CN207573346U - A kind of the whole network leads to the intercom with DA compatibility one - Google Patents
A kind of the whole network leads to the intercom with DA compatibility one Download PDFInfo
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- CN207573346U CN207573346U CN201721675343.3U CN201721675343U CN207573346U CN 207573346 U CN207573346 U CN 207573346U CN 201721675343 U CN201721675343 U CN 201721675343U CN 207573346 U CN207573346 U CN 207573346U
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Abstract
A kind of the whole network of the utility model offer leads to the intercom with DA compatibility one, including public network intercommunication Transmit-Receive Unit, 400MHz wireless transmit/receive units, GPS receiver unit and bluetooth Transmit-Receive Unit；Wherein, public network intercommunication Transmit-Receive Unit is by identifying the machine SIM card adaptively corresponding network；400MHz wireless transmit/receive units modulation /demodulation 4FSK signals are simultaneously sent by antenna element or are received, and are used to implement 400MHz DA compatibility intercommunication functions；GPS receiver unit receives satellite positioning geographical location information, and timing sends geographical location information to control centre；Bluetooth Transmit-Receive Unit and bluetooth headset short haul connection, are used to implement convenience, clearly call function.The utility model combines together public network intercom and digital walkie-talkie, realizes warm, smooth human-computer interaction function；Based on Public Mobile Network technology and TDMA digital mobile communication technologies, real-time, stable, reliable function of wireless talkback is realized.
Description
Technical field
The utility model is related to a kind of intercom, specifically, being related to a kind of the whole network leads to intercommunication with DA compatibility one
Machine.
Background technology
With the development of cordless communication network and coming into operation for LTE network, people require to get over to radio communication quality
Come higher.Public network intercom system is based on the public network network platform, from group scheduling management platform, utilizes mobile 2G, 3G, 4G communication skill
Art realizes half-duplex cluster communication function in mobile communications network signal cover.User, which need not build a station, can carry out one
To one or one-to-many intercommunication call, command scheduling, collaborative work.
With existing railway line speed-raising and the Large scale construction of high-speed railway, work(existing for existing simulation Radio Train Dispatch Communication System
Can be single, frequency efficiency is low, multi-user fights for channel, standard disunity the defects of, has been unable to adaptive technique development and modern times
Change the needs of transport production, it is impossible to meet the needs of Radio Train Dispatch Communication System information transmission.
Utility model content
In place of solving above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of the whole networks to lead to and number
The intercom of mould compatibility one, the defects of to overcome in the prior art.
To achieve these goals, the utility model provides a kind of the whole network and leads to intercom with DA compatibility one, institute
It states intercom and includes antenna element, public network intercommunication Transmit-Receive Unit, 400MHz wireless transmit/receive units, GPS receiver unit, bluetooth transmitting-receiving
Unit, SIM card unit, main control unit, record storage unit button and button detection unit, color screen display unit, voice communication
Unit, camera function unit, usb data Transmit-Receive Unit and power supply unit；Wherein, public network intercommunication Transmit-Receive Unit, main control unit are swept
SIM card unit is retouched to identify the machine SIM card and result is fed back to public network intercommunication Transmit-Receive Unit, public network intercommunication Transmit-Receive Unit passes through
The adaptive corresponding network of antenna element；400MHz wireless transmit/receive units, 400MHz wireless transmit/receive units modulation /demodulation 4FSK letters
Number, 4FSK signals are sent or are received by antenna element, are used to implement 400MHz DA compatibility intercommunication functions；GPS receiver unit,
GPS receiver unit receives satellite positioning geographical location information by antenna element and is sent to main control unit, and GPS receiver unit is fixed
When to control centre send geographical location information；Bluetooth Transmit-Receive Unit, antenna element realize that short-distance wireless connects with bluetooth headset
It connects, main control unit control bluetooth Transmit-Receive Unit and bluetooth headset short haul connection are used to implement convenience, clearly call function；
Record storage unit, for storing Local Parameters, voice communication record and work log record；Button and button detection unit,
Button and button detection unit are connected to by GPIO interface on main control unit, are used to implement button detection, voice channel
Control, indicator light, key-press backlight and LCD backlight control, vibrator control；Color screen display unit, color screen display unit pass through
SPI serial line interfaces are connected on main control unit, the display operated for the intercom working condition and software；Voice communication list
Member is used to implement the voice call function of the intercom；Camera function unit, camera function unit includes camera, described
Camera cooperated with LED light compensating lamp uses, and is used to implement and true clearly camera function is carried out to site environment；Usb data is received and dispatched
Unit, computer write frequency software and connect usb data Transmit-Receive Unit by USB interface, are carried out for the intercom and computer
Communication；Power supply unit, power supply unit use lithium battery to power for the intercom, and main control unit includes D.C. regulated power supply mould
DC7.2V voltages are converted to DC3.3V voltages as main control unit and digital chip power supply by block, the D.C. regulated power supply module.
