CN204967836U - Be applied to volume subdata terminal of PSTN public network - Google Patents
Be applied to volume subdata terminal of PSTN public network Download PDFInfo
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- CN204967836U CN204967836U CN201520687850.3U CN201520687850U CN204967836U CN 204967836 U CN204967836 U CN 204967836U CN 201520687850 U CN201520687850 U CN 201520687850U CN 204967836 U CN204967836 U CN 204967836U
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- module
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- card
- control mcu
- public network
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Abstract
The utility model discloses a be applied to volume subdata terminal of PSTN public network, the analog -to -digital conversion module input is connected with the telephone line, digit isolation mode block output end is connected with the input to the data signal modem module, the data signal modem module is passed through the UART interface and is connected with control MCU, still including the RECIEVE module that is used for the pronunciation broadcast, MIC module and two the enlarged modules that are used for the pronunciation sampling, one of them enlarged module is used for audio power amplifier, and another enlarged module is used for the signal amplification with the microphone collection, control MCU concatenate with one of them enlarged module and RECIEVE module through DAC in proper order, control MCU concatenate with another enlarged module and MIC module through ADC in proper order. The utility model discloses the smooth clear secret telephony and the transmission of secure data can be realized on ordinary PSTN, and to the multiple protection of key SD card, user's safety in utilization is improved.
Description
Technical field
The utility model relates to a kind of quantal data terminal, particularly relates to a kind of quantal data terminal being applied to PSTN public network.
Background technology
Current PSTN network is generally simulation access at client terminal, after the distributing cabinet and switch of operator, be then converted into digital signal, and wherein modulus, digital-to-analogue conversion exist distortion.This is also that the utility model adopts one of reason of digital encryption instead of analog encryption.In order to realize carrying out digital data transmission in analog line, need the modulation and demodulation carrying out digital signal.This is to the design of modulation, demodulation module and select to propose higher requirement.Existing exist based in the quantal data terminal of PSTN public network: 1) volume is comparatively large, is not suitable for and goes out to carry; 2) and other telephone plants coupling poor, tonequality is general; 3) poor to the protection of key SD card, SD card can conveniently take out, and common computer is accessed; 4) use professional audio compression chip, cost is higher, and fail safe reduces.
Utility model content
The purpose of this utility model is to provide a kind of quantal data terminal being applied to PSTN public network; be applied to the quantal data terminal of PSTN public network based on PSTN public network; the transmission of smooth secret telephony and private data clearly can be realized on common PSTN; and multiple protective is realized to key SD card, improve user's safety in utilization.
For realizing above-mentioned technical purpose, the technical scheme that the utility model is taked is: the quantal data terminal being applied to PSTN public network, the speech processes MCU comprising control MCU and be electrically connected with control MCU; It is characterized in that: also comprise the SRAM and key SD card that are connected with speech processes MCU respectively; SRAM and key SD card are all for storage key; Also comprise the charge port be connected with control MCU by USB interface; Also comprise the analog-to-digital conversion module for analog signal being transferred to digital signal, digital isolation module and be used for carrying out digital signal the digital signal modulated demodulation module of modulation and demodulation; Analog-to-digital conversion module input is connected with telephone wire; Numeral isolation module output is connected with the input of digital signal modulated demodulation module; Digital signal modulated demodulation module is connected with control MCU by UART interface;
Also comprise the RECIEVE module for speech play, the MIC module for speech sample and two amplification modules; One of them amplification module is used for audio frequency and amplifies, and the signal that another amplification module is used for microphone to gather amplifies; Control MCU is connected in series with one of them amplification module and RECIEVE module successively by DAC; Control MCU is connected in series with another amplification module and MIC module successively by ADC;
Also comprise be connected with control MCU respectively for the SD card interface of reading and writing the user file storing transmission to be encrypted for copying key, charging or as the expanding USB interface of calling party file transfer card and the LCD button for showing and operate secret terminal.
Secret terminal supporting document transmission, an open SD confession user uses, can needing the copy content of transmission on this file transfer card.
As the technical scheme that the utility model improves further, described control MCU is STM32F103VE series processors.
As the technical scheme that the utility model improves further, described speech processes MCU is STM32F205RE series processors;
As the technical scheme that the utility model improves further, SRAM and used key to delete, power down key is deleted.
As the technical scheme that the utility model improves further, the described SRAM that is connected with speech processes MCU and key SD is stuck in key and pulverizes and use hardware erase mode, wipes, and write new pseudo random number by with the storage area crossed, unreducible with the key crossed.
As the technical scheme that the utility model improves further, external USB mouth can not access key SD card, and is being supplied to also without read operation in external access interface, and SD card can only be write and can not read.
As the technical scheme that the utility model improves further, open and be SDHC card to the file transfer card of user and key SD card.
The utility model has selected the core of Modem module as data modem of technical grade, realizes in guarantee systemic-function and while stability, greatly reduces development difficulty, be beneficial to the rapid shaping of product.Modem module is selected in type selecting can the module of the several functions such as support voice, fax, data transmission, and the secrecy transmission support for digital document comprises the encrypted transmission of the type file such as document, picture.Modem module is connected by full duplex UART with rear end MCU, simple to operate.Employing " one-time pad " symmetric cryptography mode, can get double secret key call from QKD in real time and file is encrypted transmission, also can prestore key at key storage region (RAM, SD card), for going out or using without QKD place.In a word, the utility model, based on PSTN public network, can realize the transmission of smooth secret telephony and private data clearly, and realize multiple protective to key SD card, improve user's safety in utilization on common PSTN.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is CODEC software processing flow schematic diagram.
Fig. 3 upper computer software writes the schematic flow sheet of key SD card.
Embodiment
Embodiment 1
See Fig. 1, Fig. 2 and Fig. 3, the quantal data terminal of PSTN public network should be used for, the speech processes MCU comprising control MCU and be electrically connected with control MCU; Also comprise the SRAM and key SD card that are connected with speech processes MCU respectively; SRAM and key SD card are all for storage key; Also comprise the charge port be connected with control MCU by USB interface; Also comprise the analog-to-digital conversion module for analog signal being transferred to digital signal, digital isolation module and be used for carrying out digital signal the digital signal modulated demodulation module of modulation and demodulation; Analog-to-digital conversion module input is connected with telephone wire; Numeral isolation module output is connected with the input of digital signal modulated demodulation module; Digital signal modulated demodulation module is connected with control MCU by UART interface; Also comprise the RECIEVE module for speech play, the MIC module for speech sample and two amplification modules; One of them amplification module is used for audio frequency and amplifies, and the signal that another amplification module is used for microphone to gather amplifies; Control MCU is connected in series with one of them amplification module and RECIEVE module successively by DAC; Control MCU is connected in series with another amplification module and MIC module successively by ADC; Also comprise be connected with control MCU respectively for the SD card interface of reading and writing the user file storing transmission to be encrypted for copying key, charging or as the expanding USB interface of calling party file transfer card and LCD and the button for showing and operate secret terminal.Secret terminal supporting document transmission, an open SD confession user uses, can needing the copy content of transmission on this file transfer card.
Preferably, described control MCU is STM32F103VE series processors.Described speech processes MCU is STM32F205RE series processors.SRAM used key to delete, and power down key is deleted.The described SRAM that is connected with speech processes MCU and key SD is stuck in key and pulverizes and use hardware erase mode, wipes, and write new pseudo random number by by the storage area data crossed, unreducible with the key crossed.External USB mouth can not access key SD card, and external access interface is without read operation, and SD card can only be write and can not read.Open and be SDHC card to the file transfer card of user and key SD card.
The quantal data terminal that should be used for PSTN public network has two MCU, and as shown in Figure 1, one is done control use, and one is done speech processes and uses.Main control unit is the core supervisor of system cloud gray model, needs the allotment of responsible system resource, the read-write of path and memory, the detection and treatment of user interface information, the display of information.It is optional that the utility model realizes many compression bit rates, can clear call and distortion rate is lower under 5000bps code check through actual measurement, can carry out simple voice authentication.Even if in the very poor situation of communication environment, the clear call under 3000bps code check also can be supported.
For privacy product, the fail safe of key is the key of privacy product safety.Owing to adopting " one-time pad " encryption technology, as long as can ensure that the key with crossing wipes pulverizing in time, non-key is stolen does not produce harm, as long as abandon with non-key on its pairing machine, thus the fail safe of guarantee privacy product.
For quantal data terminal, the utility model supports two kinds of key storage modes, SRAM and SD card stores.SRAM power down key is deleted, and ensure that the fail safe of key.
In addition, for long-term user outside, the utility model also supports SD card key storage mode, and maximum support is to 8G key.For SD card key user, ensure the fail safe of key with the following methods:
1) on key is pulverized, the utility model hardware erase mode, wipes by the storage area data crossed, and writes new pseudo random number, unreducible with the key crossed;
2) access of external USB mouth is less than key SD card, and without read operation in external access interface, SD card can only be write and can not read;
3) key SD fastens in casing by structure, key card just can only be stolen by destroying casing, and casing is once destroyed necessarily artificially can find.
Key storage SD is stuck on common computer invisible, just can write key, and cipher key content is unidirectional not readable, only to write with the special upper computer software developed with my company after carrying out multifactor authentication only.Ensure that the safety of key SD card.
Claims (7)
1. be applied to a quantal data terminal for PSTN public network, the speech processes MCU comprising control MCU and be electrically connected with control MCU; It is characterized in that: also comprise the SRAM and key SD card that are connected with speech processes MCU respectively; SRAM and key SD card are all for storage key; Also comprise the charge port be connected with control MCU by USB interface; Also comprise the analog-to-digital conversion module for analog signal being transferred to digital signal, digital isolation module and be used for carrying out digital signal the digital signal modulated demodulation module of modulation and demodulation; Analog-to-digital conversion module input is connected with telephone wire; Numeral isolation module output is connected with the input of digital signal modulated demodulation module; Digital signal modulated demodulation module is connected with control MCU by UART interface;
Also comprise the RECIEVE module for speech play, the MIC module for speech sample and two amplification modules; One of them amplification module is used for audio frequency and amplifies, and the signal that another amplification module is used for microphone to gather amplifies; Control MCU is connected in series with one of them amplification module and RECIEVE module successively by DAC; Control MCU is connected in series with another amplification module and MIC module successively by ADC.
Also comprise be connected with control MCU respectively for the SD card interface of reading and writing the user file storing transmission to be encrypted for copying key, charging or as the expanding USB interface of calling party file transfer card and the LCD button for showing and operate secret terminal.
2. the quantal data terminal being applied to PSTN public network according to claim 1, is characterized in that: described control MCU is STM32F103VE series processors.
3. the quantal data terminal being applied to PSTN public network according to claim 1 and 2, is characterized in that: described speech processes MCU is STM32F205RE series processors;
4. the quantal data terminal being applied to PSTN public network according to claim 3, is characterized in that: SRAM and used key to delete, and power down key is deleted.
5. the quantal data terminal being applied to PSTN public network according to claim 4, it is characterized in that: the described SRAM that is connected with speech processes MCU and key SD is stuck in key and pulverizes and use hardware erase mode, wipe with the storage area crossed, and write new pseudo random number, unreducible with the key crossed.
6. the quantal data terminal being applied to PSTN public network according to claim 5, is characterized in that: external USB mouth can not access key SD card, and deletes read operation being supplied in external access interface, and SD card can only be write and can not read.
7. the quantal data terminal being applied to PSTN public network according to claim 6, is characterized in that: open and be SDHC card to the file transfer card of user and key SD card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520687850.3U CN204967836U (en) | 2015-09-07 | 2015-09-07 | Be applied to volume subdata terminal of PSTN public network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520687850.3U CN204967836U (en) | 2015-09-07 | 2015-09-07 | Be applied to volume subdata terminal of PSTN public network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967836U true CN204967836U (en) | 2016-01-13 |
Family
ID=55062873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520687850.3U Withdrawn - After Issue CN204967836U (en) | 2015-09-07 | 2015-09-07 | Be applied to volume subdata terminal of PSTN public network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204967836U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071933A (en) * | 2015-09-07 | 2015-11-18 | 安徽问天量子科技股份有限公司 | Quantum data terminal applied to PSTN public network |
| CN107306248A (en) * | 2016-04-19 | 2017-10-31 | 广东国盾量子科技有限公司 | A kind of light quantum interchanger and its communication means |
-
2015
- 2015-09-07 CN CN201520687850.3U patent/CN204967836U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071933A (en) * | 2015-09-07 | 2015-11-18 | 安徽问天量子科技股份有限公司 | Quantum data terminal applied to PSTN public network |
| CN105071933B (en) * | 2015-09-07 | 2018-02-06 | 安徽问天量子科技股份有限公司 | Quantal data terminal applied to PSTN public networks |
| CN107306248A (en) * | 2016-04-19 | 2017-10-31 | 广东国盾量子科技有限公司 | A kind of light quantum interchanger and its communication means |
| CN107306248B (en) * | 2016-04-19 | 2023-04-28 | 广东国盾量子科技有限公司 | Optical quantum switch and communication method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 241003 No. 12, Zhanghe Road, hi tech Zone, Anhui, Wuhu Patentee after: Anhui Asky Quantum Technology Co., Ltd. Address before: 241002 Anhui science and technology innovation public service center, Wuhu national hi tech Zone, Yijiang Patentee before: Anhui Asky Quantum Technology Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160113 Effective date of abandoning: 20180206 |
|
| AV01 | Patent right actively abandoned |