CN107809318B

CN107809318B - Method for adding POE function to equipment

Info

Publication number: CN107809318B
Application number: CN201711184677.5A
Authority: CN
Inventors: 姚欣; 徐巍; 徐捷; 刘强强; 孙普
Original assignee: China Telecom Corp Ltd Yangzhou Branch
Current assignee: China Telecom Corp Ltd Yangzhou Branch
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2020-06-16
Anticipated expiration: 2037-11-23
Also published as: CN107809318A

Abstract

The invention discloses a method for adding a POE function to equipment, and belongs to the technical field of power supply of electronic equipment. A method for adding POE function to equipment, through equipment circuit transformation and adding external module, makes the original electronic equipment without POE function possess POE power supply function, and under the condition of not adding POE exchanger, not changing network structure, realizes POE power supply connection of two equipment. The invention does not need to replace equipment without POE function, does not need to increase a POE exchanger, and saves equipment investment; the original network structure is not changed, and the network function is built quickly.

Description

Method for adding POE function to equipment

Technical Field

The invention relates to a power supply technology of electronic equipment, in particular to a method for adding a POE function to the equipment.

Background

Poe (power Over ethernet) refers to a technology that can provide dc power for some IP-based terminals (such as IP phones, wireless lan access points AP, network cameras, etc.) while transmitting data signals for such devices, without any modification to the existing ethernet cat.5 wiring infrastructure. The POE technology can ensure the safety of the existing structured wiring and ensure the normal operation of the existing network, thereby reducing the cost to the maximum extent.

The standard five-type network has 8 pins for four twisted pairs, but only two of these pairs are used in l0M BASE-T and 100M BASE-T to transmit and receive data, the others being reserved for telephony.

If the RJ-45 connector is held against itself with the latch facing upward, the pins are numbered from left to right by 1 to 8. The purpose of each pin according to the TIA/EIA568 specification is as follows:

1 output data (+)

2 output data (-)

3 input data (+)

4 reserved for telephone use

5 reserved for telephone use

6 input data (-)

7 reserved for telephone use

8 reserved for telephone use

Either the reserved line pair or the data line pair can be used for PoE powering. The PoE standard defines two methods for delivering dc power to PoE-compliant devices using ethernet transmission cables:

1. folding intermediate crossing method (Mid-Span): as shown in fig. 1, the spare wire pairs that are not used in the ethernet cable are used to transmit dc power, and are used between a general switch and network terminal equipment, and power can be supplied to the network terminal equipment through the network wire. It has two RJ45 jacks for each port, one connected to the switch by a stub and the other connected to remote equipment.

2. Folding End-Span (End-Span): as shown in fig. 2, dc power is simultaneously transmitted on the core used for data transmission, which power transmission uses a different frequency than the ethernet data signal. The corresponding Endpoint PSE (power sourcing equipment) has an ethernet switch, router, hub or other network switching device that supports POE functionality. It is anticipated that End-Span will rapidly become widespread, since ethernet data and power transmission use common line pairs, thus eliminating the need to provide dedicated lines for independent power transmission, which is particularly significant for cables with only 4 cores and matched standard RJ-45 sockets.

The closest patent applications:

(1) POE power supply-201410439098.0

(2) POE power supply device-201610255926.4

Above patent application all is for the equipment power supply that possesses the POE function, can't let the equipment that does not possess the POE function realize the POE power supply, and needs increase POE power supply unit, probably changes original network structure. The problem that the power supply condition is not available at the electronic equipment can be solved by the POE function, but the POE function is not considered when some electronic equipment is produced, and the field use requirement cannot be met.

Disclosure of Invention

The invention aims to provide a method for adding a POE function to equipment, which adds the POE function to the original electronic equipment without the POE function and realizes the POE power supply between the original electronic equipment without the POE function under the conditions of not adding a POE exchanger and not changing the original network structure.

The invention aims to realize the method for adding the POE function to the equipment, which is realized by the technical scheme that the original electronic equipment without the POE function has the POE power supply function through the equipment circuit transformation and the addition of the external module, and the POE power supply connection of the two pieces of equipment is realized under the conditions of not adding a POE exchanger and not changing a network structure.

Preferably, the specific implementation manner of the increasing method is as follows:

(1) transforming an original equipment circuit, connecting

pins

4 and 5 of a circuit network port of the original equipment with a positive input electrode of a direct-current power supply, and connecting

pins

7 and 8 of the circuit network port of the original equipment with a negative input electrode of the direct-current power supply;

(2) checking the direct-current power supply parameters of the electronic equipment with the power supply condition and the direct-current power supply parameters of the equipment needing POE power supply, wherein the direct-current power supply parameters of the electronic equipment with the power supply condition comprise direct-current voltage V1 and direct current A1, and the direct-current power supply parameters of the equipment needing POE power supply comprise direct-current voltage V2 and direct current A2;

(3) the electronic equipment with the power supply condition is powered by a power supply with an output direct current voltage of V1 and an output direct current of not less than (A1+ A2V 2/V1);

if V2= V1, the POE power supply is realized by directly using the network cable connection equipment;

if V2 is greater than V1, a voltage boosting circuit module is manufactured by using an MC34063 chip between two devices, the input voltage is V1, the output voltage is V2, the input end is connected with a power supply device network cable, and the output end is connected with a remote device network cable, so that POE power supply is realized;

if V2 < V1, use MC34063 chip preparation step-down circuit module between two equipment, input voltage is V1, and output voltage is V2, and the input is connected the power supply unit net twine, and the remote equipment net twine is connected to the output, realizes POE power supply.

Preferably, if the length of the network cable is greater than 50 meters, which results in a large voltage drop after transmission, the output voltage of the buck-boost module can be properly increased according to field test conditions to compensate transmission attenuation.

Compared with the prior art, the invention has the beneficial effects that:

firstly, equipment without POE function does not need to be replaced, a POE exchanger does not need to be added, and equipment investment is saved;

secondly, the original network structure is not changed, and the network function is built quickly;

and thirdly, the method has great practical value for realizing specific functions, devices which are difficult to replace and environments in which the network structure cannot be changed.

Drawings

FIG. 1 is a schematic diagram of a prior art folding gap bridge;

FIG. 2 is a schematic diagram of a prior art fold end crossing process;

FIG. 3 is a circuit modification diagram of an electronic device according to the present invention;

FIG. 4 is a circuit diagram of a boost module according to the present invention;

fig. 5 is a circuit diagram of the voltage reduction module according to the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 3-5, the invention uses the principle of POE power supply, and by modifying and adding the external module to the device circuit, the electronic device without POE function has the POE power supply function, and the POE power supply connection between the two devices is realized without adding a POE switch and changing the network structure. The specific implementation mode is as follows:

1. transforming an original equipment circuit, connecting

pins

4 and 5 of a network port with the input anode of a direct-current power supply, and connecting

pins

7 and 8 of the network port with the input cathode of the direct-current power supply;

2. checking the direct-current power supply parameters (direct-current voltage V1 and direct current A1) of the electronic equipment with power supply conditions and the direct-current power supply parameters (direct-current voltage V2 and direct current A2) of the equipment needing POE power supply;

3. the electronic equipment with the power supply condition is powered by a power supply with an output direct current voltage of V1 and an output direct current of not less than (A1+ A2V 2/V1);

4. if V2= V1, the POE power supply is realized by directly using the network cable connection equipment;

5. if V2 is greater than V1, a voltage boosting circuit module is manufactured by using an MC34063 chip between two devices, the input voltage is V1, the output voltage is V2, the input end is connected with a power supply device network cable, and the output end is connected with a remote device network cable, so that POE power supply is realized;

6. if V2 is less than V1, a voltage reduction circuit module is manufactured by using an MC34063 chip between two devices, the input voltage is V1, the output voltage is V2, the input end is connected with a power supply device network cable, and the output end is connected with a remote device network cable, so that POE power supply is realized;

7. if the length of the network cable is more than 50 meters, the voltage drop after transmission is large, and the output voltage of the buck-boost module can be properly increased according to the field test condition so as to compensate transmission attenuation.

Claims

1. A method for adding POE function to equipment comprises electronic equipment with power supply condition and equipment needing POE power supply, and is characterized in that:

(1) transforming electronic equipment with power supply conditions, connecting pins 4 and 5 of a circuit network port of the electronic equipment with the power supply conditions with a positive input electrode of a direct-current power supply, and connecting pins 7 and 8 of the circuit network port of the electronic equipment with the power supply conditions with a negative input electrode of the direct-current power supply;

(2) transforming equipment needing POE power supply, connecting pins 4 and 5 of an equipment circuit network port needing POE power supply with the positive input electrode of a direct current power supply, and connecting pins 7 and 8 of the equipment circuit network port needing POE power supply with the negative input electrode of the direct current power supply;

(3) checking the direct-current power supply parameters of the electronic equipment with the power supply condition and the direct-current power supply parameters of the equipment needing POE power supply, wherein the direct-current power supply parameters of the electronic equipment with the power supply condition comprise direct-current voltage V1 and direct current A1, and the direct-current power supply parameters of the equipment needing POE power supply comprise direct-current voltage V2 and direct current A2;

(4) the electronic equipment with the power supply condition is powered by a power supply with an output direct current voltage of V1 and an output direct current of not less than (A1+ A2V 2/V1);

if V2= V1, the electronic device under the power supply condition and the device requiring POE power supply are directly connected by using the network cable, so as to realize POE power supply;

if V2 is greater than V1, a booster circuit module is used between the two devices, the input voltage is V1, the output voltage is V2, the input end is connected with an electronic device network cable under the power supply condition, and the output end is connected with a device network cable requiring POE power supply, so that POE power supply is realized;

if V2 < V1, use the reduction circuit module between two equipment, input voltage is V1, and output voltage is V2, and the input is connected with the electronic equipment net twine of power supply condition, and the equipment net twine that needs POE power supply is connected to the output, realizes the POE power supply.

2. The method as claimed in claim 1, wherein if the length of the network cable is greater than 50 m, the output voltage of the voltage raising/lowering module is raised.

3. The method of claim 1, wherein the boost circuit module is made of MC34063 chips.

4. The method of claim 1, wherein the voltage-dropping circuit module is made of MC34063 chips.