As the further explanation to intercom described in the utility model, it is preferable that the intercom includes public network pair
It says operating mode and 400MHz DA compatibility intercommunication operating modes, and duplex is supported in the case where the intercom is in stand-by state
Operation mode double standby.
As the further explanation to intercom described in the utility model, it is preferable that the intercom is in public network intercommunication
The call function and SMS function that realization is exhaled under operating mode, group is exhaled, is generally called and is promptly exhaled.
As the further explanation to intercom described in the utility model, it is preferable that when the intercom initiates a exhale,
Short-press PTT keys are conversed；When initiation group is exhaled or generally called, long-press PTT buttons are conversed；When control centre initiates promptly to exhale,
The intercom is not responding to PTT buttons and switches to reception state, to receive dispatch notification.
As the further explanation to intercom described in the utility model, it is preferable that the intercom is believed by rotating
Knob is converted to realize switching group management function in road, and edits short message and be sent to group or other intercoms or control centre.
As the further explanation to intercom described in the utility model, it is preferable that the intercom is in 400MHz numbers
Channel switching, scan channel and call function are realized under mould realizing compatibility of talkback operating mode.
As the further explanation to intercom described in the utility model, it is preferable that the intercom is believed by rotating
Knob is converted to realize channel handoff functionality in road, at most sets 16 channels, it is straight-through that each channel is set as analog channel, number
Channel or digital junction channel.
As the further explanation to intercom described in the utility model, it is preferable that the intercom will be more than two
Analog channel or digital direct channel are set as scanning channel, for working in scan channel working condition.
As the further explanation to intercom described in the utility model, it is preferable that power supply unit has cell voltage
Detection circuit, for when cell voltage is less than alarming value, carrying out the low alarm of voltage.
The utility model combines together public network intercom and digital walkie-talkie, based on embedded OS technology,
Realize warm, smooth human-computer interaction function；Based on Public Mobile Network technology and TDMA digital mobile communication technologies, realize real
When, stabilization, reliable function of wireless talkback；Based on 2G, 3G, 4G wireless network of movement, unicom, telecommunications etc., it can be achieved that the whole nation
The public network intercommunication function of the real-time intercommunication of communications and liaison；Using GPS positioning pattern, quick positioning interphone position, realizes the whole nation at any time
Monitoring；Based on TDMA digital mobile communication technologies, using DMR intercom standards, make intercom that there is 400MHz DA compatibilities pair
Pattern is said, it can be achieved that the function of talking state can be entered by pressing PTT, with more it is a exhale, group is exhaled, generally call, the DMR such as promptly exhales normal
Intercommunication function and message function are advised, communication is more reliable, and voice is apparent；Using 12.5KHz channel spacings, a channel two
Time slot effectively raises the utilization rate of frequency spectrum；Using digital encryption and authentication techniques, the safety of communication is effectively raised
Property.In mobile communications network signal cover, using management and running platform+public network mobile network+public network digital walkie-talkie
Networking model, realize half-duplex cluster communication function；User need not build a station and can carry out one-to-one or one-to-many intercommunication and lead to
The business such as words, command scheduling, collaborative work.
Description of the drawings
Fig. 1 is the overall framework figure of the intercom of the utility model.
Specific embodiment
In order to further appreciate that the structure of the utility model, feature and other purposes, in conjunction with appended preferable implementation
Example is accompanied by attached drawing, and detailed description are as follows, this attached drawing embodiment described is merely to illustrate the technical solution of the utility model, and
Non-limiting the utility model.
As shown in FIG. 1, FIG. 1 is the overall framework figures of the intercom of the utility model；The intercom includes antenna element
1st, public network intercommunication Transmit-Receive Unit 2,400MHz wireless transmit/receive units 3, GPS receiver unit 4, bluetooth Transmit-Receive Unit 5, SIM card unit
6th, main control unit 7,8 button of record storage unit and button detection unit 9, color screen display unit 10, voice communication units 11, take the photograph
As functional unit 12, usb data Transmit-Receive Unit 13 and power supply unit 14.
Public network intercommunication Transmit-Receive Unit
Public network intercommunication Transmit-Receive Unit 2 is using 2G, 3G, 4G mobile communication protocols of public networks such as compatible movement, unicom, telecommunications
The whole network leads to communication chip, and by way of automatic identification SIM card, public network intercommunication Transmit-Receive Unit 2 sends identification signal and gives master control list
Member 8, main control unit 8 scans SIM card unit 6 to identify the machine SIM card and result is fed back to public network intercommunication Transmit-Receive Unit 2, public
Net intercommunication Transmit-Receive Unit 2 realizes the public network of national communications and liaison by the adaptive corresponding mobile service carrier network of antenna element 1
Intercommunication function.
400MHz wireless transmit/receive units
400MHz wireless transmit/receive units 3 are based on TDMA communication technology, using DMR intercom standards, using baseband chip tune
System demodulation 4FSK signals, and using baseband circuit in a manner that radio circuit is combined, 4FSK signals sent by antenna element 1 or
It receives, is used to implement 400MHz DA compatibility intercommunication functions；Wherein, antenna element 1 receives 4FSK signals, 400MHz wireless receiving and dispatchings
Unit 3 demodulates 4FSK signals and is sent to main control unit 8；Alternatively, main control unit 8 sends a signal to 400MHz wireless transmit/receive units
3 are modulated to 4FSK signals, and 4FSK signals are sent again by antenna element 1.A letter may be used in the utility model intercom
The mode of two time slots in road, puies forward high-frequency utilization rate；Using digital encryption and authentication techniques, the effective safety for improving communication
Property.
GPS receiver unit
GPS receiver unit 4 is based on GPS satellite location technology, GPS satellite receiving module, GPS receiver unit built in intercom
4 receive satellite positioning geographical location information by antenna element 1 and are sent to main control unit 8, and 4 timing of GPS receiver unit
Geographical location information is sent to control centre, the location information of intercom is collected by control centre, shows the movement locus of intercom.
Control centre can realize locating and tracking, build the functions such as group, preferential assigned tasks temporarily according to the location information of each intercom.
Unexpected emergency occurs if any personnel, can also direct rescue work personnel arrival scene accurately and timely according to its GPS position information and apply
With rescue.Realize that control centre can carry out the intercom of management complete in quick positioning interphone position, realization control centre at any time
State's monitoring function.
Bluetooth Transmit-Receive Unit
Based on Bluetooth technology, antenna element 1 realizes that short-distance wireless is connect with bluetooth headset, and main control unit 8 controls bluetooth
Transmit-Receive Unit 5 and bluetooth headset short haul connection can listen to the voice messaging that intercom is received or played, be used to implement conveniently,
Clearly call function；
Record storage unit
Record storage unit 7 is based on semiconductor flash memory technology, and intercom uses high speed FLASH chip, for storing the machine
Parameter, voice communication record and work log record.
Button and button detection unit
Button and button detection unit 9 are connected to by GPIO interface on main control unit 7, are used to implement button inspection
Survey, voice channel control, indicator light, key-press backlight and LCD backlight control, vibrator control；Intercom button use environmental protection,
The silica gel push-button of resistance to pressing, the functions such as realization dials, answers, menu operation.
Color screen display unit
Color screen display unit 10 is based on SPI serial communication technologies, using high-performance, the TFT Color Liquid Crystal Displays of low-power consumption
Module, color screen display unit 10 are connected to by SPI serial line interfaces on main control unit 7, for the intercom working condition and
The display of software operation.
Voice communication units
Voice communication units 11 are based on DSP audio signal digit treatment technologies, using high-quality microphone and loudspeaker, for reality
The voice call function of the existing intercom, makes that call antijamming capability is stronger, and voice is apparent.
Camera function unit
Camera function unit 12 is used using high pixel, low-power consumption camera, the camera cooperated with LED light compensating lamp, is used
True clearly camera function is carried out to site environment in realizing.
Usb data Transmit-Receive Unit
Computer writes frequency software and connects usb data Transmit-Receive Unit 13 by USB interface, for the intercom and computer
It communicates；Realize the parameter settings such as tranmitting frequency, transmission power, receives frequency, receiving sensitivity, the threshold level of intercom
Function realizes that computer reads and remove the voice communication record of intercom storage and the function of work log record.
