CN1750574A - Telephone remote controller and method for far distance data communication using it - Google Patents
Telephone remote controller and method for far distance data communication using it Download PDFInfo
- Publication number
- CN1750574A CN1750574A CN 200410066308 CN200410066308A CN1750574A CN 1750574 A CN1750574 A CN 1750574A CN 200410066308 CN200410066308 CN 200410066308 CN 200410066308 A CN200410066308 A CN 200410066308A CN 1750574 A CN1750574 A CN 1750574A
- Authority
- CN
- China
- Prior art keywords
- data
- slave
- circuit
- host command
- remote control
- 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.)
- Pending
Links
Images
Landscapes
- Telephonic Communication Services (AREA)
Abstract
This invention relates to a telephone remote controller, which contains a telecommunication line, ringing check circuit, decoding circuit, and phonetic circuit, said invention features adopting RS485 interface, high frequency transformer T insulation in input interface circuit, relay S as off switch,parallelly connecting ringing check circuit in circuit and insulated by optical coupler U4, a coding sending circuit U1 whose one end connected with serial signal of CPU, another end connected with amplifier Q4. Said invention also provides a method for long distance data communication by telephone phonetic remote controller featuring using DTMF mode transmitting and receiving. Said invention has advantages of reliable DTMF signal transmitting and receiving, direct data communication with ong distance computer and active sending number calling.
Description
Technical field
The present invention relates to the method that a kind of telephone remote control and electricity consumption language voice remote control device carry out remote data communication, be the product and the method that integrate functions such as network central air-conditioning transition of communications, phone DTMF (double-tone frequently) Long-distance Control, data acquisition storage, audio alert that is applied on the domestic air conditioning unit, belong to communication network
Technical field.
Background technology
Along with science is more and more flourishing, carry out the straighforward operation air-conditioning and household electrical appliance have become the fact with phone, publication number is that 99106585.9 patent No.s are 02253932.8 utility model patent: the air-conditioner voice phone supervising device is this product, as shown in Figure 1, it is transferred to command adapted thereto by decoding after being accepted by telephone remote control by the button generation by the dtmf signal of dual-tone dialing telephone set or digital mobile phone to handle laggard line operate by CPU, CPU and output order are given sound circuit, send the audio signal that is recorded in sound circuit in advance by sound circuit and carry out the corresponding state transmission to phone, to reach the human-machine conversation control air-conditioning, the purpose of household electrical appliance etc., but because dtmf signal is isolated, the earth potential of the earth potential of telecommunication line and telephone remote control CPU altogether, at different telecommunication lines is under the different situation of voltage, has the dtmf signal distortion and causes malfunctioning; And function singleness, the dtmf signal that can only produce by the button of dual-tone dialing telephone set sends instruction, and the personnel selection ear is accepted voice signal, can not communicate with computer, can not realize that initiatively the signaling dial-up is with the voice mode warning function.
Summary of the invention
The objective of the invention is to invent a kind of reliable reception that guarantees dtmf signal and transmission, can be directly and remote computer carry out the telephone remote control of data communication, initiatively signaling dial-up and the method that electricity consumption language voice remote control device carries out remote data communication.
For realizing above purpose, technical scheme of the present invention provides a kind of telephone remote control, and it comprises a telecommunication line interface, ring detecting circuit, decoding circuit, sound circuit, it is characterized in that, adopts the RS485 interface; Described telecommunication line input interface circuit is isolated with high frequency transformer, and with relay as the off-hook switch, ring detecting circuit in parallel on the circuit, and use light-coupled isolation; Be equipped with a signaling circuit, described signaling circuit one end is connected with the serial signal of CPU, and the other end is connected with amplifier.
A kind ofly carry out the method for remote data communication with telephone remote control, it is characterized in that, data are sent and receive with the DTMF mode, after telephone remote control received Host Command, slave thought and passes order down effectively, sent set state immediately after receiving order.
The present invention adopts the audio frequency isolating transformer that the circuit input is isolated with cpu circuit, it is 1/2VCC that cpu power VCC is biased voltage by the resistance pair amplifier, without any influence, it is malfunctioning not cause that distortion causes to dtmf signal for the height of telecommunication line common-battery voltage like this.
The telecommunication line input interface circuit is isolated with high frequency transformer, and with relay as the off-hook switch, ring detecting circuit in parallel on the circuit, and use light-coupled isolation, the mixed signal of direct current common-battery voltage on the telecommunication line and DTMF is after isolating like this, filtering DC component, have only to exchange dtmf signal and input to decoding circuit, the voltage height of telecommunication line to decoding circuit without any influence.Amplifying circuit to voice adopts independent power supply VCC, and the 1/2VCC bias voltage is set, and voice exchanging high-frequency signal by the transformer coupled telecommunication line that arrives, make people's ear hear the voice suggestion sound of high-fidelity after amplifying.
The present invention increases a signaling circuit, the data transaction that needs is sent by CPU becomes the key set code (0～9, #, *) of telecommunication standard to give the signaling circuit, the signaling circuit converts key set code to dtmf signal and gives amplifying circuit through capacitive coupling, and through the transformer coupled telecommunication line that arrives, described like this telephone remote control just can be realized the modulation function of DTMF/RS485, can realize directly carrying out data communication, and can realize active signaling dial feature with computer.
Advantage of the present invention is:
1. utilize telephone line can transmit the principle of dtmf signal, data are sent and receive with the DTMF mode, make voicefrequency circuit can have the function of data communication simultaneously;
2. can guarantee the reliable reception and the transmission of dtmf signal;
3. synthetic carry out the function of modulation/RS485 signal converting that the DTMF data double-way transmits by telephone line, make this telephone remote control again can be directly and remote computer carry out data communication.
4. initiatively signaling dialing makes controlled device initiatively signaling dial-up when breaking down, and reports to the police with voice mode, and telephone remote control also has two tunnel expansions to report to the police, and is respectively fire alarm and burglar alarm.
Description of drawings
Fig. 1 is an original call remote control circuitry block diagram representation;
Fig. 2 is a circuit block diagram schematic diagram of the present invention;
Fig. 3 is circuit theory diagrams of the present invention;
Fig. 4 is the connection layout of the present invention and computer long distance communication.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Shown in Fig. 2,3, be circuit block diagram schematic diagram of the present invention and circuit theory diagrams, CN4 is the circuit-line input; CN1 is telephone set and interface; S1 is a switch, can manually carry out and the suiting of circuit; C1, D1 transfer digital signal for detecting ringing waveform to after U4 isolates, handle for the CPU metering and use; T1 is an isolating transformer, and the dtmf signal of telecommunication line is coupled effective alternating current component and amplifies the back to decoding circuit U2, signaling circuit U 1, sound circuit U3 through Q4 and arrive outside telecommunication line by transformer coupled after transformer isolation; J1 is an offhooking relay, and as bell signal counting back or need initiatively to dial and cry when reporting to the police, CPU drives J1 and carries out off-hook, and when off-hook, relay is connected, and it is direct and connect to be equivalent to elementary dc impedance 200 Ω of isolating transformer.
Described signaling circuit U 1 is encoded the serial signal of CPU, and in the dtmf signal mode after C12 coupling Q4 amplifies, send to outside telecommunication line.
Described decoding circuit U2 decodes through C19 the telecommunications dtmf signal after straight, decoded telecommunications key set code is transferred to digital signal for the CPU analyzing and processing.
Described sound circuit U3, the digital signal instruction according to CPU sends the voice that each section recorded in advance respectively, after C18 coupling Q4 amplifies, sends to outside telecommunication line.
Described U10 is the RS485 drive circuit, is the interface circuit of data passes between CPU and controlling object.
Carry out the method for remote data communication with telephone remote control, promptly data are sent and receive with the DTMF mode, after telephone remote control (slave) receives Host Command, think and pass order down effectively, send set state immediately after receiving order, make and adopt the communication data agreement to be in this way: adopt telecommunications audio interface mode; The DTMF data format; 5 byte per second speed;
One communication mode
The passive transmission set state of telephone remote control (slave).After telephone remote control (slave) received Host Command, slave is thought to pass down ordered effectively, sends set state immediately after the reception order.
Two, protocol format
(1) Host Command frame 1 form
| Send sequence number | Content | Definition | Send byte number |
| 1 | Frame head | * | 1 |
| 2 | Host Command | Command word | 5 |
| 3 | Host Command | ||
| 4 | Host Command | ||
| 5 | Host Command | ||
| 6 | Host Command | ||
| 7 | Postamble | # | 1 |
The command word definition:
1,3,5,15,15---represents to read the slave sequence number;
1,3,1,15,15---represents to read the slave current status data;
1,3,2,15,15---represents to read the slave historical state data;
1,3,3,15,15---represents to read slave accumulative total service data;
1,3,4,15,15---represents to read slave parameter 1;
1,3,6,15,15---represents to read slave parameter 2;
2,3,1,15,15---is to slave start operation;
2,3,2,15,15---is to the slave power-off operation;
2,3,3,15,15---is to from machine operation 1;
2,3,4,15,15---is to from machine operation 2;
2,3,5,15,15---is to from machine operation 3;
(2) Host Command frame 2 forms
| Send sequence number | Content | Definition | Send byte number |
| 1 | Frame head | * | 1 |
| 2 | Host Command | Command word | 5 |
| 3 | Host Command | ||
| 4 | Host Command | ||
| 5 | Host Command |
| 6 | Host Command | ||
| 7 | Parameter number | 0 ~ 9 high position | 1 |
| 8 | Parameter number | 0 ~ 9 low level | 1 |
| 9 | Numerical value | High-order | 1 |
| 10 | Numerical value | Low level | 1 |
| 11 | Postamble | # | 1 |
The command word definition:
4,3,1,14,14---represents to write the slave parameter;
For example:
No. 8 parameter of slave is made as 45:*, and 4,3,1,14,14,0,8,4,5, #
(3) slave response frame form
| Send sequence number | Content | Definition | Send byte number |
| 1 | Frame head | * | 1 |
| 2 | The data class type-word | The class type-word | 3 |
| 3 | The data class type-word | ||
| 4 | The data class type-word | ||
| 5 | Data length | Follow-up transmission length | 2 |
| 6 | Data length | ||
| 7 | Data 1 | Data 1 | 2 |
| 8 | Data 1 | ||
| 9 | Data 2 | Data 2 | 2 |
| 10 | Data 2 | ||
| 11 | Data 3 | Data 3 | 2 |
| 12 | Data 3 | ||
| 14 | Data 4 | Data 4 | 2 |
| 15 | Data 4 | ||
| 16 | Data 5 | Data 5 | 2 |
| 17 | Data 5 | ||
| 18 | Data 6 | Data 6 | 2 |
| 19 | Data 6 | ||
| 20 | Postamble | # | 1 |
(3) all slave response datas are double byte
The definition of data class type-word:
6,0,3---represents to transmit the slave sequence number;
2,1,9---represents to transmit the slave current status data;
3,1,9---represents to transmit the slave historical state data;
4,0,9---represents to transmit slave accumulative total service data;
5,1,7---represents to transmit slave parameter 1;
5,1,8---represents to transmit slave parameter 2;
(4) a certain bit representation a certain road DI/DO state of DI/DO state byte after with binary expansion, this position are that 1 expression output relay action or input switch disconnect, and are that 0 expression output relay does not move or the input switch closure.For example: the 3rd bit representation 2# compressor start-stop state of DO output state double byte.
Three. form is explained
(1) frame head
*＝“11”
(2) Host Command/slave response
The data implication: the order that main frame sends, slave is replied order.
Data type: DTMF sign indicating number, byte.
(3) postamble
#＝“12”
Four. fault and error correction
(1) packet provide packet header, bag tail, verification and etc. the verification means.
(2) main frame exceeds to send 3 callings of shaking hands to slave, and failure is then abandoned.
Five. the main frame repetitive instruction
Main frame as the same with last time, then can use repetitive instruction " * " when sending instruction.3PH-260 telephone remote control communication format is:
1, reads sequence number
Send: 11,1,3,5,15,15,12
Receive: 11,6,0,3,0,6, S1, S2, S3, S4, S5, S6,12
2, read temperature
Send: 11,1,3,1,15,15,12
Receive: 11,2,1,9,3,8, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D30, D31, D32, D33, D34, D35, D36, D37, D38,12
3, read historical data
Send: 11,1,3,2,15,15,12
Receive: 11,3,1,19,3,8, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D30, D31, D32, D33, D34, D35, D36, D37, D38,12
4, read the cumulative time
Send: 11,1,3,3,15,15,12
Receive: 11,4,0,9,1,8, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18,12
5, read parameter
Send: 11,1,3,4,15,15,12
Receive: 11,5,1,7,3,4, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D30, D31, D32, D33, D34,12
Embodiment 1: operate the central air-conditioning unit with phone
General external call is squeezed into, and after the ring 5 times (can set 1～9 time), telephone remote control is replied, and uses voice prompt operation.If one one of party-line connects, then telephone remote control does not response.Process is: " you are good, and the computer person on duty please input password ", → correct ", revising setting " by 2 by 1 operating air conditioner, → " asking the input operation instruction ", → " your instruction is accepted, and thanks use to ask on-hook ".As the password input error, then " your input error thanks use to ask on-hook in prompting.”
Example: " pressing 1 operating air conditioner " → " asking the input operation instruction " → input 0～16 (room number, 0 is whole rooms)+#+1 or 2 (start shooting or shut down) is for opening or closing air-conditioning.If above numerical value is set correct, verbal cue " your instruction is accepted, thanks use to ask on-hook ".If also think to operate, please by " 1 ", the language indication " is asked the input operation instruction " again.
Embodiment 2: after the central air-conditioning fault, and active dialing alarm process
The machine group number of all forming when each telephone remote control dispatches from the factory by one 6 figure place, when in a single day this unit breaks down, telephone remote control can be automatically by the predefined repair call of user, the maintenance telephone that is generally the air-conditioning manufacturer is called out, behind maintenance department's off-hook, telephone remote control with voice mode report to the police " * * * * * * number unit takes place * * number fault, he please overhauls ".After maintenance department hears prompting, can contrast " the fault code name table of comparisons " easily and learn what fault has taken place certain unit, and with reasonable approach air-conditioning be keeped in repair in the fastest mode.
Embodiment 3: computer remote is monitored in real time
As shown in Figure 4, connection layout for the present invention and computer long distance communication, the air-conditioning unit is connected with telephone line 2, communication data adapter 3 and computer 4 by telephone remote control 1, computer 4 becomes DTMF mode called telephone remote controller 1 to instruction transformation by communication network, play voice behind telephone remote control 1 off-hook, process is: " you are good, and the computer person on duty please input password ", → computer 4 sends data communication instruction in the DTMF mode.Telephone remote control 1 changes in the DTMF mode and transmits data, so just can be anywhere to the air-conditioning unit control in real time, remote debugging and maintenance, improved automaticity, and can in time find the unit fault, carry out remote analysis, judgement, improve the quality of air-conditioning unit after-sale service and reduce maintenance cost and the raising reliability.
Claims (7)
1. telephone remote control, it comprises a telecommunication line, ring detecting circuit, decoding circuit, sound circuit, it is characterized in that, adopts the RS485 interface; Described telecommunication line input interface circuit is isolated with high frequency transformer T, and with relay S as the off-hook switch, ring detecting circuit in parallel on the circuit, and isolate with optocoupler U4; Be provided with a signaling circuit U 1, described signaling circuit U 1 one ends are connected with the serial signal of CPU, and the other end is connected with amplifier Q4.
2. telephone remote control according to claim 1 is characterized in that, described signaling circuit U 1 is encoded the serial signal of CPU, and in the dtmf signal mode after C12 coupling Q4 amplifies, send to outside telecommunication line.
3. telephone remote control according to claim 1 is characterized in that, described decoding circuit U2 decodes through C19 the telecommunications dtmf signal after straight, decoded telecommunications key set code is transferred to digital signal for the CPU analyzing and processing.
4. telephone remote control according to claim 1 is characterized in that, described sound circuit U3, and the digital signal instruction according to CPU sends the voice that each section recorded in advance respectively, after C18 coupling Q4 amplifies, sends to outside telecommunication line.
5. telephone remote control according to claim 1 is characterized in that described U10 is the RS485 drive circuit, is the interface circuit of data passes between CPU and controlling object.
6. one kind is carried out the method for remote data communication with telephone remote control, it is characterized in that, data are sent and receive with the DTMF mode, and after telephone remote control received Host Command, slave thought and pass order down effectively, sends set state immediately after receiving order.
7. according to claim 6ly a kind ofly carry out the method for remote data communication, it is characterized in that, make and adopt the communication data agreement to be in this way: adopt telecommunications audio interface mode with telephone remote control; The DTMF data format; 5 byte per second speed;
One communication mode
The passive transmission set state of 3PH-260 telephone remote control (slave).After telephone remote control (slave) received Host Command, slave is thought to pass down ordered effectively, sends set state immediately after the reception order.
Two, protocol format
(1) Host Command frame 1 form
Send sequence number Content Definition Send byte number
1 Frame head * 1
2 Host Command Command word 5
3 Host Command
4 Host Command
5 Host Command
6 Host Command
7 Postamble # 1
The command word definition:
1,3,5,15,15---represents to read the slave sequence number;
1,3,1,15,15---represents to read the slave current status data;
1,3,2,15,15---represents to read the slave historical state data;
1,3,3,15,15---represents to read slave accumulative total service data;
1,3,4,15,15---represents to read slave parameter 1;
1,3,6,15,15---represents to read slave parameter 2;
2,3,1,15,15---is to slave start operation;
2,3,2,15,15---is to the slave power-off operation;
2,3,3,15,15---is to from machine operation 1;
2,3,4,15,15---is to from machine operation 2;
2,3,5,15,15---is to from machine operation 3;
(2) Host Command frame 2 forms
Send sequence number Content Definition Send byte number
1 Frame head * 1
2 Host Command Command word 5
3 Host Command
4 Host Command
5 Host Command
6 Host Command
7 Parameter number 0 ~ 9 high position 1
8 Parameter number 0 ~ 9 low level 1
9 Numerical value High-order 1
10 Numerical value Low level 1
11 Postamble # 1
The command word definition:
4,3,1,14,14---represents to write the slave parameter;
For example:
No. 8 parameter of slave is made as 45:*, and 4,3,1,14,14,0,8,4,5, #
(3) slave response frame form
Send sequence number Content Definition Send byte number
1 Frame head * 1
2 The data class type-word The class type-word 3
3 The data class type-word
4 The data class type-word
5 Data length Follow-up transmission length 2
6 Data length
7 Data 1 Data 1 2
8 Data 1
9 Data 2 Data 2 2
10 Data 2
11 Data 3 Data 3 2
12 Data 3
14 Data 4 Data 4 2
15 Data 4
16 Data 5 Data 5 2
17 Data 5
18 Data 6 Data 6 2
19 Data 6
20 Postamble # 1
(3) all slave response datas are the double byte definition
The definition of data class type-word:
6,0,3---represents to transmit the slave sequence number;
2,1,9---represents to transmit the slave current status data;
3,1,9---represents to transmit the slave historical state data;
4,0,9---represents to transmit slave accumulative total service data;
5,1,7---represents to transmit slave parameter 1;
5,1,8---represents to transmit slave parameter 2;
(4) a certain bit representation a certain road DI/D0 state of DI/DO state byte after with binary expansion, this position are that 1 expression output relay action or input switch disconnect, and are that 0 expression output relay does not move or the input switch closure.For example: the 3rd bit representation 2# compressor start-stop state of D0 output state double byte.
Six. form is explained
(1) frame head
*＝“11”
(2) Host Command/slave response
The data implication: the order that main frame sends, slave is replied order.
Data type: DTMF sign indicating number, byte.
(4) postamble
#＝“12”
Seven. fault and error correction
(1) packet provide packet header, bag tail, verification and etc. the verification means.
(2) main frame exceeds to send 3 callings of shaking hands to slave, and failure is then abandoned.
Eight. the main frame repetitive instruction
Main frame as the same with last time, then can use repetitive instruction " * " when sending instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066308 CN1750574A (en) | 2004-09-13 | 2004-09-13 | Telephone remote controller and method for far distance data communication using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066308 CN1750574A (en) | 2004-09-13 | 2004-09-13 | Telephone remote controller and method for far distance data communication using it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1750574A true CN1750574A (en) | 2006-03-22 |
Family
ID=36605826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410066308 Pending CN1750574A (en) | 2004-09-13 | 2004-09-13 | Telephone remote controller and method for far distance data communication using it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1750574A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916912A (en) * | 2011-08-03 | 2013-02-06 | 富泰华工业（深圳）有限公司 | Digital communication device |
| CN103388874A (en) * | 2012-05-09 | 2013-11-13 | 珠海格力电器股份有限公司 | Control method for debugging commercial air conditioning system in AT-like instruction form |
| CN104791940A (en) * | 2014-01-21 | 2015-07-22 | 海尔集团公司 | Multi-online indoor unit and outdoor unit wireless communication method and multiple online |
| CN106502722A (en) * | 2016-09-27 | 2017-03-15 | 深圳瀚星翔科技有限公司 | A kind of method and device of electronic atomization device control system upgrading |
-
2004
- 2004-09-13 CN CN 200410066308 patent/CN1750574A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916912A (en) * | 2011-08-03 | 2013-02-06 | 富泰华工业（深圳）有限公司 | Digital communication device |
| CN102916912B (en) * | 2011-08-03 | 2017-04-12 | 富泰华工业（深圳）有限公司 | Digital communication device |
| CN103388874A (en) * | 2012-05-09 | 2013-11-13 | 珠海格力电器股份有限公司 | Control method for debugging commercial air conditioning system in AT-like instruction form |
| CN103388874B (en) * | 2012-05-09 | 2015-08-12 | 珠海格力电器股份有限公司 | Control method for debugging commercial air conditioning system in AT-like instruction form |
| CN104791940A (en) * | 2014-01-21 | 2015-07-22 | 海尔集团公司 | Multi-online indoor unit and outdoor unit wireless communication method and multiple online |
| CN106502722A (en) * | 2016-09-27 | 2017-03-15 | 深圳瀚星翔科技有限公司 | A kind of method and device of electronic atomization device control system upgrading |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106789133A (en) | A kind of new digital conference system | |
| CN104410759A (en) | Digital speech communication device for elevator and communication method | |
| CN1750574A (en) | Telephone remote controller and method for far distance data communication using it | |
| CN107302410B (en) | Automatic networking instant messaging broadcasting system for production workshop subareas | |
| CN102857652B (en) | Mobile network-based switch control system and method | |
| CN203251370U (en) | Visual intercom system | |
| CN103402039B (en) | A kind of remote control system of household electrical appliance and method | |
| CN207264552U (en) | A kind of Portable safety protection intelligent alarm device and system | |
| CN103856649A (en) | Household appliance remote control system based on telephone | |
| CN207968551U (en) | A kind of industrial network type Wireless explosion-proof public address system | |
| CN201004650Y (en) | Home network gateway | |
| CN207802224U (en) | A kind of explosion-proof phone system | |
| CN101110710A (en) | Acousto-optic warning system of mobile system network element | |
| CN204029076U (en) | A kind of printing press voice prompt alarm system | |
| CN203233473U (en) | Tunnel emergency communication system | |
| CN202798901U (en) | Fire protection telephone switchboard, extension and system | |
| CN203191800U (en) | Remote control system | |
| CN2728119Y (en) | Remote controller for telephone | |
| CN208207563U (en) | Urban rail dtmf key disk remote decoder circuit | |
| CN1210528C (en) | Voice telephone monitoring system for air conditioner | |
| CN110708221A (en) | Household remote control system and method | |
| CN2903795Y (en) | Telephone remote control water heater | |
| CN116668350B (en) | Communication terminal of digital private network and matched encryption component detection system and method | |
| CN205942292U (en) | Intelligent household remote control system | |
| CN102447483B (en) | Voice terminal of emergency communication system based on wire telephone network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |