuit (2), control and management circuit (3), telephone key-press signal deteching circuit (4), password storage circuit (71), incoming call prompting circuit (8), phone inlet wire port and telephone signal interface.An end of incoming cables L1 end in the phone inlet wire port of this device links to each other with the input of change-over circuit (1).An output in change-over circuit (1) output links to each other with an input A end of interface circuit (2), and another output links to each other with telephone signal interface L1 ' end.Another end of incoming cables L2 end in the phone inlet wire port links to each other with another input of interface circuit (2).The channel output end of interface circuit (2) connects the passage input D end of control and management circuit (3), the ringing-current detecting signal input C end of the ringing-current detecting signal output termination control and management circuit (3) of interface circuit (2); The telephone key-press signal input part of the telephone key-press signal output part E termination telephone key-press signal deteching circuit (4) of control and management circuit (3), the push button signalling data output end of telephone key-press signal deteching circuit (4) connect control and management circuit (3) push button signalling data input pin G end; The corresponding port F end of the control signal output ends of control and management circuit (3), O end, M end link to each other with telephone key-press signal deteching circuit (4), password storage circuit (71) and the signal input end of incoming call prompting circuit (8) respectively, and the data terminal of password storage circuit (71) links to each other with the data terminal K end of control and management circuit (3).
See Fig. 2, control and management circuit (3) is made up of channel switching circuit (31), power output circuit (32), the first off-hook control circuit (33) and CPU (38), and control and management circuit (3) also is provided with power output end H end; The input of channel switching circuit (31) is the passage input D end of control and management circuit (3), the input of the output termination power output circuit (32) of channel switching circuit (31), the output of power output circuit (32) is the power output end H end of control and management circuit (3), and the signal output part of channel switching circuit (31) is the telephone key-press signal output part E end of control and management circuit (3); The ringing-current detecting signal input C end of the input double as control and management circuit (3) of power output circuit (32); The push button signalling data input pin of CPU (38) is the push button signalling data input pin G end of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal K end of control and management circuit (3); The output of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31); The output H end of power output circuit (32) links to each other with power end and this power end that installs each relevant circuit of the power end of the first off-hook control circuit (33), CPU (38).
See Fig. 3, the main work loop of present embodiment comprises telephone key-press signal deteching circuit (4), CPU (38) and incoming call prompting circuit (8).Password storage circuit (71) is provided with 4 digital dials with storage, setting and Presentation Function, and the output of each digital dial links to each other with the corresponding data terminal K end of CPU (38).Digital dial claims digital dial or digital toggle switch again.
Change-over circuit (1) is provided with 1 either-or switch, L1 end in the input of either-or switch and the phone inlet wire port links to each other, an output in 2 outputs of this switch links to each other with telephone signal interface L1 ' end, and another output links to each other with an input A end of interface circuit (2).
Interface circuit (2) comprises polar protective circuit, overvoltage (thunderbolt) protective circuit and bell flowing detecting circuit.Polar protective circuit is made up of diode D1～D4; overvoltage (thunderbolt) protective circuit is made up of resistance R 19, piezo-resistance Z1 and resistance R 12 and voltage-stabiliser tube DZ1, and bell flowing detecting circuit is formed by resistance R 11, capacitor C 1 and by the bridge rectifier that diode D5～D8 constitutes.
When this device uses, one in the bifilar telephone wire of L1 termination of phone inlet wire port, another strand of L2 termination; Telephone signal interface L1 ' the machine of answering the call is talked about one in the line, and another strand of telephone set words line is attempted by on the L2 end.Be in the state of the interface circuit (2) of connecting this device as the either-or switch S4 of change-over circuit (1), when then ringing signal comes, charge through 2 pairs of capacitor C of inductance L 6 of control and management circuit (3) power output circuit (32) by R11, C1 and by the rectification circuit that D5～D8 forms, when the model that rises to CPU (38) as the voltage VCC of C6 is the required starting resistor of integrated circuit U2 of AT89C2051, then U2 starts working, and the voltage VCC of C6 provides the operating voltage of other relevant circuit.U2 gets electric back and does not stop issuing the WDG pulse from 3 pin, and the capacitor C 5 of pulse signal by control and management circuit (3) first off-hook control circuits (33) be generation drive triode T8 constantly, and T8 conducting moment makes capacitor C 4 capacitor discharges.C4 remains on electronegative potential makes triode T3 remain on conducting state.The power supply VCC in main like this work loop makes triode T5 conducting by triode T3, resistance R 4, and the T5 conducting then makes triode T1 conducting, and the T1 conducting then makes triode T6 conducting; So then main work loop being got electricity condition locks.Main work loop get electric after, the words line drop is low, simulation off-hook effect, then the phone off-hook is thought by office side, stops paying out ringing signal.
