CN205864461U - A kind of E1 protocol converter at E1 line transmission Ethernet data - Google Patents
A kind of E1 protocol converter at E1 line transmission Ethernet data Download PDFInfo
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- CN205864461U CN205864461U CN201620635155.7U CN201620635155U CN205864461U CN 205864461 U CN205864461 U CN 205864461U CN 201620635155 U CN201620635155 U CN 201620635155U CN 205864461 U CN205864461 U CN 205864461U
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Abstract
nullThis utility model relates to a kind of E1 protocol converter at E1 line transmission Ethernet data，By CPU、Two-way E1 and Ethernet protocol change-over circuit、Ethernet bridge circuit、Power-switching circuit and external interface circuit connect and compose，1 road E1 track data and the protocol conversion of ethernet line circuit-switched data is realized by every road E1 and Ethernet protocol change-over circuit，Two-way E1 and Ethernet protocol change-over circuit work independently from each other，It is independent of each other，E1 line interface has power-off protection function，E1 looped network communication is not affected during device powers down，By ethernet bridge circuit realiration 2 road E1 ethernet line and the connected network communication function of 3 road external ethernet circuits，The network management function to ethernet bridge circuit is realized by CPU，Have the technical effect that this transducer can realize 2 road E1 circuits and 3 road ethernet line linking communications functions by the protocol conversion of E1 signal and ethernet signal，Thus realize the coaxial cable utilizing E1 circuit and the data transmission channel of the highest 2.048Mbit/s is provided for ethernet device.
Description
Technical field
This utility model relates to a kind of E1 protocol converter, uses at E1 line transmission Ethernet data particularly to one
E1 protocol converter.
Background technology
2.048Mbit/s PCM digital link transmission technology is the most highly developed, in railway communication network and public affairs at present
It is widely used with in communication network.In China's Radio Train Dispatch Communication System, 2.048Mbit/s PCM digital link passes
Transferring technology is applied to the wire transmission of the data between station, ground and voice, E1 circuit network aboundresources the most on a large scale.
Some ground installation or Ethernet interface equipment in railway wireless dispatching system at present, and between some stations, region
Relatively lack ethernet line resource, special lay the relatively costly of ethernet line and maintenance, the longest, and some regions
Do not possesses the condition laying Ethernet.
Summary of the invention
In view of problem of the prior art, this utility model provides a kind of E1 agreement at E1 line transmission Ethernet data
Transducer, utilizes existing E1 circuit, as passage, ethernet device is accessed E1 network, greatly facilitates Ethernet interface
Installing and using of equipment, and save laying and the maintenance cost of ethernet line, concrete technical scheme is, a kind of at E1 circuit
The E1 protocol converter of transmission Ethernet data, changes including MCU, ethernet bridge circuit, two-way E1 and Ethernet protocol
Circuit, power-switching circuit, external interface circuit, it is characterised in that: MCU chip connects the ether of ethernet bridge circuit respectively
Network interface, the control interface of E1 protocol conversion circuitry 1 and E1 protocol conversion circuitry 2, ethernet bridge circuit connect two E1 and
The Ethernet interface of Ethernet protocol change-over circuit and 3 road RJ45 type external ethernet interface circuits, two E1 and Ethernet association
View change-over circuit connects road E1 external interface and an ethernet bridge circuit respectively, and two-way E1 and Ethernet protocol change-over circuit are all
Having non-equilibrium 75 ohm of BNC types and balance two kinds of external interfaces of 120 ohm of RJ45 types, external ethernet interface is balance 120
Ohm RJ45 type interface, power-switching circuit respectively with MCU, E1 and Ethernet protocol change-over circuit, power-switching circuit, outside
Interface circuit connects, it is provided that power supply.
Of the present utility model have the technical effect that, facilitate installing and using of Ethernet interface equipment, and save Ethernet
The laying of circuit and maintenance cost.
Accompanying drawing explanation
Fig. 1 is the internal principle schematic of this utility model；
Fig. 2 is this utility model external interface schematic diagram；
Fig. 3 is this utility model and non-equilibrium 75 ohm of E1 circuit external equipment connection diagrams；
Fig. 4 is 120 ohm of E1 circuit external equipment connection diagrams of this utility model and balance.
Detailed description of the invention
Understand this utility model in order to clearer, describe this utility model in conjunction with the accompanying drawings and embodiments in detail.
As shown in Figure 1, 2, a kind of E1 protocol converter at E1 line transmission Ethernet data (hereinafter referred to as E1 agreement
Transducer), connect including MCU, ethernet bridge circuit, two-way E1 and Ethernet protocol change-over circuit, power-switching circuit, outside
Mouth circuit, wherein MCU uses LPC1768 chip；Two-way Ethernet protocol change-over circuit all uses SE0164 chip, Ethernet net
Bridge circuit uses IP175DLFI chip, and the Ethernet interface of MCU connects the RMII interface of ethernet bridge circuit, it is achieved to
The too control management of network data and ethernet bridge circuit, two SPI interface of MCU connect E1 and Ethernet protocol conversion respectively
Circuit 1 and E1 and the control interface of Ethernet protocol change-over circuit 2, be controlled pipe to E1 and Ethernet protocol change-over circuit
Reason, ethernet bridge circuit connects outside MCU and two E1 and the Ethernet interface of Ethernet protocol change-over circuit and three respectively
Portion's Ethernet interface, it is achieved ethernet network switch function, the E1 interface of two E1 and Ethernet protocol change-over circuit is respectively
Connecting the outside E1 interface in a road, the Ethernet interface of two E1 and Ethernet protocol change-over circuit connects ethernet bridge electricity respectively
Two MII interfaces on road, power-switching circuit uses LM22670-5.0, LDO LM1117-3.3 and LM1117-1.8 chip, electricity
Power-switching circuit connects external DC12V power supply, and DC12V externally fed is converted to DC5V by LM22670-5.0 chip,
DC5V is respectively converted into DC3.3V and DC1.8V by LM1117-3.3 and LM1117-1.8 chip, and power-switching circuit is MCU, E1
Thering is provided power supply with Ethernet protocol change-over circuit, ethernet bridge circuit etc., external interface circuit uses network transformer PT22-
1161, PT21-1266A, HX1188NL and BNC type, RJ45 type adapter, network transformer PT22-1161 connects BNC type and connects
Device is as non-equilibrium 75 ohm external E1 interfaces 1, and network transformer PT21-1266A connects RJ45 type adapter as balance 120
Ohm external E1 interface 2, network transformer HX1188NL connects RJ45 type adapter and connects as external ethernet interface, outside E1
Power-failure close protection E1 line looped network function is realized by relay between data receiver and the transmitting of mouth.
As shown in Figure 3,4, E1 protocol converter when installing and using external DC12V power, outside E1 interface accesses E1 circuit,
External ethernet interface connects ethernet device.E1 protocol converter self adaptation 10M/100M ethernet device, every E1 agreement
Transducer at most can connect three ethernet devices, and E1 protocol converter is automatically obtained Ethernet data and the agreement of E1 data
Conversion, thus realize the data transmission channel using E1 circuit as ethernet device.
Claims (1)
1. at an E1 protocol converter for E1 line transmission Ethernet data, including MCU, ethernet bridge circuit, two-way
E1 and Ethernet protocol change-over circuit, power-switching circuit, external interface circuit, it is characterised in that: MCU chip connect respectively with
The too Ethernet interface of network bridge circuit, the control interface of E1 protocol conversion circuitry 1 and E1 protocol conversion circuitry 2, Ethernet net
Bridge circuit connects two E1 and the Ethernet interface of Ethernet protocol change-over circuit and 3 road RJ45 type external ethernet interface electricity
Road, two E1 and Ethernet protocol change-over circuit connect road E1 external interface and an ethernet bridge circuit respectively, two-way E1 and
Ethernet protocol change-over circuit all has non-equilibrium 75 ohm of BNC types and balance two kinds of external interfaces of 120 ohm of RJ45 types, outside
Ethernet interface is 120 ohm of RJ45 type interfaces of balance, and power-switching circuit changes electricity with MCU, E1 and Ethernet protocol respectively
Road, power-switching circuit, external interface circuit connect, it is provided that power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620635155.7U CN205864461U (en) | 2016-06-24 | 2016-06-24 | A kind of E1 protocol converter at E1 line transmission Ethernet data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620635155.7U CN205864461U (en) | 2016-06-24 | 2016-06-24 | A kind of E1 protocol converter at E1 line transmission Ethernet data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205864461U true CN205864461U (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201620635155.7U Active CN205864461U (en) | 2016-06-24 | 2016-06-24 | A kind of E1 protocol converter at E1 line transmission Ethernet data |
Country Status (1)
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| CN (1) | CN205864461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106060062A (en) * | 2016-06-24 | 2016-10-26 | 天津七二通信广播有限公司 | E1 protocol converter for transmitting Ethernet data in E1 circuit |
-
2016
- 2016-06-24 CN CN201620635155.7U patent/CN205864461U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106060062A (en) * | 2016-06-24 | 2016-10-26 | 天津七二通信广播有限公司 | E1 protocol converter for transmitting Ethernet data in E1 circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |