CN205304925U - Shortwave modem - Google Patents
Shortwave modem Download PDFInfo
- Publication number
- CN205304925U CN205304925U CN201520886726.XU CN201520886726U CN205304925U CN 205304925 U CN205304925 U CN 205304925U CN 201520886726 U CN201520886726 U CN 201520886726U CN 205304925 U CN205304925 U CN 205304925U
- Authority
- CN
- China
- Prior art keywords
- unit
- data
- nem
- rem
- signal processing
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Telephonic Communication Services (AREA)
Abstract
The utility model discloses a shortwave modem, it divide into two kinds of equipment of near -end modem (Near -end modem) and distal end modem (Remote -end modem), distal end modem and distal end shortwave radio connection, near -end modem is connected with local host computer and handle, through the mutual data of ethernet between distal end modem and the near -end modem. These two kinds of equipment all comprise parts such as serial server unit, signal processing unit and voIP gateway units. It has solved the problem that the remote control short -wave radio set was realized shortwave communication protocol, transmission numeral words, was simulated words and data, can be based on the signal automated inspection type of service that aerial receipt is got off, and the data transmission of whole IPization changes in the shortwave network deployment simultaneously. This equipment have small, the assembly is simple, can connect various short -wave radio set work, can accomplish the update of short -wave radio set under cost -effective prerequisite, has very extensive applied future in actual engineering.
Description
Technical field
The utility model discloses a kind of shortwave modem, be particularly well-suited to Remote short-wave radio set and realize short wave communication agreement, the application of transmission numeral words, simulation words and data.
Background technology
In general shortwave modem device, can not Remote short-wave radio set, closely can only connect with short-wave radio set, it is achieved basic modulation /demodulation function. And in the general remote distant equipment of short-wave radio set, simply achieve simple remotely located short-wave radio set parameter and control the transmitting-receiving of simulated voice, and unrealized long-range control radio station realizes the function such as the communication protocol such as link setup, detection and remote transmission numeral words.
Utility model content
Technical problem to be solved in the utility model is to provide one and remotely realizes short wave communication agreement, remotely controls radio station transmitting digital information, automatically identifies the remote control communication equipment of type of service.
Technical solution adopted in the utility model is: a kind of shortwave modem, including NEMVoIP gateway unit 3, NEM power subsystem 13, REMVoIP gateway unit 6 and REM power subsystem 14, it is characterised in that: also include NEM serial server unit 1, NEM signal processing unit 2, REM serial server unit 4 and REM signal processing unit 5; The command information received from host computer is resolved by NEM signal processing unit 2, and sends to NEMVoIP gateway unit 3 resolving the control command sending digital voice obtained; The simulated voice of the external microphone received is sent to NEM signal processing unit 2 by NEMVoIP gateway unit 3 according to the control command sending digital voice; The simulated voice received is carried out A/D conversion by NEM signal processing unit 2, and carries out speech coding, the data after coding is packaged into Slip bag and is sent to NEM serial server unit 1; Data after the coding received are carried out package and convert IP data to and be sent to REM serial server unit 4 through Ethernet by NEM serial server unit 1;The IP data received are resolved by REM serial server unit 4, and send to REM signal processing unit 5 resolving the serial data obtained; The serial data received is modulated by REM signal processing unit 5, forms analog data and send to REMVoIP gateway unit 6 after D/A converts; REMVoIP gateway unit 6 analog radio PTT signal, and it is sent to short-wave radio set audio port together with the analog data received; REMVoIP gateway unit 6 receives radio station from the analog data received in the air, and analog data is sent to REM signal processing unit 5; The analog data received is carried out A/D conversion by REM signal processing unit 5, and carries out waveforms detection, once waveform flag information be detected, data is demodulated, and the data after demodulation are packaged into Slip bag and are transferred to REM serial server unit 4; The data received are carried out package and convert IP data to and be sent to NEM serial server unit 1 through Ethernet by serial server unit 4; The IP data received are resolved by NEM serial server unit 1, and send to NEM signal processing unit 2 resolving the serial data obtained; The serial data received is decoded by NEM signal processing unit 2, and the formation simulated voice after D/A converts of data after decoding is sent to NEMVoIP gateway unit 3; The simulated voice that NEMVoIP gateway unit 3 receives sends to external handle;
Wherein, described NEM signal processing unit 2 is to be made up of NEMA/D, D/A converting unit 7, NEM digital signal processing unit 8 and NEM protocol control units 9. NEM protocol control units 9 receives the command information from host computer, and resolves, and is sent to NEMVoIP gateway unit 3 resolving the control command starting to send digital voice obtained; After NEMVoIP gateway unit 3 receives control command, close port 2, the simulated voice received is sent to NEMA/D, D/A converting unit 7 by port 1; Simulated voice is carried out A/D conversion by NEMA/D, D/A converting unit 7, and the data after conversion are sent to NEM digital signal processing unit 8; The data received are encoded by NEM digital signal processing unit 8, and the data after coding are packaged into Slip bag and are sent to NEM serial server unit 1; The data received are packaged into IP bag and send through Ethernet by NEM serial server unit 1; NEM serial server unit 1 receives data, resolves the IP bag received, and is sent to NEM protocol control units 9 resolving the serial data obtained; NEM protocol control units 9 resolution data bag, it has been found that after digital voice mark, sends digital voice order to NEMVoIP gateway unit 3, and sends voice data to NEM digital signal processing unit 8; After NEMVoIP gateway unit 3 receives control command, close port 2, open port 1; The voice data received is decoded by NEM digital signal processing unit 8, and the data after decoding are sent to NEMA/D, D/A converting unit 7; NEMA/D, D/A converting unit 7 carries out D/A conversion to receiving data, and simulated voice after conversion is mail to NEMVoIP gateway unit 3; 3 speeches of NEMVoIP gateway unit are sent to external handle.
Wherein, described REM signal processing unit 5 is to be made up of REMA/D, D/A converting unit 10, REM digital signal processing unit 11 and REM protocol control units 12. REM protocol control units 12 receives the data from REM serial server unit 4, resolves and starts to send the command information of digital voice, and command information is sent to REMVoIP gateway unit 6;After REMVoIP gateway unit 6 receives command information, close port 2, open port 1; REM protocol control units 12 sends voice data to REM digital signal processing unit 11; REM digital signal processing unit 11 voice data is modulated, and data after modulation are sent to REMA/D, D/A converting unit 10; REMA/D, D/A converting unit 10 data to receiving carry out D/A conversion, and the simulated voice after conversion is mail to REMVoIP gateway unit 6; REMVoIP gateway unit 6 is simulated PTT level and is sent collectively to short-wave radio set together with simulated voice; Short-wave radio set receives aerial signal, is sent to REMVoIP gateway unit 6 after downconverted; REMVOIP gateway unit 6 receives data, replicates the data received and transmits data to port 1 and port 2; REMA/D, D/A converting unit 10 receives REMVoIP gateway unit 6 and sends the simulated voice of coming, and is sent to REM digital signal processing unit 11 after A/D converts; Data are carried out waveforms detection by REM digital signal processing unit 11, if digital voice then transmitting control commands is to REM protocol control units 12; After REM protocol control units 12 receives control command, send digital voice order to REMVoIP gateway unit 6; After REMVoIP gateway unit 6 receives control command, close port 2; REM digital signal processing unit 11 sends the voice data after demodulation to REM serial server 4; REM serial server unit 4 receives the voice data after demodulation, sends through Ethernet after being packaged into IP bag.
This utility model is compared background technology and is had the advantage that
1. the high order modulation-demodulation technology that this utility model uses, advanced coding and decoding and balancing technique, it is possible to improve the performance of short-wave radio set communication.
2. the advanced Waveform Inspection Technology that this utility model uses, this technology can detect the type of service of reception information accurately.
3. the speech coding that this utility model uses separates with data modem, it is possible in locally generated numeral words information, be transferred to far-end corollary equipment by package with IP form.
4. this utility model uses serial ports switch technology and voip gateway technology, it is possible to this locality simulated voice, communication protocol and digital efficient information are transferred to far-end corollary equipment with IP form accurately.
Accompanying drawing explanation
Fig. 1 is the NEM electricity functional-block diagram of this utility model embodiment.
Fig. 2 is the REM electricity functional-block diagram of this utility model embodiment.
Fig. 3 is the electric functional-block diagram of NEM signal processing unit.
Fig. 4 is the electric functional-block diagram of REM signal processing unit.
Fig. 5 is part signaling process flow block diagram of the present utility model.
Fig. 6 is part signaling process flow block diagram of the present utility model.
Detailed description of the invention
See figures.1.and.2, this utility model is a kind of novel shortwave modem, form including NEM serial server unit 1, NEM signal processing unit 2, NEMVoIP gateway unit 3, NEM power subsystem 13, REM serial server unit 4, REM signal processing unit 5, REMVoIP gateway unit 6 and REM power subsystem 14, Fig. 1 and Fig. 2 is the electric functional-block diagram of the present invention, and embodiment presses Fig. 1 and Fig. 2 connection line. NEMVoIP gateway unit 3 receives the simulated voice of external microphone from port 3, the control command sending digital voice is received from port 1, then again simulated voice is sent to NEM signal processing unit 2 by port 1, NEM signal processing unit 2 receives simulated voice from port 2, simulated voice is carried out A/D conversion, and carry out speech coding, then 600bps vocoder data is packaged into Slip bag and is sent to NEM serial server unit 1 by port 3, NEM serial server unit 1 receives data from port 2, the data received carry out package convert IP data to and be sent to REM serial server unit 4 by port 1 through Ethernet, REM serial server unit 4 receives data from port 1, the IP data received are resolved, and send to REM signal processing unit 5 by port 2 resolving the serial data obtained, REM signal processing unit 5 receives data from port 3, the data received are modulated, it is sent to REMVoIP gateway unit 6 by port 2 after D/A converts, REMVoIP gateway unit 6 receives analog data from port 1, analog radio PTT signal, and it is sent to short-wave radio set audio port together with the analog data received by port 3,REMVoIP gateway unit 6 receives radio station from the analog data received in the air from port 3, and analog data is sent to REM signal processing unit 5 by port 1, REM signal processing unit 5 receives data from port 2, the data received are carried out A/D conversion, and carry out waveforms detection, once waveform flag information be detected, data are demodulated, and the data after demodulation are packaged into Slip bag and are transferred to REM serial server unit 4 by port 3, serial server unit 4 receives data from port 2, the data received carry out package convert IP data to and be sent to NEM serial server unit 1 by port 1 through Ethernet, NEM serial server unit 1 receives data from port 1, the IP data received are resolved, and the serial data after resolving is sent to NEM signal processing unit 2 by port 2, NEM signal processing unit 2 receives data from port 3, data are decoded, and data after decoding are sent to NEMVoIP gateway unit 3 after D/A converts, NEMVoIP gateway unit 3 receives data from port 1, the simulated voice received is sent to external handle by port 3.