At this moment, the U2 of CPU reads the position signalling in each digital dial of password storage circuit (71).During the U2 read data, common data line D4～D7 is drawn signal with on weak, diode D12～D15 is taken turns to low level, the data wire with the common port conducting of corresponding digital dial demonstrates low level, demonstrate high level with the data wire of not conducting of common port, the digital dial position signalling that U2 will read back successively from data wire is as password value.
Meanwhile, after the calling party hears that office side's electricity words call waiting tone stops, can dial in password by main dialing telephone, behind the signal that office side's reception main dialing telephone is dialled in, send push button signalling to called phone by certain technical specification processing, push button signalling enters this device by circuit by L1, L2 in the phone inlet wire port of this device end.This push button signalling is successively through the collector electrode of the triode T1 of the polar protective circuit of the switch S 4 of change-over circuit (1), interface circuit (2) and control and management circuit (3) channel switching circuit (31) and enter telephone key-press signal deteching circuit (4) after capacitor C 8 couplings; Push button signalling enters the integrated circuit U1 that model is CM8870C after resistance R 21, when U1 judges that the signal that is received is when meeting the signal of certain technical specification, then export 11 pin of the StD signal of high level to U2 at its 15 pin, U2 is received by 11 pin and then makes the OE signal of its 6 pin behind the StD signal of high level is high level, and control U1 transports to corresponding data on the data wire and from corresponding ports and receives the U2.U2 compares these data and the code signal of obtaining from password storage circuit (71), U2 goes out the Beep pulse signal of frequency audiorange from its 8 human hair combing waste if password mates then, resistance R 28 by incoming call prompting circuit (8) drives triode T2, make the continuous conducting of T2, end, make buzzer BEEP1 continuous electric, outage and sounding tells the callee that emergency call is arranged.The callee picks up a receiver earlier, with 4 groups of sides to the called phone of direct connection of switch S, can converse again.
Install in 30 seconds when connecting this, U2 judges that password does not match or U2 does not receive the StD signal of the high level of U1, then simulates on-hook.At this moment, U2 stops paying out the WDG pulse, and triode T8 is ended, and the voltage of capacitor C 4 ends T3 because main operating circuit power supply VCC rises to its charging by resistance R 2, and T5 is owing to no drive signal is ended.T5 is by causing T1 to end, and T1 is by causing T6 to end, and T6 disconnects by causing talking about line and main work loop, and line load reduces, and line voltage distribution raises, the simulation on-hook.This moment, main work ring current voltage was owing to own loss reduces, when capacitor C 4 voltages are higher than main work ring current voltage, capacitor C 4 is discharged to main work ring current by D11, R24, causes capacitor C 4 voltages to reduce with main work ring current voltage.
Password can be provided with by each digital dial circuit of password setting circuit (71), and present embodiment has 4 digital dials, and each digital thumb wheel of machine chief commander goes to required digit position and gets final product.
The difference of present embodiment and embodiment 1 is as follows:
See Fig. 1, Fig. 4 and Fig. 5, present embodiment also is provided with cue circuit (6) and password echo circuit (72).The power end vdd terminal of cue circuit (6) links to each other with the power output end vdd terminal of control and management circuit (3) power output circuit (32), and the signal input end J end of cue circuit (6) links to each other with the corresponding port Audio end of CPU (38) control signal output ends.The corresponding port L of CPU (38) control signal output ends end links to each other with the signal input end of password echo circuit (72), and the data terminal K of CPU (38) holds with the input/output terminal of password storage circuit (71) is two-way and is connected and links to each other with the input of password echo circuit (72).
See Fig. 4, control and management circuit (3) also has the second off-hook control circuit (34).The input of the ringing-current detecting signal output termination second off-hook control circuit (34) of interface circuit (2), the input of the second off-hook control circuit (34) is the ringing-current detecting signal input C end of control and management circuit (3), and the output of the second off-hook control circuit (34) is connected the signal input end of road switching circuit (31).
See Fig. 5, change-over circuit (1) is provided with two either-or switch S4 of mutual interlock, is exactly either-or switch among the embodiment 1 as an either-or switch of main switch wherein, and another is as auxiliary switch.Change-over circuit (1) also is provided with ganged switch S3.The alternative auxiliary switch is provided with 2 inputs and an output, in 2 inputs one is unsettled, another links to each other with telephone signal interface L1 ' with input, the output of auxiliary switch links to each other with the input of first switch of ganged switch S3, the other end of first switch links to each other with an input A end of interface circuit (2), one end of the second switch of ganged switch is by resistance R 25 ground connection, the 17 pin SET inputs of another termination CPU (38) U2.
Be in the state of the interface circuit (2) of connecting this device as two either-or switch S4 of change-over circuit (1), when then ringing signal comes, the rectification circuit that resistance R 11, capacitor C 1 and D5 by interface circuit (2)～D8 forms is to capacitor C 2 chargings of the second off-hook control circuit (34) of control and management circuit (3), and the voltage of C2 can rise to the clamp by voltage-stabiliser tube DZ2 always.The voltage of C2 drives triode T4 conducting by resistance R 17, R30 dividing potential drop, causes triode T1 conducting, and T1 drives triode T6 by resistance R 29, and the base voltage of T6 is by voltage-stabiliser tube DZ3 clamp.The T6 conducting is connected words line and main operating circuit, and main operating circuit gets.Main work loop get electric after, the words line drop is low, simulation off-hook effect, then the phone off-hook is thought by office side, stops paying out ringing signal.U2 gets electric back and does not stop issuing the WDG pulse from 3 pin, and the capacitor C 5 of pulse signal by control and management circuit (3) first off-hook control circuits (33) be generation drive triode T8 constantly, and T8 conducting moment makes capacitor C 4 capacitor discharges.C4 remains on electronegative potential makes triode T3 remain on conducting state.The power supply VCC in main like this work loop makes triode T5 conducting by triode T3, resistance R 4, and the T5 conducting then makes triode T1 keep conducting state, main work loop is got electricity condition lock.The capacitor C 2 of interface circuit (2) is owing to no charging current, and its voltage slowly is discharged to 0V by resistance R 17, R30, and then triode T4 ends.
Main work loop get electric after, the U2 of CPU (38) goes out 1 pin that chip selection signal to model is the integrated circuit U4 of 93C46 from its 19 human hair combing waste, read encrypted message to CPU by data wire D1, its 9 human hair combing waste goes out the resistance R 15 driving triode T7s of the Audio pulse signal of frequency in audiorange by cue circuit (6), make the continuous conducting of T7, end, make the load variations frequency of talking about line in audiorange, and make the calling party hear cue from main dialing telephone.At this moment, the calling party can dial in password by main dialing telephone, under off hook state, the calling party is sent to this device by the telephone key signal by local side, behind change-over circuit (1), interface circuit (2), control and management circuit (3) and telephone key-press signal deteching circuit (4), enter the U2 of CPU (38) successively, after U2 relatively judges whether to correct code signal, carry out follow-up operation.
When password is set, two either-or switch S4 of interface circuit (2) are set to the phone works state earlier, ganged switch S3 is set to the password setting state, and the button S1 that clicks the first off-hook control circuit (33) in the control and management circuit (3) again makes main work loop get electric and simulation off-hook (the long-range password that is provided with only need be dialled this plane No.).The U2 of CPU (38) is judged as the password state that is provided with according to the SET signal, and then the data that provide by telephone key-press signal deteching circuit (4) of U2 are password according to predetermined protocol conversion.Push button signalling on the circuit can be produced by collinear phone, also can be produced by remote handset.U2 passes through can finish the read-write/storage of password to the control operation of the storage chip U4 of password storage circuit (71) and the read-write of data-signal.U2 is the control operation of integrated circuit U3 of 74HC164 and the read-write of data-signal by the model to password echo circuit (72), can realize the echo to password.
The difference of present embodiment and embodiment 1 is as follows:
See Fig. 1 and Fig. 6, control and management circuit (3) is made up of channel switching circuit (31), the first off-hook control circuit (33) and CPU (38), and present embodiment is replaced the power output circuit (32) of control and management circuit (3) by external power supply (5).The external power interface N of this device end links to each other with the power end of each relevant circuit, by the N end of external power supply (5) to each about circuit supply.The ringing-current detecting signal input of CPU (38) is the ringing-current detecting signal input of control and management circuit (3).
See Fig. 7, transistor T 6 and voltage-stabiliser tube DZ3 in the channel switching circuit (31) save.One end of resistance R 29 still connects transistor T 1 collector electrode, and other end ground connection is as the line load behind the off-hook.
See Fig. 7, when the device of present embodiment uses, by external power supply 5 each relevant circuit of this device is got earlier, be in the state of the interface circuit (2) of connecting this device as the either-or switch S4 of change-over circuit (1), when then ringing signal comes, pass through R11, C1 reaches the rectification circuit of being made up of D5～D8 capacitor C 2 is charged, the voltage of final capacitor C 2 is clamped on the high level state that CPU thinks and is no more than the high level limit that CPU is tolerated by voltage-stabiliser tube DZ2, when 7 pin that rise to the integrated circuit U2 of CPU (38) when the voltage of C2 detect high level signal, then U2 starts working, and goes out WDG signal etc. from its 3 human hair combing waste.All the other are identical with embodiment 1.
The difference of present embodiment and embodiment 3 is as follows:
See Fig. 6 and Fig. 8, present embodiment also is provided with cue circuit (6) and password echo circuit (72), and it is H ' power output end vdd terminal that control and management circuit (3) also is provided with label.The collector electrode of the triode T1 of channel switching circuit (31) is as the power output end vdd terminal of channel switching circuit (31), also as the power output end vdd terminal of control and management circuit (3).The power end VDD of cue circuit (6) links to each other with control and management circuit (3) power output end VDD, and the signal input end J end of cue circuit (6) links to each other with the corresponding port Audio end of CPU (38) control signal output ends.Change-over circuit (1) is identical with embodiment 2 with the structure of password storage circuit (71), password echo circuit (72), change-over circuit (1) are identical with embodiment 2 with the connection of other circuit separately, password storage circuit (71) course of work is slightly different with embodiment 2 in the course of work of relevant this part, entering to U2 detects the SET signal of the state that is provided with of password becomes low level signal and gets final product, and this circuit need not the button S1 among the embodiment 2.
All the other are identical with embodiment 3, and difference is: it is digital rotary switches that the mechanical type number of password storage circuit (71) is provided with parts, and the annexation of digital rotary switch and other circuit is substantially the same manner as Example 3.
Claims (10)
1, a kind of non-emergent phone screening arrangement has interface circuit (2), control and management circuit (3) and incoming call prompting circuit (8); The input of interface circuit (2) can link to each other with phone inlet wire port; It is characterized in that: this device also has telephone key-press signal deteching circuit (4) and password storage circuit (71); The channel output end of interface circuit (2) connects the passage input of control and management circuit (3), the ringing-current detecting signal input of the ringing-current detecting signal output termination control and management circuit (3) of interface circuit (2); The answer the call push button signalling input of push button signalling testing circuit (4) of the push button signalling output of control and management circuit (3), the push button signalling data output end of telephone key-press signal deteching circuit (4) connects control and management circuit (3) push button signalling data input pin; The corresponding port of the control signal output ends of control and management circuit (3) links to each other with telephone key-press signal deteching circuit (4), password storage circuit (71) and the signal input end of incoming call prompting circuit (8) respectively, and the data terminal of password storage circuit (71) links to each other with the data terminal of control and management circuit (3).
2, non-emergent phone screening arrangement according to claim 1, it is characterized in that: this device also has phone inlet wire port, change-over circuit (1) and telephone signal interface; Change-over circuit (1) is provided with either-or switch, and this either-or switch is mechanical switch or electronic switch; Change-over circuit (1) is arranged between phone inlet wire port and the interface circuit (2), L1 end in the input of either-or switch and the phone inlet wire port links to each other, an output in 2 outputs of either-or switch links to each other with telephone signal interface L1 ' end, and another output links to each other with an input of interface circuit (2); L2 end in the phone inlet wire port links to each other with another input of interface circuit (2).
3, non-emergent phone screening arrangement according to claim 2, it is characterized in that: control and management circuit (3) is made up of channel switching circuit (31), power output circuit (32), the first off-hook control circuit (33) and CPU (38), and control and management circuit (3) also is provided with power output end; The input of channel switching circuit (31) is the passage input of control and management circuit (3), the power output end of channel switching circuit (31) connects the input of power output circuit (32), the output of power output circuit (32) is the power output end of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The ringing-current detecting signal input of the input double as control and management circuit (3) of power output circuit (32); The push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31); The output of power output circuit (32) links to each other with the power end of the first off-hook control circuit (33), power end and this power end that installs each relevant circuit of CPU (38).
4, non-emergent phone screening arrangement according to claim 2, it is characterized in that: control and management circuit (3) is made up of channel switching circuit (31), power output circuit (32), the first off-hook control circuit (33), the second off-hook control circuit (34) and CPU (38), and control and management circuit (3) also is provided with power output end; The input of channel switching circuit (31) is the passage input of control and management circuit (3), the power output end of channel switching circuit (31) connects the input of power output circuit (32), the output of power output circuit (32) is the power output end of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The input of the second off-hook control circuit (34) is the ringing-current detecting signal input of control and management circuit (3), and the output of the second off-hook control circuit (34) is connected the signal input end of road switching circuit (31); The push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31); The output of power output circuit (32) links to each other with the power end of the first off-hook control circuit (33), power end and this power end that installs each relevant circuit of CPU (38).
5, according to claim 3 or 4 described non-emergent phone screening arrangements, it is characterized in that: this device also has cue circuit (6), the power end of cue circuit (6) links to each other with the power output end of control and management circuit (3) power output circuit (32), and the signal input end of cue circuit (6) links to each other with the corresponding port of CPU (38) control signal output ends.
6, non-emergent phone screening arrangement according to claim 2, it is characterized in that: this device is provided with external power interface, and this interface links to each other with the power end of each relevant circuit; Control and management circuit (3) is made up of channel switching circuit (31), the first off-hook control circuit (33) and CPU (38); The input of channel switching circuit (31) is the passage input of control and management circuit (3), and the signal output part of channel switching circuit (31) is the push button signalling output of control and management circuit (3); The ringing-current detecting signal input of CPU (38) is the ringing-current detecting signal input of control and management circuit (3), the push button signalling data input pin of CPU (38) is the push button signalling data input pin of control and management circuit (3), the control signal output ends of control and management circuit (3) is formed in the corresponding port of the control signal output ends of CPU (38), and the data terminal of CPU (38) is the data terminal of control and management circuit (3); The control signal output ends of CPU (38) also comprises off-hook control signal output ends mouth, and this port links to each other with the off-hook signal input end of the first off-hook control circuit (33); The output of the first off-hook control circuit (33) is connected the signal input end of road switching circuit (31).
7, non-emergent phone screening arrangement according to claim 6, it is characterized in that: control and management circuit (3) also is provided with power output end, and the power output end of channel switching circuit (31) is the power output end of control and management circuit (3); This device also has cue circuit (6), the power end of cue circuit (6) links to each other with the power output end of control and management circuit (3), and the signal input end of cue circuit (6) links to each other with the corresponding port of CPU (38) control signal output ends.
8, according to claim 3 or 4 or 6 described non-emergent phone screening arrangements, it is characterized in that: password storage circuit (71) has 2～10 mechanical type numbers parts is set, and the output that each mechanical type number is provided with parts links to each other with the corresponding data terminal of CPU (38).
9, want 8 described non-emergent phone screening arrangements according to right, it is characterized in that: it is digital dial or the digital rotary switches with storage, setting and Presentation Function that the mechanical type number is provided with parts.
10, according to claim 3 or 4 or 6 described non-emergent phone screening arrangements, it is characterized in that: this device also has password echo circuit (72); Change-over circuit (1) also be provided with ganged switch and with the auxiliary switch of either-or switch interlock; Auxiliary switch is mechanical switch or the electronic switch identical with either-or switch character, and an end of auxiliary switch links to each other with telephone signal interface L1 ', and the other end links to each other with the input of first switch of ganged switch; The other end of first switch of ganged switch links to each other with an input of interface circuit (2), and an end of the second switch of ganged switch connects the fixed level signal by resistance, an input of another termination CPU (38); The corresponding port of CPU (38) control signal output ends links to each other with the signal input end of password echo circuit (72), and the data terminal of CPU (38) and the input/output terminal of password storage circuit (71) be two-way to be connected and to link to each other with the input of password echo circuit (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219165 CN2404281Y (en) | 2000-01-17 | 2000-01-17 | Non-emergency telephone shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219165 CN2404281Y (en) | 2000-01-17 | 2000-01-17 | Non-emergency telephone shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2404281Y true CN2404281Y (en) | 2000-11-01 |
Family
ID=33584390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219165 Expired - Fee Related CN2404281Y (en) | 2000-01-17 | 2000-01-17 | Non-emergency telephone shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2404281Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459621C (en) * | 2005-12-07 | 2009-02-04 | 上海亿人通信终端有限公司 | Incoming display telephone without external connecting power and cell |
-
2000
- 2000-01-17 CN CN 00219165 patent/CN2404281Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459621C (en) * | 2005-12-07 | 2009-02-04 | 上海亿人通信终端有限公司 | Incoming display telephone without external connecting power and cell |
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| CF01 | Termination of patent right due to non-payment of annual fee |