CN2383282Y - Monitoring device for telephone line state - Google Patents
Monitoring device for telephone line state Download PDFInfo
- Publication number
- CN2383282Y CN2383282Y CN 99208705 CN99208705U CN2383282Y CN 2383282 Y CN2383282 Y CN 2383282Y CN 99208705 CN99208705 CN 99208705 CN 99208705 U CN99208705 U CN 99208705U CN 2383282 Y CN2383282 Y CN 2383282Y
- Authority
- CN
- China
- Prior art keywords
- inverting amplifier
- telephone wire
- inverter
- telephone line
- state detecting
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Telephonic Communication Services (AREA)
Abstract
The utility model relates to a monitoring device for a telephone line state. The utility model is mainly characterized in that when a telephone line is connected with a data unit, a hardware monitoring circuit is also provided to connect with a processing unit. When the utility model is used, the hardware monitoring circuit monitors the pulse generated by the voltage on the telephone line. After the pulse is processed by the processing unit, people can judge whether a telephone line is disconnected or the telephone line is in poor contact, or the telecommunication device matched with the telephone is busy or not in use.
Description
The utility model relates to a kind of telephone wire state detecting device, and whether it produces pulse by the detecting telephone wire, judges whether telephone wire breaks or loose contact, and perhaps the telecommunication apparatus that cooperates with it is at the state that the line is busy or nobody uses.
The major function of telephone wire is transmission signals, make the user and the external world link up, but only can allow the user know whether the success of conversing on the present regular phone line, all have no way of learning as for other user mode or the state of itself, so, the user can't be judged at all.
The purpose of this utility model is to improve the above-mentioned shortcoming of commonly using device construction, and a kind of telephone wire state detecting device is provided, and it can judge whether telephone wire breaks or loose contact, and perhaps the telecommunication apparatus that cooperates with it is at the state that the line is busy or nobody uses.
The purpose of this utility model is achieved in that a kind of telephone wire state detecting device, comprise the hardware detection circuit on this device, this hardware detection circuit is provided with one first inverting amplifier, first pin of this first inverting amplifier is connected with the holding wire of telephone wire, and the crus secunda of this first inverting amplifier is connected with processing unit, the tripod of this first inverting amplifier is connected with first pin of second inverting amplifier, the tripod of this second inverting amplifier is connected with the resistance that is connected in parallel, one of them resistance and an operational amplifier are serially connected, another resistance then is connected with an electric capacity, and the output of this electric capacity is connected with one first inverter, the output of this first inverter is connected with second inverter, and the output of this second inverter then can show that with one the circuit of detecting the result is connected.
Telephone wire state detecting device of the present utility model, wherein said processing unit can further comprise: the processor as judgment processing; Deposit the read-only memory (ROM) of frequency setting value and related data; And the random asccess memory (RAM) that supplies temporary data to use.
Telephone wire state detecting device of the present utility model, wherein said display circuit can be diode.
Telephone wire state detecting device of the present utility model, wherein said display circuit can be display screen.
A kind of telephone wire state detecting device of the present utility model, it is a kind of pulse that utilizes telephone wire to send, judge the device of user mode, in use, by the pulse that voltage produced on the hardware detection circuit detecting telephone wire,, can judge whether telephone wire breaks or loose contact again by after the processing unit processes, or the telecommunication apparatus of Pei Heing is at the state that the line is busy or nobody uses with it, thereby can reach purpose of design of the present utility model.
Conjunction with figs. by the following examples is described in detail as follows:
The simple declaration of accompanying drawing:
Fig. 1: electrical block diagram of the present utility model.
With reference to shown in Figure 1, a kind of telephone wire state detecting of the utility model device, it is the pulse that a kind of DAA2000 of utilization sends, judge the device of user mode, this device is provided with a hardware detection circuit 10, this hardware detection circuit 10 is provided with one first inverting amplifier 11, first pin 111 of this first inverting amplifier be connected with the holding wire of modem 100 (telephone wire is numbering DAA2000 series in the present embodiment), the tripod 113 of this first inverting amplifier 11 is connected on first pin 121 of second inverting amplifier 12, the tripod 123 of this second inverting amplifier 12 is connected with the resistance 13 that is connected in parallel, wherein a resistance 13 and an operational amplifier 14 are serially connected, another resistance 13 then is connected in series with an electric capacity 15, the output of this electric capacity 15 then is connected with one first inverter 16, the output of this first inverter 16 is connected with second inverter 17, the output of this second inverter 17 then is connected with a display circuit 30, this display circuit 30 can be shown the detecting result of hardware detection circuit 10, and this display circuit 30 can be diode or display screen.
The crus secunda 112 of this first inverting amplifier 11, then be connected with processing unit 20, this processing unit 20 is provided with one as handling the processor (CPU) 21 of judging usefulness, this processing unit 20 is connected with read-only memory (ROM) 22 and random asccess memory (RAM) 23 respectively, wherein, frequency setting value and related data have been deposited in the read-only memory (ROM) 22.
With reference to shown in Figure 1, when modem 100 and relevant communication equipment (as phone) when being connected, processor 21 on the processing unit 20 can be according to the frequency that telephone wire produced, in coming judgment data machine 100 whether the line is busy to use, as denying, then utilize the frequency that (is DM207.23 in the present embodiment) in the processor 21 calculated data machines 100 of processing unit 20, be placed in the random asccess memory (RAM), simultaneously, the data that is stored in relevant frequency setting value in the read-only memory (ROM) 22 is taken out, after being judged,, start hardware detection circuit 10 when signal frequency during greater than set point; And, close hardware detection circuit 10 when signal frequency during less than set point; In addition, when signal frequency equals 0, close hardware detection circuit 10, trigger data machine 100 sends pulse signal simultaneously.
When hardware detection circuit 10 was activated, first inverting amplifier, 11, the second inverting amplifiers 12 and the charging circuit system that is made up of resistance 13, operational amplifier 14 and electric capacity 15 were controlled by and start or close; In addition, first pin 111 of first inverting amplifier 11 receives the pulse signal that modem 100 is sent, and the crus secunda 112 of first inverting amplifier 11 starts or closes and accept the pulse signal that modem 100 is sent, promptly, when the crus secunda 112 of first inverting amplifier 11 is high potential, promptly equal to start and accept the pulse signal that modem 100 is sent, otherwise, when the crus secunda 112 of first inverting amplifier 11 is electronegative potential, promptly equal to close and accept the pulse signal that modem 100 is sent, moreover, when second inverting amplifier, 12 tripods 123 are passed through in pulse, promptly can be by 13 pairs of electric capacity 15 quick charges of coupled resistance, output with second inverter 17 becomes high potential rapidly, and after pulse, when the crus secunda 112 of first inverting amplifier 11 equaled electronegative potential, electric capacity 15 can discharge gradually by coupled resistance 13, wherein, electronegative potential is represented the present phone that links to each other with modem 100, have miscellaneous equipment just in use, or wiring is bad; High potential is then represented the present phone that links to each other with modem 100, is not connected with any miscellaneous equipment, then represents to have miscellaneous equipment to insert if any pulse.
Claims (4)
1, a kind of telephone wire state detecting device, it is characterized in that: comprise the hardware detection circuit on this device, this hardware detection circuit is provided with one first inverting amplifier, first pin of this first inverting amplifier is connected with the holding wire of telephone wire, and the crus secunda of this first inverting amplifier is connected with processing unit, the tripod of this first inverting amplifier is connected with first pin of second inverting amplifier, the tripod of this second inverting amplifier is connected with the resistance that is connected in parallel, one of them resistance and an operational amplifier are serially connected, another resistance then is connected with an electric capacity, and the output of this electric capacity is connected with one first inverter, the output of this first inverter is connected with second inverter, and the output of this second inverter then can show that with one the circuit of detecting the result is connected.
2, telephone wire state detecting device as claimed in claim 1, it is characterized in that: described processing unit further comprises:
Processor as judgment processing;
Deposit the read-only memory (ROM) of frequency setting value and related data;
And the random asccess memory (RAM) that supplies temporary data to use.
3, telephone wire state detecting device as claimed in claim 1 or 2, it is characterized in that: wherein said display circuit is a diode.
4, telephone wire state detecting device as claimed in claim 1 or 2, it is characterized in that: wherein said display circuit is a display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99208705 CN2383282Y (en) | 1999-04-07 | 1999-04-07 | Monitoring device for telephone line state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99208705 CN2383282Y (en) | 1999-04-07 | 1999-04-07 | Monitoring device for telephone line state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2383282Y true CN2383282Y (en) | 2000-06-14 |
Family
ID=34002418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99208705 Expired - Fee Related CN2383282Y (en) | 1999-04-07 | 1999-04-07 | Monitoring device for telephone line state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2383282Y (en) |
-
1999
- 1999-04-07 CN CN 99208705 patent/CN2383282Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2004202570A1 (en) | Universal Serial Bus Charger for a Mobile Device | |
| CN103682491A (en) | Charging method between electronic devices, charging circuits and electronic devices | |
| CN201039411Y (en) | A mobile phone with self-adapted charging device | |
| US5659602A (en) | Telephone apparatus for caller ID | |
| CN1093364C (en) | Fixed subscriber unit | |
| CN2383282Y (en) | Monitoring device for telephone line state | |
| JP2693927B2 (en) | Battery pack for mobile phone | |
| JPH09162960A (en) | Charger | |
| CN1119053C (en) | Hand-held radio transmit-receiver set | |
| CN213780339U (en) | Broken string detection circuitry and treasured that charges of polymorphic type charging wire | |
| CN219960179U (en) | Cable charge-discharge structure and mobile access terminal equipment capable of supporting external charging | |
| CA2289383A1 (en) | A system and method for detecting an off-hook condition | |
| CN2329123Y (en) | Anti-frandulent use of telephone and cipher limiting dialing and automatic dialing alarm | |
| CN2504855Y (en) | Decoder for building talkback and information system | |
| CN2251227Y (en) | Anti-theft apparatus for telephone | |
| CN2279038Y (en) | Intelligent connector box for preventing fraudulent calling | |
| CN2194570Y (en) | Anti-stealing device for telephone line | |
| KR100201937B1 (en) | Send signal release method of loop-trunk in pbx | |
| KR100640503B1 (en) | Method of automatically converting alarm mode in portable telephone | |
| EP1185059A3 (en) | Telephone set | |
| CN2252462Y (en) | Telephone remote control and filtering device | |
| CN2826860Y (en) | Incoming call sorter | |
| JPH0339968Y2 (en) | ||
| CN2596690Y (en) | Coined hand phone charger | |
| PT1181640E (en) | ADAPTABLE MAN / MACHINE INTERFACE DEVICE |
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 |