Main control unit
Main control unit 7 is the central hub of intercom, is responsible for each component units of connection equipment, according to corresponding agreement
Interface communicates with each component units；Analysis and video, voice, the data information of processing communication link, by setting
Function is shown, is played, is stored, is forwarded；Button, knob-operated are responded, and reliable and stable internal clocking is provided.
Main control unit CPU supports LINUX operations using being built based on ARM Cortex-A8 kernels (such as AM335X) microprocessor
System, operation dominant frequency reach as high as 1GHz, integrate IIC controllers, LCD controller, Power VR SGX530 graphics processors etc.
Function module is suitble to the application fields such as Industry Control, multimedia terminal.
Power supply unit
Power supply unit 14 uses lithium battery to power for the intercom, can select seat punching that can also select to connect by USB
Mouth charges, and lithium battery provides efficient, reliable and stable DC7.2V voltage outputs for other each units, and main control unit 8 includes
DC7.2V voltages are converted to DC3.3V voltages as main control unit 8 by D.C. regulated power supply module, the D.C. regulated power supply module
With digital chip power supply.Preferably, power supply unit 14 has battery voltage detection circuit, for being less than alarming value in cell voltage
When, carry out the low alarm of voltage.Intercom by side switch by that can inquire current battery charge, and carry out voice broadcast.Intercommunication is electromechanical
When pond electricity is low, voice and indicator light flicker alarm are carried out.
Intercom operating mode
The intercom includes public network intercommunication operating mode and 400MHz DA compatibility intercommunication operating modes, and described
Intercom is in support double working modes double standby under stand-by state.During by PTT PTT push to talk, pattern can automatic or manual choosing
It selects.It automatically selects under pattern, under conditions of having network signal, acquiescence public network intercommunication is preferential.
Public network intercommunication operating mode
Intercom is by identifying SIM card, and be switched on automatic connection network.When outside the range of network service area, intercom is shown
It goes offline and reconnects network automatically.The intercom realized under public network intercommunication operating mode exhale, group is exhaled, is generally called and promptly
The call function and SMS function exhaled.
When the intercom initiates a exhale, short-press PTT keys are conversed；By on intercom input telephone number or
Corresponding telephone number is selected to call another intercom in memory, can be conversed by PTT, display screen shows conversation object, leads to
The information such as speech phase；PTT keys are not pressed in 30 seconds or receive other side's voice messaging, end of conversation.Intercom receives calling
There is the alerting patterns selection such as vibration reminding, the tinkle of bells prompting during request, display screen shows incoming call object information.User may be selected to answer
Or not request answering.It is as described above to answer rear communication process.
When initiation group is exhaled or generally called, long-press PTT buttons are conversed；Display screen shows the letters such as conversation object, talking state
Breath；A group set up temporarily is incorporated into before one intercom booting, the group is automatically added to after booting.Intercom receives group
During group call request, there is the selection of the alerting patterns such as vibration reminding, sound prompting, display screen shows incoming call object information.User can
Selection is answered or not request answering.
In communication process, when control centre initiates promptly to exhale, the intercom is not responding to PTT buttons and switches to reception shape
State, to receive dispatch notification.Emergency help is initiated by long-press alarm keys to call, after control centre receives calling for help information, root
According to GPS positioning information, personnel are directed rescue work rapidly and carry out rescue work.
The intercom converts knob to realize switching group management function by rotated channel, and edits short message and be sent to group
Group or other intercoms or control centre.Intercom, which receives short message, has the alerting patterns such as vibration reminding, voice reminder may be selected,
Display screen shows content of short message and is stored in inbox during reception.Intercom booting after, can receive its shutdown period its
His equipment issues its short message.Intercom supports task timing reminding function, if having scheduler task in the short message received,
This scheduler task can be transferred to notepad by user.According to task time, the automatic setting alarm clock of intercom, task execution time
It arrives, sends out voice prompt automatically, user is reminded to perform task.Intercom supports the SMS function that prestores, and user may be selected to prestore short
Short message in letter is sent.Intercom supports short message store function, and all short messages sended and received can all consult, but cannot
It deletes, is recycled covering and preserves.
400MHz DA compatibility intercommunication operating modes
The intercom realizes channel switching, scan channel and call work(under 400MHz DA compatibility intercommunication operating modes
Energy.
The intercom converts knob to realize channel handoff functionality by rotated channel, at most sets 16 channels, often
A channel is set as analog channel, digital direct channel or digital junction channel.The intercom is by more than two analog channels
Or digital direct channel is set as scanning channel, for working in scan channel working condition.
The intercom compatible analog of the utility model, digital private network cluster communication and mobile public network cluster communication, realize
Analogue communication is seamlessly transitted to digital communication；Realize long range, the demand of trans-regional wireless dispatching intercommunication.
Two kinds of operating modes may be selected in the intercom of the utility model, i.e. public network intercommunication operating mode and 400MHz digital-to-analogues is simultaneous
Hold intercommunication operating mode.Public network talkback mode is based on public network wireless network, realizes unlimited distance, the real-time intercommunication work(of national communications and liaison
Energy.Digital intercom pattern realizes analogue communication seamlessly transitting to digital communication, compatible analog is normal by the way of DA compatibility
While rule business, with more exhaling based on contacts list, group is exhaled, generally call, the DMR routines intercommunication function and short such as promptly exhales
Message function.Support GPS positioning pattern, at any time quick position location, whole nation monitoring.When public network signal interrupts, intercom has
Go offline prompt facility, reconnects network function automatically.Online remote upgrade program function is realized by control centre.
It is to be understood that above-mentioned utility model content and specific embodiment are intended to prove that the utility model provides skill
The practical application of art scheme should not be construed as the restriction to scope of protection of the utility model.Those skilled in the art are in this practicality
In novel spirit and principle, when can various modifications may be made, equivalent replacement or improvement.The scope of protection of the utility model is with appended power
Subject to sharp claim.
Claims (9)
1. a kind of the whole network leads to the intercom with DA compatibility one, which is characterized in that the intercom include antenna element (1),
Public network intercommunication Transmit-Receive Unit (2), 400MHz wireless transmit/receive units (3), GPS receiver unit (4), bluetooth Transmit-Receive Unit (5), SIM
Card unit (6), main control unit (8), record storage unit (7) button and button detection unit (9), color screen display unit (10),
Voice communication units (11), camera function unit (12), usb data Transmit-Receive Unit (13) and power supply unit (14)；Wherein,
Public network intercommunication Transmit-Receive Unit (2), main control unit (8) scanning SIM card unit (6) with identify the machine SIM card and by result it is anti-
It feeds public network intercommunication Transmit-Receive Unit (2), public network intercommunication Transmit-Receive Unit (2) passes through the adaptive corresponding network of antenna element (1)；
400MHz wireless transmit/receive units (3), 400MHz wireless transmit/receive units (3) modulation /demodulation 4FSK signals, 4FSK signals are by day
Line unit (1) sends or receives, and is used to implement 400MHz DA compatibility intercommunication functions；
GPS receiver unit (4), GPS receiver unit (4) are concurrent by antenna element (1) reception satellite positioning geographical location information
Main control unit (8) is given, GPS receiver unit (4) periodically sends geographical location information to control centre；
Bluetooth Transmit-Receive Unit (5), antenna element (1) realize that short-distance wireless is connect with bluetooth headset, and main control unit (8) control is blue
Tooth Transmit-Receive Unit (5) and bluetooth headset short haul connection, are used to implement convenience, clearly call function；
Record storage unit (7), for storing Local Parameters, voice communication record and work log record；
Button and button detection unit (9), button and button detection unit (9) are connected to main control unit (8) by GPIO interface
On, it is used to implement button detection, voice channel control, indicator light, key-press backlight and LCD backlight control, vibrator control
System；
Color screen display unit (10), color screen display unit (10) are connected on main control unit (8) by SPI serial line interfaces, are used for
The intercom working condition and the display of software operation；
Voice communication units (11) are used to implement the voice call function of the intercom；
Camera function unit (12), camera function unit (12) include camera, and the camera cooperated with LED light compensating lamp uses,
It is used to implement and true clearly camera function is carried out to site environment；
Usb data Transmit-Receive Unit (13), computer write frequency software and connect usb data Transmit-Receive Unit (13) by USB interface, be used for
The intercom communicates with computer；
Power supply unit (14), power supply unit (14) use lithium battery to power for the intercom, and main control unit (8) is steady including direct current
DC7.2V voltages are converted to DC3.3V voltages as main control unit (8) sum number by piezoelectricity source module, the D.C. regulated power supply module
Word chip power supply.
2. intercom as described in claim 1, which is characterized in that the intercom include public network intercommunication operating mode and
400MHz DA compatibility intercommunication operating modes, and double working modes double standby is supported in the case where the intercom is in stand-by state
Machine.
3. intercom as claimed in claim 2, which is characterized in that the intercom is realized a under public network intercommunication operating mode
It exhales, group is exhaled, the call function that generally calls and promptly exhale and SMS function.
4. intercom as claimed in claim 3, which is characterized in that when the intercom initiates a exhale, short-press PTT keys are led to
Words；When initiation group is exhaled or generally called, long-press PTT buttons are conversed；When control centre initiates promptly to exhale, the intercom is not responding to
PTT buttons simultaneously switch to reception state, to receive dispatch notification.
5. intercom as claimed in claim 3, which is characterized in that the intercom converts knob to realize by rotated channel
Switch group management function, and edit short message and be sent to group or other intercoms or control centre.
6. intercom as claimed in claim 2, which is characterized in that the intercom is in 400MHz DA compatibility intercommunication Working moulds
Channel switching, scan channel and call function are realized under formula.
7. intercom as claimed in claim 6, which is characterized in that the intercom converts knob to realize by rotated channel
Channel handoff functionality, at most sets 16 channels, and each channel is set as analog channel, digital direct channel or digital junction letter
Road.
8. intercom as claimed in claim 7, which is characterized in that the intercom is by more than two analog channels or digital direct
Communication channel is set as scanning channel, for working in scan channel working condition.
9. intercom as described in claim 1, which is characterized in that power supply unit (14) has battery voltage detection circuit, uses
In when cell voltage is less than alarming value, the low alarm of voltage is carried out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675343.3U CN207573346U (en) | 2017-12-05 | 2017-12-05 | A kind of the whole network leads to the intercom with DA compatibility one |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675343.3U CN207573346U (en) | 2017-12-05 | 2017-12-05 | A kind of the whole network leads to the intercom with DA compatibility one |
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| CN207573346U true CN207573346U (en) | 2018-07-03 |
Family
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769811A (en) * | 2017-12-05 | 2018-03-06 | 洪泉益 | A kind of logical intercom with DA compatibility one of the whole network |
| CN110087202A (en) * | 2019-05-22 | 2019-08-02 | 唐山凯峰电子科技有限公司 | Technical grade 4G the whole network leads to short message and phone ringing alarm terminal and its alarm method |
| CN110113682A (en) * | 2019-05-27 | 2019-08-09 | 深圳市沃特沃德股份有限公司 | Audio communication method, device, computer equipment and storage medium |
| CN111083803A (en) * | 2019-12-09 | 2020-04-28 | 深圳市普天宜通技术股份有限公司 | Method and system for realizing communication between public network interphone and DMR interphone |
| CN111711781A (en) * | 2020-06-30 | 2020-09-25 | 成都零壹众科技有限公司 | Broadband talkback terminal supporting audio and video and positioning |
-
2017
- 2017-12-05 CN CN201721675343.3U patent/CN207573346U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769811A (en) * | 2017-12-05 | 2018-03-06 | 洪泉益 | A kind of logical intercom with DA compatibility one of the whole network |
| CN107769811B (en) * | 2017-12-05 | 2023-11-24 | 洪泉益 | Whole-network-communication and digital-analog compatible integrated interphone |
| CN110087202A (en) * | 2019-05-22 | 2019-08-02 | 唐山凯峰电子科技有限公司 | Technical grade 4G the whole network leads to short message and phone ringing alarm terminal and its alarm method |
| CN110113682A (en) * | 2019-05-27 | 2019-08-09 | 深圳市沃特沃德股份有限公司 | Audio communication method, device, computer equipment and storage medium |
| CN111083803A (en) * | 2019-12-09 | 2020-04-28 | 深圳市普天宜通技术股份有限公司 | Method and system for realizing communication between public network interphone and DMR interphone |
| CN111083803B (en) * | 2019-12-09 | 2023-06-23 | 深圳市普天宜通技术股份有限公司 | Method and system for realizing communication between public network interphone and DMR interphone |
| CN111711781A (en) * | 2020-06-30 | 2020-09-25 | 成都零壹众科技有限公司 | Broadband talkback terminal supporting audio and video and positioning |
| CN111711781B (en) * | 2020-06-30 | 2021-09-14 | 成都零壹众科技有限公司 | Broadband talkback terminal supporting audio and video and positioning |
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