CN2549665Y - Automatic take-off device for telephone communication - Google Patents
Automatic take-off device for telephone communication Download PDFInfo
- Publication number
- CN2549665Y CN2549665Y CN 02233232 CN02233232U CN2549665Y CN 2549665 Y CN2549665 Y CN 2549665Y CN 02233232 CN02233232 CN 02233232 CN 02233232 U CN02233232 U CN 02233232U CN 2549665 Y CN2549665 Y CN 2549665Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- telephone
- directional
- microprocessor
- 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 - Lifetime
Links
- 238000004891 communication Methods 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 abstract 4
- 230000001419 dependent effect Effects 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Landscapes
- Devices For Supply Of Signal Current (AREA)
Abstract
An automatic take-off device for telephone communication belongs to the remote control field of telephone and solves the problems of high cost, large volume and unsatisfying safety property of the prior take-off control devices of telephone communication. The utility model includes a directional circuit consisting of diodes D1 to D4, a compound tube circuit consisting of a resistance R6, dynatrons T2 and T1, a voltage dependent resistance ZNR, an equivalent resistance consisting of resistances R4, R5 and a DC resistance of an audio transformer, and a microprocessor. The utility model is structurally characterized in that a telephone line CJ2 is connected with the directional circuit; the voltage dependent resistance ZNR is connected in parallel with the directional circuit; the cathode terminal of the directional circuit is grounded, and the anode terminal is connected with a transmitting terminal of the dynatron T1 in the compound tube circuit. The collector poles of the dynatrons T2 and T1 in the compound tube circuit are connected with the equivalent resistance. The microprocessor is connected with a basal electrode of the dynatron T2 of the compound tube circuit through a photocoupler U7-2. Besides, the utility model is mainly used in the telephone devices of household network communication.
Description
Technical field
The utility model relates to a kind of automatic offhook device that is used for telephonic communication, belongs to telephone remote control field.
Background technology
The automatic off-hook technology of existing telephonic communication normally utilizes the double-tone frequency power transformer to regulate the resistance value that smart phone inserts telephone network, so that make its impedance and loop current meet the requirement of national standard telephone network.And double-tone frequency power transformer volume is bigger, and does not domesticly produce in batches, needs customization or from ordering abroad.Therefore, the dislodging machine control device of existing smart phone exists cost height, volume big, and perhaps poor safety performance may be damaged the equipment of telephone office, the problem that telephone network is had a negative impact.
The utility model content
At above-mentioned the problems of the prior art, the utility model provides that a kind of cost is low, security performance good, the automatic offhook device that is used for telephonic communication that telephone network is not exerted an influence.
The technical solution of the utility model, realize as follows:
A kind of automatic offhook device that is used for telephonic communication comprises the directional circuit of being made up of diode D1-D4, by resistance R 6, the composite pipe circuit that triode T2 and T1 form, piezo-resistance ZNR, by resistance R 4 and R5, the equivalent resistance that the D.C. resistance of audio frequency transformer is formed, microprocessor, it is characterized in that, telephone wire CJ2 connects directional circuit, the piezo-resistance ZNR directional circuit that inserts in parallel, the directional circuit negativing ending grounding, anode connects the emitter of triode T1 in the composite pipe circuit, the collector electrode of triode T1 and T2 is connected with equivalent resistance in the composite pipe circuit, and microprocessor connects the base stage of triode T2 in the composite pipe circuit by optocoupler U7-2.
The utility model has been protected telephone communication device owing to used the make a return journey high voltage interference of telephone wire of piezo-resistance.Also used equivalent resistance to come regulating system to insert the resistance value of telephone network in this device, guaranteed that the direct current in the telephone wire is about 20MA when triode T1 conducting.Avoided the influence of device, reduced the cost of phone dislodging machine control device Be Controlled electrical equipment and telephone network.Audio frequency transformer has been realized the mutual coupling of signals such as DTMF, voice, process simultaneously, and realizes the electrical isolation of telephone wire and microprocessor.
Description of drawings
Accompanying drawing is a circuit connection diagram of the present utility model.
Embodiment
Referring to accompanying drawing, a kind of automatic offhook device that is used for telephonic communication comprises the directional circuit of being made up of diode D1-D4 1, the composite pipe circuit of forming by resistance R 6, triode T2 and T1 2, piezo-resistance ZNR, by the equivalent resistance 3 that the D.C. resistance of resistance R 4 and R5, audio frequency transformer B1 is formed, model is the microprocessor 4 of 89C52.Its design feature is, telephone wire CJ2 connects directional circuit 1, the piezo-resistance ZNR directional circuit 1 that inserts in parallel, directional circuit 1 negativing ending grounding, anode connects the emitter of triode T1 in the composite pipe circuit 2, the collector electrode of triode T1 and T2 is connected with equivalent resistance 3 in the composite pipe circuit 2, and microprocessor 4 is the base stage that the optocoupler U7-2 of TLP521 connects triode T2 in the composite pipe circuit 2 by model.When the pin of microprocessor 4 was high level, 6, the 5 pin conductings of optocoupler U7-2 made the T1 conducting of composite pipe circuit 2.No matter the polarity of telephone wire how, directional circuit 1 guarantees that the emitter of T1 is positive voltage.Piezo-resistance ZNR be for the high-tension interference of removing telephone wire as thunderbolt etc., the protection phone module is unlikely to damage.When the T1 conducting, equivalent resistance 3 guarantees that the direct current in the telephone wire is: about 20MA, realize normal handoff functionality.Audio frequency transformer B1 realizes the mutual coupling of signals such as DTMF, voice, process simultaneously, and realizes the electrical isolation of telephone wire and microprocessor 4.
Claims (2)
1. an automatic offhook device that is used for telephonic communication comprises the directional circuit of being made up of diode D1-D4 (1), by resistance R 6, the composite pipe circuit (2) that triode T2 and T1 form, piezo-resistance ZNR, by resistance R 4 and R5, the equivalent resistance (3) that the D.C. resistance of audio frequency transformer B1 is formed, microprocessor (4), it is characterized in that, telephone wire CJ2 connects directional circuit (1), the piezo-resistance ZNR directional circuit (1) that inserts in parallel, directional circuit (1) negativing ending grounding, anode connects the emitter of triode T1 in the composite pipe circuit (2), the collector electrode of triode T1 and T2 is connected with equivalent resistance (3) in the composite pipe circuit (2), and microprocessor (4) connects the base stage of triode T2 in the composite pipe circuit (2) by optocoupler U7-2.
2. device as claimed in claim 1 is characterized in that, described microprocessor (4) model is 89C52, and the model of described optocoupler U7-2 is TLP521.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02233232 CN2549665Y (en) | 2002-04-27 | 2002-04-27 | Automatic take-off device for telephone communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02233232 CN2549665Y (en) | 2002-04-27 | 2002-04-27 | Automatic take-off device for telephone communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2549665Y true CN2549665Y (en) | 2003-05-07 |
Family
ID=33708419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02233232 Expired - Lifetime CN2549665Y (en) | 2002-04-27 | 2002-04-27 | Automatic take-off device for telephone communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2549665Y (en) |
-
2002
- 2002-04-27 CN CN 02233232 patent/CN2549665Y/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2549665Y (en) | Automatic take-off device for telephone communication | |
| CN1210930C (en) | Automatic offhook device for telephone communication | |
| CN209488581U (en) | A kind of data communication module | |
| CN208369316U (en) | Distribution based on GSM is far standby to throw communication device | |
| CN216290291U (en) | Quick charging circuit module based on gallium nitride | |
| CN218124739U (en) | AISG signal conversion line circuit | |
| CN2450839Y (en) | Cordless telephone with phone interface circuit | |
| CN216216886U (en) | Dual-mode power line carrier communication device based on Bluetooth | |
| CN2549670Y (en) | Pick-off controller of intelligent telephone | |
| CN2442310Y (en) | Data communication interface device of passive telephone line | |
| CN217388846U (en) | Visual talkback doorbell outdoor unit simulating two-wire system | |
| CN211481279U (en) | POE technology-based microscopic terminal | |
| CN209417925U (en) | A kind of intelligent data converter | |
| CN206640403U (en) | A kind of removable medium-long range wireless mobile phone charger | |
| CN2185958Y (en) | Intercom by using broadcasting line communication | |
| CN215989545U (en) | Special three-way coaxial connector for electricity utilization acquisition terminal | |
| CN221058025U (en) | Integrated sleeve | |
| CN2240214Y (en) | Theft-proof device for telephone | |
| CN201887846U (en) | Communication system utilizing ready-made telephone line | |
| CN2530408Y (en) | Communication line interface converter | |
| CN208479238U (en) | A kind of vertical mobile phone charging pile | |
| CN210380342U (en) | Intelligent charger | |
| CN202197318U (en) | Terminal | |
| CN2777862Y (en) | High reliable fixed network telephone device | |
| CN201699801U (en) | Intelligent furniture remote information transmitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: QINGHUATONGFANG STACK CO.,LTD., ROOM 2907, BUILDIN Free format text: FORMER NAME OR ADDRESS: 2670 MAILBOX, BEIJING CITY 100084 |
|
| CP03 | Change of name, title or address |
Patentee address after: 100083, Beijing, Haidian District, Beijing Tsinghua Tongfang science and Technology Square A block 2907 Tsinghua Tongfang Limited by Share Ltd Patentee address before: 100084 mailbox 2670, Beijing City |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050713 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050713 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |