CN2323526Y - Computerized telephone number lock for telephone - Google Patents
Computerized telephone number lock for telephone Download PDFInfo
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- CN2323526Y CN2323526Y CN 97231507 CN97231507U CN2323526Y CN 2323526 Y CN2323526 Y CN 2323526Y CN 97231507 CN97231507 CN 97231507 CN 97231507 U CN97231507 U CN 97231507U CN 2323526 Y CN2323526 Y CN 2323526Y
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Abstract
The utility model relates to a computerized telephone number lock for a telephone, which is composed of a power supply acquisition circuit, a single chip computer control circuit, a code receiving circuit, a preformed code circuit, a talking blocking circuit, external line terminals and telephone terminals, wherein an input terminal of the code receiving circuit is connected with the telephone terminals, and an output terminal of the code receiving circuit is connected with an input port of a single chip computer; a I/O port of the preformed code circuit is connected with a I/O port of the single chip computer; one output terminal of the single chip computer is connected with a control end of the power acquisition circuit by the talking blocking circuit; an input terminal of the power acquisition circuit is connected with one external line terminal and one telephone terminal, and an output terminal of the power acquisition circuit provides the electricity for the single chip computer, the code receiving circuit and the preformed code circuit, and is connected with one input terminal of the single chip computer by a switch pipe. The telephone numbers can be locked and canceled by the utility model in an online mode. The computerized telephone number lock for a telephone has the advantages of high integration degree, strong confidentiality and convenient use.
Description
The utility model relates to a kind of telephone number locking device, belongs to HO4M class telephone communicating technology field.
Along with continuing to bring out of all kinds of charge voice communication information platforms, the telephone charges of unit or family also rises significantly.In the case, the user presses for the function that telephone set has limit group such information station.And present telephone set or Private Branch Exchange PBX do not have the telephone number lock function mostly, though having of having, the telephone number that they locked is very limited, and can not realize functions such as on-line setup, modification.
In view of above-mentioned, the purpose of this utility model provides a kind of telephone number computer lock with on-line setup, modify feature.
For achieving the above object, the utility model adopts following design:
A kind of telephone number computer lock is made of power supply acquisition cuicuit, single chip machine controlling circuit, receipts decoding circuit, code presupposition circuit, conversation blocking circuit, outside line binding post and phone binding post.Wherein: the input of the receiving decoding circuit machine binding post of answering, output connects input of single chip; The I/O port of code presupposition circuit and the I/O port of single-chip microcomputer join; An output of single-chip microcomputer connects the control end of power supply acquisition cuicuit through the conversation blocking circuit; The input of power supply acquisition cuicuit connects one of outside line binding post and one of phone binding post, and its output is to single-chip microcomputer, receipts decoding circuit, code presupposition circuit supply, and its output also connects an input of single-chip microcomputer through a switching tube.
In implementing measure of the present utility model:
Described power supply acquisition cuicuit is made of rectifier bridge and pressurizer, one of two input termination outside line binding posts of this rectifier bridge and one of phone binding post; Described conversation blocking circuit is made of electronic switch, and its input connects an output of single-chip microcomputer, and its output is gone here and there between the rectifier bridge and pressurizer of power supply acquisition cuicuit;
Described receipts decoding circuit is made of dual-tone multifrequency decoder and peripheral circuit, and two audio input end is through the electric capacity machine binding post of answering, and its digital output port connects input of single chip;
Described code presupposition circuit is made of the electrically-erasable memory, and its bus port connects the I/O port of single-chip microcomputer.
The power supply acquisition cuicuit changes into the required operating voltage of device with the voltage in the outside line, and control program is housed in the single-chip microcomputer, needs the number of locking to deposit in the code presupposition circuit.The number that telephone set is dialled is after the receipts decoding circuit is delivered to single-chip microcomputer, single-chip microcomputer with its with the code presupposition circuit in the number of depositing compare one by one: if having identical, the conversation blocking circuit is turn-offed, cut off path between outside line and the words line end, make this number can not put through and be lockable; If different, the blocking circuit of then conversing is failure to actuate, and this number can be transferred to.When some number needn't limit again, can onlinely cancel, when needing to limit new digit, but online locking.
Because this device employing Single-chip Controlling, can be with telephone number online locking or online cancellation, so have integrated level height, strong security, advantage easy to use.
Below in conjunction with drawings and Examples the utility model is elaborated.
Fig. 1 is a circuit diagram of the present utility model.
This device is made of power supply acquisition cuicuit, single chip machine controlling circuit, receipts decoding circuit, code presupposition circuit, conversation blocking circuit, outside line binding post and phone binding post, and foregoing circuit is contained in the shell.Wherein: the input of the receiving decoding circuit machine binding post of answering, output connects input of single chip; The I/O port of code presupposition circuit and the I/O port of single-chip microcomputer join; An output of single-chip microcomputer connects the control end of power supply acquisition cuicuit through the conversation blocking circuit; The input of power supply acquisition cuicuit connects one of outside line binding post and one of phone binding post, and its output is to single-chip microcomputer, receipts decoding circuit, code presupposition circuit supply, and its output also connects an input of single-chip microcomputer through a switching tube.Among the figure:
1,2 ends are outside line terminals EXT, nonpolarity requirement.3,4 ends are the trunk connection end TEL of telephone set or small switch, nonpolarity requirement.
The power supply acquisition cuicuit is made up of rectifier bridge V1～V4 and voltage-stabiliser tube V6, two input termination outside line terminals 1 and phone terminals 4 of rectifier bridge, V6 provides 5.1V voltage VZ, VZ to AT89C2051 single-chip microcomputer D1, receive decoding circuit D2, code presupposition circuit D3 power supply, and meet the input P11 of single-chip microcomputer D1 through diode V9 and switching tube V11.
The conversation blocking circuit is the two-stage electronic switch that is made of V7, V8, V5, and the input of the base stage of its V7 meets the output P35 of single-chip microcomputer D1, and the collecting of its V5-emitter-base bandgap grading output is gone here and there between the rectifier bridge and voltage-stabiliser tube of power supply acquisition cuicuit.When the output P35 of single-chip microcomputer D1 was high, V7 conducting, V8 and V5 ended, and made that the path between outside line and the words line end is blocked.The output P35 of single-chip microcomputer D1 is when low, and V7 makes that by, V8 and V5 conducting the path between outside line and the words line end is switched on.
Receiving decoding circuit is made of MT8870 dual-tone multifrequency decoder D2 and peripheral circuit, two audio input end IN-and IN+ are respectively through capacitor C 9, C10 answer machine terminals 3 and 4, its digital output port D01～D04 meets input port P14～P17 of single-chip microcomputer D1, and its Enable Pin EN connects the P13 pin of single-chip microcomputer D1.
The code presupposition circuit is made of AT24C01A electrically-erasable memory D3 (E2PROM), and its bus port meets I/O port P30 and the P31 of single-chip microcomputer D1.
In the single-chip microcomputer D1 control program is housed, needs the number of locking to deposit among the code presupposition circuit D3.
Narrate its operation principle below:
When being in hook state, it also is 48V voltage that the EXT end has 48V voltage, TEL.Behind the TEL off-hook, on the TEL ring, the power supply acquisition cuicuit produces the 5.1V voltage VZ that uses for this device, and VZ resets single-chip microcomputer D1 through diode V10, capacitor C 3, resistance R 9, the program running in the single-chip microcomputer D1, and the indicator light V16 that is connected to its P32 end is lighted.At this moment, digital output port D01～D04 of dual-tone multifrequency decoder D2 is all 0, switching tube V11 conducting, and the P11 input O of single-chip microcomputer D1, P35 exports O, and the path between outside line and the words line end is switched on, and waits for dialing.
When phone sends the DTMF double-audio signal, this signal enters two audio input end IN-and the IN+ of dual-tone multifrequency decoder D2 through capacitor C 9, C10, by becoming digital code after the D2 decoding and getting on its digital output port D01～D04, after the procedure identification of single-chip microcomputer D1, deposit in the internal RAM of single-chip microcomputer.If what phone sent is pulse signal, then VZ changes with the height of this pulse signal, makes switching tube V11 also with the pulse signal alternation switch, then bring out existing " 0 ", " 1 " alternate at the P11 of single-chip microcomputer, again by depositing among the RAM behind the procedure identification number.During VZ changed, because the power end of each integrated circuit all is connected to electric capacity, the power supply that therefore is added to integrated circuit was still stable.
Program among the single-chip microcomputer D1 compares the number of depositing among the number deposited among the RAM and the code presupposition circuit D3 one by one: if identical person is arranged, then the P35 of single-chip microcomputer D1 exports high level, the conversation blocking circuit is turn-offed, thereby blocking-up is to the power supply of phone, cut off the path between outside line and phone, this number promptly is equivalent to on-hook, so can not be transferred to; If different, the P35 output low level of single-chip microcomputer D1 then, phone still obtains power supply, and the path between outside line and phone is held, and this number can normally be transferred to.
Single chip machine controlling circuit is the core of this device, and it can realize following function: open the computer lock; To computer lock private code; The number that needs are limited deposits among the code presupposition circuit D3; Qualification number among the cancellation code presupposition circuit D3; With the conversion mutually between finite-state and non-limiting state of the qualification sign indicating number among the code presupposition circuit D3.
Be in locking states before this device is enabled, when enabling must by the user unblank and enroll user cipher after could use.Its method of operation is as follows:
1. unblank: after off-hook is heard dialing tone, push code-locked " * * 1234 " aside with phone
2. self-editing user cipher: under unlocking condition, dial " * #A with phone
1B
1C
1D
1", A
1B
1C
1D
1For the four-digit number code form establish password certainly, after the on-hook, establish password certainly and just be written among the code presupposition circuit D3.
3. setting limit dials the number: off-hook is heard dialing tone and is dialled " * * A with phone
1B
1C
1D
1" after, to dial " #* " and limit again and dial the number, after the on-hook, this dail-limiting number just is written among the code presupposition circuit D3.Maximum eight of every group of dail-limiting number, eight persons of less than finish in advance with " # " sign indicating number.As: " #*O# ", " #*168# ", " #*160# ", " #*266# ", " #*282# ", " #*63888845 ".
4. cancellation dail-limiting number: off-hook is heard dialing tone and is dialled " * * A with phone
1B
1C
1D
1" after, to dial " ## " and limit again and dial the number, after the on-hook, this dail-limiting number just is cancelled.As: " ##0# ", " ##168# ", " ##160# ", " ##266# ", " ##282# ", " ##63888845 ".
5. finite-state and non-limiting state exchange: off-hook is heard dialing tone and is dialled " * * A with phone
1B
1C
1D
1* ", on-hook then will make the dail-limiting number release like this, but not dail-limiting number can not be got through.As need transition status again, dial " * * A again one time
1B
1C
1D
1* " get final product.
In aforesaid operations, as voice suggestion or busy tone, can ignore and continue the operation.
Below only be preferred embodiment of the present utility model, any based on equivalents of the present utility model, all should be within protection range of the present utility model.
Claims (4)
1. a telephone number computer lock comprises power supply acquisition cuicuit, single chip machine controlling circuit, outside line binding post and phone binding post, it is characterized in that: it also comprises receives decoding circuit, code presupposition circuit, conversation blocking circuit, wherein:
The input of the receiving decoding circuit machine binding post of answering, its output connects input of single chip;
The I/O port of code presupposition circuit and the I/O port of single-chip microcomputer join;
An output of single-chip microcomputer connects the control end of power supply acquisition cuicuit through the conversation blocking circuit;
The input of power supply acquisition cuicuit connects one of outside line binding post and one of phone binding post, and its output is to single-chip microcomputer, receipts decoding circuit, code presupposition circuit supply, and its output also connects an input of single-chip microcomputer through a switching tube.
2. telephone number computer lock as claimed in claim 1 is characterized in that:
Described power supply acquisition cuicuit is made of rectifier bridge and pressurizer, one of two input termination outside line binding posts of this rectifier bridge and one of phone binding post;
Described conversation blocking circuit is made of electronic switch, and its input connects an output of single-chip microcomputer, and its output is gone here and there between the rectifier bridge and pressurizer of power supply acquisition cuicuit.
3. telephone number computer lock as claimed in claim 1, it is characterized in that: described receipts decoding circuit is made of dual-tone multifrequency decoder and peripheral circuit, two audio input end is through the electric capacity machine binding post of answering, and its digital output port connects input of single chip.
4. telephone number computer lock as claimed in claim 1, it is characterized in that: described code presupposition circuit is made of the electrically-erasable memory, and the I/O port of its bus port and single-chip microcomputer joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231507 CN2323526Y (en) | 1997-12-24 | 1997-12-24 | Computerized telephone number lock for telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231507 CN2323526Y (en) | 1997-12-24 | 1997-12-24 | Computerized telephone number lock for telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2323526Y true CN2323526Y (en) | 1999-06-09 |
Family
ID=33943718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97231507 Expired - Fee Related CN2323526Y (en) | 1997-12-24 | 1997-12-24 | Computerized telephone number lock for telephone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2323526Y (en) |
-
1997
- 1997-12-24 CN CN 97231507 patent/CN2323526Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |