CN202340258U - Transmission line interface of remote data-voice simultaneous transmission device - Google Patents
Transmission line interface of remote data-voice simultaneous transmission device Download PDFInfo
- Publication number
- CN202340258U CN202340258U CN201120479116XU CN201120479116U CN202340258U CN 202340258 U CN202340258 U CN 202340258U CN 201120479116X U CN201120479116X U CN 201120479116XU CN 201120479116 U CN201120479116 U CN 201120479116U CN 202340258 U CN202340258 U CN 202340258U
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- CN
- China
- Prior art keywords
- module
- protection circuit
- transmission line
- line interface
- input protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
The utility model specifically relates to a transmission line interface of a remote data-voice simultaneous transmission device. The transmission line interface is characterized by comprising a mutual inductor with a primary side and a secondary side, a 2/4 line conversion and echo canceling module, an input protection circuit module and an off-hook and on-hook relay module, wherein the 2/4 line conversion and echo canceling module is connected between two end lines of the mutual inductor primary side, the input protection circuit module is connected between two end lines of the mutual inductor secondary side, and the off-hook and on-hook relay module is connected between the mutual inductor secondary side and the input protection circuit module in series. The transmission line interface has the advantages of simple structure, steady and reliable performance and excellent echo canceling effect.
Description
Technical field
The utility model is specifically related to a kind of transmission line interface of remote simultaneous data and speech transmission equipment.
Background technology
Can not converse simultaneously during Common Facsimile Machine transmission data, data need be separated with speech and transmitted, and facsimile machine can only receive on the public telephone network (PSTN), and transmission medium is single;
IP phone is based on the TCP/IP procotol, and the real-time of conversation is poor, and under the communication conditions condition of poor, time-delay can appear in speech, will cause voice call to carry out when serious;
Uses DSVD MODEM to accomplish voice and be connected work, but the flexibility of design not very big like this, is fixed rate like voice rate that the transmission that this point will have influence on long distance realizes with data multiplexing demultiplexing and transmission.And because MODEM pays the utmost attention to the transmission of voice, the increase that might bring data transmission delay in this case.The DSVD Modem that is used for the PSTN net that can see in the market can only accomplish a little-connection, then also needs special multipoint control unit (MCU), general more complicated if realize the multiple spot linkage function.
The people is for addressing the above problem in application; Designed a kind of based on wired remote simultaneous data and speech transmission equipment; This equipment is realized the multiplexing packing and the demultiplexing of data, voice by CPU, and MODEM is set to data pattern, finally realizes the extraordinary full-duplex data of real-time, speech simultaneous interpretation.The said equipment adopts traditional transmission line interface, owing to receive the influence of echo, transmission rate is not high always, can't give full play to the function of equipment.
The utility model content
The purpose of the utility model is to solve traditional transmission line Application of Interface and influenced by echo to simultaneous data and speech transmission, and the defective that transmission rate is low provides a kind of Echo Cancellation function that has, the transmission line interface of the remote simultaneous data and speech transmission equipment that transmission rate is high.
The utility model is realized through following technical scheme:
It is a kind of transmission line interface of remote simultaneous data and speech transmission equipment; It is characterized in that comprising the instrument transformer, the conversion of 2/4 line and Echo Cancellation module, input protection circuit module and the dislodging machine relay module that are provided with primary side and secondary side; Said 2/4 line conversion and Echo Cancellation module are connected between two end lines of instrument transformer primary side; The input protection circuit module is connected between two end lines of instrument transformer secondary side, and dislodging machine relay module is serially connected between instrument transformer secondary side and the input protection circuit module.
When the utility model is applied in the simultaneous data and speech transmission equipment; The instrument transformer primary side is connected with the modulation module; The instrument transformer secondary side is connected with transmission line; Conversion of 2/4 line and Echo Cancellation module play an important role to systematic function, and it directly affects the maximum transmission rate that modulator-demodulator can reach.
Conversion of 2/4 line and Echo Cancellation module that the utility model adopts are prior art, and its concrete structure and principle no longer are described in detail.
The utlity model has advantage simple in structure, stable and reliable for performance, that Echo Cancellation is effective.
Description of drawings
Fig. 1 is the structural principle block diagram of the utility model.
Shown in figure: 1. modulation module; 2.2/4 line conversion and Echo Cancellation module; 3. instrument transformer primary side; 4. instrument transformer secondary side; 5. dislodging machine relay module; 6. input protection circuit module; 7. transmission line.
Embodiment
As shown in Figure 1: conversion of 2/4 line and Echo Cancellation module 2 are connected between 3 liang of end lines of instrument transformer primary side; Input protection circuit module 6 is mounted between 4 liang of end lines of instrument transformer secondary side, and dislodging machine relay module 5 is serially connected between instrument transformer secondary side 4 and the input protection circuit module 6.
When the utility model was applied in the simultaneous data and speech transmission equipment, instrument transformer primary side 3 was connected with modulation module 1, and instrument transformer secondary side 4 is connected with transmission line 7.
When work; Transmission line 7 transmits the handshake of opposite end simultaneous data and speech transmission equipment, and handshake is at first handled through input protection circuit module 6, and anti-stop signal receives environmental impacts such as thunderbolt in transmission course; Produce high-voltage noise; Input protection circuit module 6 can effectively filtering high-voltage noise, arrives dislodging machine relay module 5 through filtered handshake, and the output control signal made dislodging machine relay module 5 off-hooks after the CPU of equipment detected handshake; Both sides' equipment is set up communication link, the beginning transmission of data signals.Data-signal gets into instrument transformer secondary side 4 after 6 filtering of input protection circuit module; Utilize the Signal Spacing of instrument transformer; Effective protection back-end processing circuit produces identical, stable data signal at instrument transformer primary side 3, and this signal belongs to analog signal; Analog signal is after conversion of 2/4 line and 2 processing of Echo Cancellation module; Be converted into modulation module 1 manageable digital signal, conversion of 2/4 line and Echo Cancellation module that the utility model adopts are prior art, finally accomplish Signal Processing.Signal transmission principle is opposite with said method.
The described transmission line of the utility model is preferred but be not limited to insulate line.
Claims (1)
1. the transmission line interface of a remote simultaneous data and speech transmission equipment; It is characterized in that comprising the instrument transformer, the conversion of 2/4 line and Echo Cancellation module, input protection circuit module and the dislodging machine relay module that are provided with primary side and secondary side; Said 2/4 line conversion and Echo Cancellation module are connected between two end lines of instrument transformer primary side; The input protection circuit module is connected between two end lines of instrument transformer secondary side, and dislodging machine relay module is serially connected between instrument transformer secondary side and the input protection circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120479116XU CN202340258U (en) | 2011-11-28 | 2011-11-28 | Transmission line interface of remote data-voice simultaneous transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120479116XU CN202340258U (en) | 2011-11-28 | 2011-11-28 | Transmission line interface of remote data-voice simultaneous transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202340258U true CN202340258U (en) | 2012-07-18 |
Family
ID=46488941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120479116XU Expired - Lifetime CN202340258U (en) | 2011-11-28 | 2011-11-28 | Transmission line interface of remote data-voice simultaneous transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202340258U (en) |
-
2011
- 2011-11-28 CN CN201120479116XU patent/CN202340258U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120718 |