It is made up of NEMA/D, D/A converting unit 7, NEM digital signal processing unit 8, NEM protocol control units 9 with reference to Fig. 3, NEM signal processing unit 2. NEM protocol control units 9 receives the command information from host computer from port 1, resolve and start to send the command information of digital voice, and the order sending digital voice is sent to NEMVoIP gateway unit 3 by port 2, NEMVoIP gateway unit 3 receives control command from port 4, close port 2, the simulated voice received is sent to NEMA/D by port 1, D/A converting unit 7, NEMA/D, simulated voice is carried out A/D conversion by D/A converting unit 7, data after conversion are sent to NEM digital signal processing unit 8, NEM digital signal processing unit 8 receives data from port 2, the data received are encoded, and the data after coding are packaged into Slip bag and are sent to NEM serial server unit 1 by port 3, NEM serial server unit 1 receives data from port 1, resolve the IP data received, and it is sent to NEM protocol control units 9 resolving the serial data obtained by port 2, NEM protocol control units 9 receives data from port 4, resolution data bag, after finding digital voice mark, digital voice order is sent to NEMVoIP gateway unit 3 by port 2, voice data is sent to NEM digital signal processing unit 8 by port 3, NEMVoIP gateway unit 3 receive order from port 4 after close port 2, open port 1, NEM digital signal processing unit 8 receives data from port 1, the voice data received is decoded, data after decoding are sent to NEMA/D by port 2, D/A converting unit 7, NEMA/D, D/A converting unit 7 carries out D/A conversion to receiving data, and simulated voice after conversion is mail to NEMVoIP gateway unit 3, NEMVoIP gateway unit 3 receives simulated voice from port 1, and speech is sent to external microphone by port 3.
It is made up of REMA/D, D/A converting unit 10, REM digital signal processing unit 11, REM protocol control units 12 with reference to Fig. 4, REM signal processing unit 5. REM protocol control units 12 receives the data from REM serial server unit 4 from port 4, resolve and start to send the command information of digital voice, and command information is sent to REMVoIP gateway unit 6 by port 2, REMVoIP gateway unit 6 receives control command from port 4, close port 2, open port 1, REM protocol control units 12 is sent voice data to REM digital signal processing unit 11 by port 3, REM digital signal processing unit 11 receives data from port 1, voice data is modulated, and data after modulation are sent to REMA/D by port 2, D/A converting unit 10, REMA/D, the D/A converting unit 10 data to receiving carry out D/A conversion, and the simulated voice after conversion is mail to REMVoIP gateway unit 6, REMVoIP gateway unit 6 receives simulated voice from port 1, and simulate PTT level and be sent collectively to short-wave radio set together with simulated voice,Short-wave radio set receives aerial signal, REMVoIP gateway unit 6 it is sent to after downconverted, REMVoIP gateway unit 6 receives data from port 3, replicate the data received and transmit data to port 1 and port 2, REMA/D, D/A converting unit 10 receives simulated voice, it is sent to REM digital signal processing unit 11 after A/D converts, REM digital signal processing unit 11 receives data from port 2, data are resolved, if digital voice is by port 1 transmitting control commands to REM protocol control units 12, voice data after demodulation is sent to REM serial server 4 by port 3, REM protocol control units 12 is received control command by port 3, digital voice order is sent to REMVoIP gateway unit 6 by port 2, after REMVoIP gateway unit 6 receives control command from port 4, close port 2, REM serial server unit 4 receives the voice data after demodulating from port 3, is sent through Ethernet by port 1 after being packaged into IP bag.
With reference to Fig. 5 and Fig. 6, signaling information of the present utility model includes: voip gateway controls signaling, short-wave radio set controls signaling and short wave communication protocol signaling. Voip gateway controls signaling and mainly controls voip gateway unit change voice link, to adapt to current type of service; Short-wave radio set controls signaling and realizes the parameter setting of short-wave radio set, reaches the purpose in remote control radio station; Short wave communication protocol signaling realizes short wave communication agreement, including detection, link setup and tear chain etc. open, thus completing remotely to control radio station to find the function of wireless link.
The direct-current working volts of two modular circuits of NEM and REM are responsible for by this utility model NEM power subsystem 13 and REM power subsystem 14, the design adopts LT1764 series voltage adjustor and LTM4601 voltage adjuster, produces corresponding+3.3V ,+2.5V and+1.8V etc. for each chip on circuit.
This utility model NEMA/D, D/A converting unit 7 and REMA/D, D/A converting unit 10 are responsible for A/D and the D/A conversion of data, and the precision of conversion can affect the quality receiving data, and the design adopts the TLV320AIC10 chip of TI company.
This utility model NEM protocol control units 9 and REM protocol control units 12 are responsible for resolving serial data and controlling VOIP gateway unit port switching, and the design adopts the microcontroller W77E516 of Winbond company.
This utility model NEM serial server unit 1 and REM serial server unit 4 have been the functions of conversion mutually between serial data and IP data, according to existing mature technology, the design adopts the EP2C35F484I8 functional realiey chip as main serial server of the CycloneII series of altera corp, arrange in pairs or groups PHY chip BCM5221 and network transformer HX1188 again, it is achieved the function of serial server.
This utility model NEMVOIP gateway unit 3 and REMVOIP gateway unit 6 are responsible for simulated voice and are packaged into IP data and the function of voice link switching, and the design adopts the terminal chip BCM1190 of Broadcom company to realize chip as the major function of VoIP; Adopting the MPC823 of Freescale company, BCM1190 is configured by primary responsibility; The MC14LC5480SD chip adopting Freescale company realizes PCM codec functions; Adopt the TQ2-5V chip of Panasonic company, mainly realize the handoff functionality of voice link.
This utility model REM digital signal processing unit 11 is responsible for the encoding and decoding of 600bps speech, amount of calculation as required, and the design adopts the TMS320C6748 chip of TI company.
The circuit of this utility model NEM digital signal processing unit 8 adopts the framework of DSP+FPGA to complete, and DSP selects the TMS320C6455 of TI company, the waveforms detection of primary responsibility signal and modulation /demodulation; FPGA selects the EP3C80F780I7N chip of the CycloneIII series of ALTERA company, and primary responsibility LDPC coding and decoding and Turbo are balanced.
The brief operation principle of this utility model is as follows:
Simulated voice mainly transmits between NEMVoIP gateway unit 3 and REMVoIP gateway unit 6; If current business is digital voice, two voip gateway unit close simulated voice link, signal processing unit 2 is responsible for speech coding, and the data after coding are sent to signal processing unit 5, data are modulated by signal processing unit 5, and the analogue signal after modulation is sent to short-wave radio set audio port; If current business is for transmission data, two voip gateway unit close simulated voice link, and data are not dealt with by signal processing unit 2, are pass-through to signal processing unit 5, data are modulated by signal processing unit 5, and the analogue signal after modulation is sent to short-wave radio set audio port.
This utility model mounting structure is as follows:
It is in the printed board of 100 �� 150mm that voip gateway unit 3 circuit devcie in Fig. 2 is arranged on one piece of length and width, it is in the printed board of 180 �� 150mm that other circuit devcie in Fig. 2 is arranged on one piece of length and width, finally, two pieces of circuit boards are connected by connector 203S-3C-2x10PG-8.5/3.0, then two pieces of printed boards are arranged in the box that length is 240 �� 210 �� 75mm, the NEM of assembly cost invention; It is in the printed board of 120 �� 150mm that voip gateway unit 6 in Fig. 3 and serial server unit 4 circuit devcie are arranged on one piece of length and width, it is in the printed board of 180 �� 150mm that other circuit devcie in Fig. 4 is arranged on one piece of length and width, finally, two pieces of circuit boards are connected by connector 203S-3C-2x10PG-8.5/3.0, then two pieces of printed boards are arranged in the box that length is 250 �� 220 �� 80mm, are assembled into REM of the present utility model.
Claims (3)
1. a shortwave modem, including NEMVoIP gateway unit (3), NEM power subsystem (13), REMVoIP gateway unit (6) and REM power subsystem (14), it is characterised in that: also include NEM serial server unit (1), NEM signal processing unit (2), REM serial server unit (4) and REM signal processing unit (5); The command information received from host computer is resolved by NEM signal processing unit (2), and sends to NEMVoIP gateway unit (3) resolving the control command sending digital voice obtained; The simulated voice of the external microphone received is sent to NEM signal processing unit (2) by NEMVoIP gateway unit (3) according to the control command sending digital voice; The simulated voice received is carried out A/D conversion by NEM signal processing unit (2), and carries out speech coding, the data after coding is packaged into Slip bag and is sent to NEM serial server unit (1); Data after the coding received are carried out package and convert IP data to and be sent to REM serial server unit (4) through Ethernet by NEM serial server unit (1); The IP data received are resolved by REM serial server unit (4), and send to REM signal processing unit (5) resolving the serial data obtained; The serial data received is modulated by REM signal processing unit (5), forms analog data and send to REMVoIP gateway unit (6) after D/A converts;REMVoIP gateway unit (6) analog radio PTT signal, and it is sent to short-wave radio set audio port together with the analog data received; REMVoIP gateway unit (6) receives radio station from the analog data received in the air, and analog data is sent to REM signal processing unit (5); The analog data received is carried out A/D conversion by REM signal processing unit (5), and carry out waveforms detection, once waveform flag information be detected, data are demodulated, and the data after demodulation are packaged into Slip bag and are transferred to REM serial server unit (4); The data received are carried out package and convert IP data to and be sent to NEM serial server unit (1) through Ethernet by serial server unit (4); The IP data received are resolved by NEM serial server unit (1), and send to NEM signal processing unit (2) resolving the serial data obtained; The serial data received is decoded by NEM signal processing unit (2), and the formation simulated voice after D/A converts of data after decoding is sent to NEMVoIP gateway unit (3); NEMVoIP gateway unit (3) sends the simulated voice received to external handle.
2. a kind of shortwave modem according to claim 1, it is characterised in that: described NEM signal processing unit (2) is to be made up of NEMA/D, D/A converting unit (7), NEM digital signal processing unit (8) and NEM protocol control units (9); NEM protocol control units (9) receives the command information from host computer, and resolves, and is sent to NEMVoIP gateway unit (3) resolving the control command starting to send digital voice obtained; After NEMVoIP gateway unit (3) receives control command, close port 2, the simulated voice received is sent to NEMA/D, D/A converting unit (7) by port 1; Simulated voice is carried out A/D conversion by NEMA/D, D/A converting unit (7), and the data after conversion are sent to NEM digital signal processing unit (8); The data received are encoded by NEM digital signal processing unit (8), and the data after coding are packaged into Slip bag and are sent to NEM serial server unit (1); The data received are packaged into IP bag and send through Ethernet by NEM serial server unit (1); NEM serial server unit (1) receives data, resolves the IP bag received, and is sent to NEM protocol control units (9) resolving the serial data obtained; NEM protocol control units (9) resolution data bag, it has been found that after digital voice mark, sends digital voice order to NEMVoIP gateway unit (3), and sends voice data to NEM digital signal processing unit (8); After NEMVoIP gateway unit (3) receives control command, close port 2, open port 1; The voice data received is decoded by NEM digital signal processing unit (8), and the data after decoding are sent to NEMA/D, D/A converting unit (7); NEMA/D, D/A converting unit (7) carries out D/A conversion to receiving data, and simulated voice after conversion is mail to NEMVoIP gateway unit (3); NEMVoIP gateway unit (3) is sent to external handle speech.
3. a kind of shortwave modem according to claim 1, it is characterised in that: described REM signal processing unit (5) is to be made up of REMA/D, D/A converting unit (10), REM digital signal processing unit (11) and REM protocol control units (12); REM protocol control units (12) receives the data from REM serial server unit (4), resolves and starts to send the command information of digital voice, and command information is sent to REMVoIP gateway unit (6);After REMVoIP gateway unit (6) receives command information, close port 2, open port 1; REM protocol control units (12) sends voice data to REM digital signal processing unit (11); REM digital signal processing unit (11) voice data is modulated, and data after modulation are sent to REMA/D, D/A converting unit (10); REMA/D, D/A converting unit (10) data to receiving carry out D/A conversion, and the simulated voice after conversion is mail to REMVoIP gateway unit (6); REMVoIP gateway unit (6) simulation PTT level is sent collectively to short-wave radio set together with simulated voice; Short-wave radio set receives aerial signal, is sent to REMVoIP gateway unit (6) after downconverted; REMVOIP gateway unit (6) receives data, replicates the data received and transmits data to port 1 and port 2; REMA/D, D/A converting unit (10) receives REMVoIP gateway unit (6) and sends the simulated voice of coming, and is sent to REM digital signal processing unit (11) after A/D converts; Data are carried out waveforms detection by REM digital signal processing unit (11), if digital voice then transmitting control commands is to REM protocol control units (12); After REM protocol control units (12) receives control command, send digital voice order to REMVoIP gateway unit (6); After REMVoIP gateway unit (6) receives control command, close port 2; REM digital signal processing unit (11) sends the voice data after demodulation to REM serial server (4); REM serial server unit (4) receives the voice data after demodulation, sends through Ethernet after being packaged into IP bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520886726.XU CN205304925U (en) | 2015-11-09 | 2015-11-09 | Shortwave modem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520886726.XU CN205304925U (en) | 2015-11-09 | 2015-11-09 | Shortwave modem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304925U true CN205304925U (en) | 2016-06-08 |
Family
ID=56438467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520886726.XU Withdrawn - After Issue CN205304925U (en) | 2015-11-09 | 2015-11-09 | Shortwave modem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306764A (en) * | 2015-11-09 | 2016-02-03 | 中国电子科技集团公司第五十四研究所 | Short-wave modem |
-
2015
- 2015-11-09 CN CN201520886726.XU patent/CN205304925U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306764A (en) * | 2015-11-09 | 2016-02-03 | 中国电子科技集团公司第五十四研究所 | Short-wave modem |
| CN105306764B (en) * | 2015-11-09 | 2018-01-30 | 中国电子科技集团公司第五十四研究所 | A kind of shortwave modem |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102185382B (en) | System and method for data communication between power distribution master station system and power distribution terminal | |
| CN106254232B (en) | Digital walkie-talkie gateway | |
| CN201804100U (en) | Acquisition terminal testing device | |
| CN205304925U (en) | Shortwave modem | |
| HK1091341A1 (en) | Network, network terminal and program for ip address management | |
| CN104467907A (en) | Repeater and information transmission method and communication module hardware ID identification method of repeater | |
| EP2234353A4 (en) | Gateway device, system, and communication method | |
| CN203466854U (en) | HDLC gateway device for rail train | |
| CN105306764A (en) | Short-wave modem | |
| CN104218975A (en) | Power line carrier communication method and information transmitting device | |
| CN103209383A (en) | Information system based on Internet of Things | |
| CN109450514A (en) | A kind of mobile communication relay based on low pressure carrier wave | |
| CN203858306U (en) | Automatic detection device for distribution network feeder terminal unit FTU | |
| CN208707996U (en) | A kind of lamp control device | |
| CN206908904U (en) | A kind of Internet of Things team control lamp illuminating system | |
| CN203233419U (en) | Power optical communication experiment device | |
| CN103108350B (en) | Based on the wireless transmission emulation mode of ethernet technology | |
| CN107770184A (en) | A kind of multi-functional multiplexer of scatter communication system | |
| CN210327619U (en) | Internet of things gateway and internet of things system | |
| CN107426254A (en) | A kind of network communication device suitable for short-wave radio set, system and method | |
| CN105591850A (en) | Control method and apparatus for intelligent household appliance and intelligent household system | |
| CN202587021U (en) | Home gateway and home electric equipment control system | |
| CN102012467A (en) | Discrimination system for breakdown failures on mainline or branch line of power grid | |
| CN104219636A (en) | Radio broadcasting system based on ZigBee protocol | |
| RU2012155881A (en) | SELF-ORGANIZING NETWORK SIMULATOR AND THE NETWORK CONSISTING OF SUCH SIMULATORS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160608 Effective date of abandoning: 20180130 |