CN210514707U

CN210514707U - QSFP28 to SFP28 port and downward compatible QSFP + to SFP + port switching device and circuit

Info

Publication number: CN210514707U
Application number: CN201920175358.6U
Authority: CN
Inventors: 关鹤林; 唐凯; 吴天书; 杨现文; 李林科; 张健
Original assignee: Wuhan Linktel Technologies Co Ltd
Current assignee: Wuhan Linktel Technologies Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-05-12
Anticipated expiration: 2029-01-31

Abstract

The utility model relates to a port switching and downward compatible QSFP + to SFP + port switching equipment and circuit for QSFP28 to SFP28, including unlocking means and the casing that comprises drain pan and upper cover, electronic equipment is fixed between drain pan and upper cover, is used for being connected with the SFP28 module electricity that inserts switching equipment cavity intracavity from the tail end, and the joint has the hasp sheet metal component on the afterbody of upper cover; the outer wall of casing is equipped with the spout that is used for holding unlocking device, and unlocking device sliding fit just is spacing in the spout that the casing outer wall was equipped with, and unlocking device's lateral wall is equipped with and is used for making the corresponding QSFP28 cage shell fragment break away from the unblock portion that port switching equipment bounced, installs the spring on the drain pan for provide the power that resets for unlocking device. One path of the port switching equipment is led out from the QSFP28 switch to be communicated with the SFP28 module, and the other three paths of the port switching equipment are used for carrying out signal shielding, so that the purpose of switching between a single-channel signal of the QSFP28 and the SFP28 is achieved, and meanwhile, the conversion from the QSFP28 to the SFP28 and the conversion from the QSFP + to the SFP + which are compatible downwards can be realized.

Description

QSFP28 to SFP28 port and downward compatible QSFP + to SFP + port switching device and circuit

Technical Field

The utility model relates to an optical module field among the optical communication especially relates to a be used for QSFP28 to SFP 28's port and downward compatible QSFP + to SFP + port switching equipment and circuit.

Background

At present, four-way communication is often carried out on high-speed QSFP28 or QSFP + pass, but single-way communication is also carried out, and the split is carried out through an optical splitter or a DEMUX in the past, so that the operation is very complicated and the cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a be used for QSFP28 to SFP 28's port and QSFP + to SFP + port switching equipment and circuit on the switch, can directly realize QSFP28 and SFP28 and change communication one way signal conversion through this port switching equipment on the switch, downward compatible QSFP + carries out communication conversion with SFP +.

The utility model discloses a realize like this: the utility model provides a port switching equipment for QSFP28 to SFP28, including unlocking means and the casing of constituteing by drain pan and upper cover, drain pan and upper cover fixed connection, electronic equipment fixes between drain pan and upper cover for be connected with SFP28 module/SFP + module electricity that inserts switching equipment cavity intracavity from the tail end, the joint has the hasp sheet metal component on the afterbody of upper cover, is used for locking to insert switching equipment's SFP28 module/SFP + module; the outer wall of casing is equipped with the spout that is used for holding unlocking device, unlocking device sliding fit and spacing in the spout that the casing outer wall was equipped with, unlocking device's lateral wall is equipped with and is used for making the corresponding QSFP28/QSFP + cage shell fragment break away from the unblock portion that port switching equipment bounced, install the spring on the drain pan for provide the power that resets for unlocking device. The unlocking device is provided with a bottom shell and an upper cover which are blocked, and the left side and the right side of the unlocking device are respectively provided with a limiting groove on the bottom shell and the upper cover.

The unlocking device comprises a front end part and a rear end part which are connected with each other, the front end part is provided with two parallel side plates and a bottom plate fixed between the two parallel side plates, the left side plate and the right side plate of the front end part of the unlocking device are provided with an upper protrusion extending upwards and a lower protrusion extending downwards, the bottom shell is provided with a limiting groove corresponding to the lower protrusion of the left side plate and the right side plate of the unlocking device, the upper cover is provided with a limiting groove corresponding to the upper protrusion of the left side plate and the right side plate of the unlocking device, the lower protrusions of the left side plate and the right side plate of the unlocking device extend into the limiting groove corresponding to the bottom shell, and the upper protrusion of the left side plate and the right side plate of the front end part of the unlocking device extend into the limiting groove corresponding to the upper cover, so that the unlocking; the ends of the left side plate and the right side plate at the front end part of the unlocking device are provided with outward bent parts to form unlocking parts for separating the corresponding QSFP28 cage elastic sheet from the port switching equipment to bounce; the lower terminal surface of drain pan is equipped with the spring mounting recess, is equipped with the spring in the spring mounting recess, the bottom plate of tip is located spring mounting recess below before the unlocking device, support spring, the bottom plate of tip is equipped with the spring catch that upwards extends before the unlocking device, spring catch on the bottom plate of tip stretches into the spring mounting recess of terminal surface under the drain pan in, contacts with the spring one end in the spring mounting recess, makes the spring provide the power that resets for unlocking device.

The left side plate and the right side plate of the front end part of the unlocking device are respectively in contact with the left outer wall and the right outer wall of the bottom shell correspondingly and are limited in the sliding grooves of the outer walls of the two sides of the shell.

The rear end part of the unlocking device is a U-shaped handle, and the handle is fixedly connected with left and right side plates at the front end part of the unlocking device; two ends of the U-shaped handle are respectively provided with a connecting plate, the end faces of the two connecting plates are provided with slots, and the left side plate and the right side plate of the front end part of the unlocking device are respectively inserted into the slots of the two connecting plates of the two ends of the U-shaped handle to be fixed.

The length of the bottom plate at the front end part of the unlocking device is smaller than that of the side plate. The front ends of two parallel side plates at the front end part of the unlocking device are provided with outward bending parts for unlocking. The front end part of the unlocking device can be made of stainless steel materials, and the rear end part of the unlocking device can be made of nylon materials. The rear end of the unlocking device is formed on the front end of the unlocking device.

The bottom shell and the upper cover can be made of zinc alloy materials. The locking sheet metal part can be made of stainless steel materials.

The transversal U type of personally submitting of hasp sheet metal component, the outer wall is equipped with the joint boss about the upper cover afterbody, the lateral wall is equipped with the bayonet socket about the hasp sheet metal component for with the joint boss joint cooperation that the upper cover afterbody was equipped with.

The bottom shell is clamped with the tail end of the upper cover, and the bottom shell is fixedly connected with the head end of the upper cover through a bolt; the heads of the bottom shell and the upper cover are respectively provided with corresponding bolt mounting holes.

The electronic equipment comprises a PCB and a special mini connector, wherein the PCB comprises a golden finger part, a reporting signal conversion circuit and a communication signal conversion circuit; the mini connector is designed to have a height lower than normal. The PCB and the SFP28 module inserted into the switching equipment are respectively plugged at two ends of the connector to form electric connection.

The utility model discloses use the utility model discloses a QSFP28 switching equipment for conventional SFP28 module can normally carry out the use of single pass switching communication on QSFP28 switch, also can make SFP + module use on QSFP + switch simultaneously.

The utility model provides a be used for QSFP28 to SFP 28's port switching and downward compatible QSFP + to SFP + port switching circuit, including SFP28 interface and four-channel QSFP28 interface, the receiving port Rxp of one of them passageway in the four-channel QSFP28 interface, Rxn is connected with the receiving port RD +, RD-of SFP28 interface, the sending port TD +, TD-of SFP28 interface and the sending port Txp of one of them passageway that corresponds in the four-channel FP28 interface, Txn is connected, make one of them passageway in the four-channel QSFP28 interface carry out signal transmission with SFP28 interface, reach the switching function's of QSFP28 function to SFP28 function switching and downward compatible QSFP + to SFP + switching simultaneously, the receiving port of remaining three passageway in the four-channel QSFP28 interface does not do signal transmission, the sending port of remaining three passageway in the four-channel QSFP28 interface does not do signal transmission.

The utility model discloses a circuit design makes the utility model discloses a port switching equipment for QSFP28 to SFP28 uses on 100G switch, shields wherein three routes in the four ways (the three routes channel of shielding can not carry out signal transmission) for wherein carry out signal transmission with SFP28 module all the way, reach the switching function. Through each PIN PIN of the chip, the switching of the QSFP28 function to the SFP28 function is realized, and the QSFP + to SFP + switching is compatible downwards.

A reporting signal conversion circuit is arranged between the SFP28 interface and the four-channel QSFP28 interface and is used for converting the reporting signals of the related DOM, and the conversion circuit adopts a logic gate chip and an MOS (metal oxide semiconductor) tube with shorter response time, so that the signal conversion is more timely. The Tx _ Fault pin and the Rx _ LOS pin of the SFP28 interface are connected with the INTL pin of the four-channel QSFP28 interface through an OR gate chip, and when any one of a TX _ FAULT signal and an RX _ LOS signal is in a high level, the INTL signal is set high, so that the conversion of interrupt signals is realized; a RESETL pin of the four-channel QSFP28 interface is connected with a TX _ DISABLE pin of the SFP28 interface through a first NOT-gate chip to realize level transition; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS0 pin of the SFP28 interface through a second NOT chip to realize level conversion; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS1 pin of the SFP28 interface through an MOS tube, the grid of the MOS tube is connected with the LPMODE pin of the four-channel QSFP28 interface, the source of the MOS tube is grounded, the drain of the MOS tube is respectively connected with the RS1 pin of the SFP28 interface and one end of a resistor R18, and the other end of the resistor R18 is connected with 3.3V voltage.

A communication signal conversion circuit is arranged between the SFP28 interface and the four-channel QSFP28 interface, the communication signal conversion circuit comprises an I2C module, and an SCL pin and an SDA pin of the four-channel QSFP28 interface, an SCL pin and an SDA pin of the SFP28 interface are respectively connected with pins corresponding to the I2C module, so that the conversion of I2C communication is realized; the ModSelL pin of the four-channel QSFP28 interface is connected with an enable signal terminal of the I2C module, so that the ModSelL signal is used as an enable signal, and when the ModSelL signal is set to be 1, the I2C signal can pass through.

The utility model discloses a conversion equipment can compatible low-rate QSFP + to the port conversion of SFP +. The chips U1 and U2 of the conversion equipment can read the EEPROM information of byte 12 in A0H table defined by SFF-8472 protocol in SFP28/SFP + module from I2C communication to obtain the transmission rate of the module, thereby automatically identifying whether the inserted module model is SFP28 or SFP +, and if the signal is in high-rate mode of 25GB/s, the conversion equipment is in SFP28 mode; if the signal is in a low-rate mode of 10GB/s, the SFP + mode is switched.

Resistors are connected between positive and negative receiving ports of the rest three channels of the four-channel QSFP28 interface, so that the receiving ports of the rest three channels of the four-channel QSFP28 interface do not perform signal transmission, and resistors are connected between positive and negative sending ports of the rest three channels of the four-channel QSFP28 interface, so that the sending ports of the rest three channels of the four-channel QSFP28 interface do not perform signal transmission.

Compared with the prior art, the utility model discloses following beneficial effect has:

by adopting the port switching equipment of the utility model, the port part meets the requirements of QSFP + and QSFP28 protocols and can be connected with a switch; the inside can be connected as the ports of SFP28 and SFP +; the lock catch metal plate part is easy to assemble; in the transfer equipment, when the SFP28/SFP + needs to be unlocked, enough space is reserved at the corresponding SFP28/SFP + pull ring, and the situation that fingers collide with the pull ring 81 of the SFP28/SFP + inserted into the transfer equipment during unlocking is avoided, so that the unlocking device needs to reserve enough space at the unlocking operation position, and fingers have the pressing feeling as less as possible when the SFP28 and the SFP + are unlocked.

The port switching equipment of the utility model can normally switch the SFP28 on the interface of the 100G switch; and meanwhile, the converted module information can be read through I2C, so that the transmission rate is automatically adapted, the optical module can be downwards compatible with the QSFP + to SFP + switching and can be normally used, and the annual cost is saved by 200 million RMB.

Through the circuit design of this patent, make QSFP28 adapter draw forth a way on QSFP28 switch and supply SFP28 module to communicate, three routes carry out signal shielding in addition, thereby reach QSFP28 single-channel signal and SFP28 switching, this design has good compatibility, can realize QSFP28 to the conversion of SFP28 and QSFP + to the conversion of SFP +, make conventional SFP28 module normally carry out the single-channel switching communication use on QSFP28 switch, compatible QSFP + to SFP + switching down simultaneously.

Drawings

Fig. 1 is a schematic external view of a port transition device for QSFP28 to SFP28 according to the present invention;

fig. 2 is a schematic diagram of the internal structure of the port switching device for QSFP28 to SFP28 according to the present invention;

FIG. 3 is a schematic structural diagram of a bottom housing of the port transition device for QSFP28 to SFP28 according to the present invention;

fig. 4 is a schematic structural diagram of an upper cover and a lock sheet metal part of the port switching device for QSFP28 to SFP28 according to the present invention;

fig. 5 is a schematic view of the installation of the upper cover and latch sheet metal parts of the port transition device for QSFP28 to SFP28 according to the present invention;

fig. 6 is a schematic structural diagram of an unlocking device of the port switching apparatus for QSFP28 to SFP28 according to the present invention;

fig. 7 is a schematic structural diagram of an electronic device for a port switching device from QSFP28 to SFP28 according to the present invention;

fig. 8 is a schematic bottom view of the port adapter device of the present invention equipped with SFP28 modules;

fig. 9 is a schematic diagram of the above structure of the port switching device equipped with SFP28 modules according to the present invention;

fig. 10 is a schematic structural diagram of an SFP28 module of the present invention;

FIG. 11 is a schematic backside view of the SFP28 module of FIG. 10;

FIG. 12 is a schematic view of a gold finger portion of a QSFP 28-to-SFP 28 and downward compatible QSFP + to-SFP + transition device;

fig. 13 is a circuit diagram of a reporting signal converting circuit according to the present invention;

fig. 14 is a circuit diagram of a communication signal conversion circuit according to the present invention.

In the attached drawing, 1 is a bottom shell, 1-1 is a spring mounting groove, 2 is an upper cover, 2-1 is a clamping boss, 2-2 is a limiting groove of the upper cover, 3 is a lock catch sheet metal part, 3-1 is a bayonet, 3-2 is a spring plate, 4 is an unlocking device, 4-1 is an upper bulge, 4-2 is a lower bulge, 4-3 is an unlocking part, 4-4 is a spring catch, 4-5 is a U-shaped rod, 5 is a spring, 6 is a PCB (printed Circuit Board), 7 is a connector, 8 is an SFP28 module, and 81 is a pull ring.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 11, the present invention provides a port switching device for QSFP28 to SFP28, including an unlocking device and a housing composed of a bottom shell and an upper cover, where the bottom shell is fixedly connected to the upper cover, so as to form a hollow cavity between the bottom shell and the upper cover for installing an electronic device and an external SFP28 module, the electronic device is fixed between the bottom shell and the upper cover, and is used for being electrically connected to an SFP28/SFP + module inserted into the hollow cavity of the switching device from a tail end, and a locking sheet metal part is fastened to a tail of the upper cover, and is used for locking the SFP28/SFP + module inserted into the switching device; the outer wall of casing is equipped with the spout that is used for holding unlocking device, unlocking device sliding fit and spacing in the spout that the casing outer wall was equipped with, unlocking device's lateral wall is equipped with and is used for making the corresponding QSFP28/QSFP + cage shell fragment break away from the unblock portion that port switching equipment bounced, install the spring on the drain pan for provide the power that resets for unlocking device.

In the transfer equipment, when the SFP28/SFP + needs to be unlocked, enough space is reserved at the corresponding SFP28/SFP + pull ring, and the situation that fingers collide with the pull ring 81 of the SFP28/SFP + inserted into the transfer equipment during unlocking is avoided, so that the unlocking device needs to reserve enough space, namely a U-shaped middle space, at the position of unlocking operation, and fingers have pressing feeling as less as possible when the SFP28 and the SFP + are unlocked.

The transversal U type of personally submitting of hasp sheet metal component, the outer wall is equipped with the joint boss about the upper cover afterbody, the lateral wall is equipped with the bayonet socket about the hasp sheet metal component for with the joint boss joint cooperation that the upper cover afterbody was equipped with. The lock catch sheet metal part is provided with an elastic sheet, and the elastic sheet is provided with a bayonet for being matched with a bulge of an SFP28 module inserted into the switching equipment to lock the SFP28 module inserted into the switching equipment.

The electronic equipment comprises a PCB and a connector, wherein the PCB and an SFP28 module inserted into the switching equipment are respectively plugged at two ends of the connector to form electric connection.

In a specific implementation process, when the port switching device is connected with the external SFP28/SFP + module, after the external SFP28/SFP + module is inserted into the port switching device, the external SFP28/SFP + module is automatically locked by the elastic sheet of the locking sheet metal piece at the tail of the port switching device through the unlocking piece. During the unblock, pulling SFP28/SFP + module pull ring and rotating 90, promote the unblock key (have the spring to withstand), the unblock key has an oblique angle, slowly jacks up the panel beating hasp on the converter, and hasp sheet metal component shell fragment is automatic to be tripped, realizes the unblock function.

When the port switching equipment is connected with an external QSFP28 switch interface, and the port switching equipment is inserted into a switch (a corresponding QSFP28 cage), the cage elastic sheet is buckled into the port switching equipment structure and is clamped and locked. And when unlocking, the unlocking device of the port switching equipment is pulled, so that the cage elastic sheet is separated from the adapter and bounced, and the unlocking function is realized.

The utility model discloses use the utility model discloses a QSFP28 switching equipment for conventional SFP28 module can normally carry out the single pass switching communication on QSFP28 switch and use, downward compatible QSFP + goes to SFP + switching simultaneously.

Referring to fig. 12 to 14, the present invention provides a circuit for a port switching device from QSFP28 to SFP28, which includes an SFP28 interface (SFP28 golden finger) and a four-channel QSFP28 interface (QSFP28 golden finger), where Rx1p and Rx1n of a first channel in the four-channel QSFP28 interface are connected to RD +, RD-of a receiving port of an SFP28 interface, TD +, TD-of a transmitting port of an SFP28 interface are connected to Tx1p and Tx1n of a first channel in the four-channel QSFP28 interface, so that the first channel in the four-channel QSFP28 interface performs signal transmission with the SFP28 interface, thereby implementing interface switching functions from QSFP28 to SFP28, and simultaneously being downward compatible with QSFP + to SFP + switching, where receiving ports of the remaining three channels in the four-channel QSFP28 interface do not perform signal transmission, and the remaining ports of the four channels QSFP28 interface do not perform signal transmission. The utility model discloses QSFP28 golden finger part only chooses for use a passageway, and all the other passageways are connected with 100ohm resistance, do not use in other words. And other control and indication signals are normally connected.

The utility model discloses a connecting resistance between the positive and negative receiving port of the remaining three passageway of four-channel QSFP28 interface namely second passageway, third passageway, fourth passageway makes the receiving port of remaining three passageway do not do signal transmission in the four-channel QSFP28 interface, connecting resistance between the positive and negative transmitting port of the remaining three passageway of four-channel QSFP28 interface namely second passageway, third passageway, fourth passageway makes the transmitting port of remaining three passageway do not do signal transmission in the four-channel QSFP28 interface. The resistance of the present embodiment may be a 100ohm resistance.

Since the high-speed signals satisfy the transmission requirements of the 4 × 25G and 4 × 10G signals at the same time, there is a high requirement for the design. For the two high-speed differential lines TD +/TD-led out from QSFP 28; RD +/RD-, in PCB design, make these two pairs of signal lines keep away from other devices as far as possible, have guaranteed the integrality of the high-speed signal better, its impedance matching's precision is higher. The connector port is plated with gold, so that the electrical performance of the port is more excellent.

The utility model discloses a circuit design utilizes the switch of NMOS pipe and drive circuit's design, makes SFP28 and the DOM of SFP + be relevant to report and can be compatible on same circuit board, when can normally read out information such as LOS, TX _ FUALT of SFP28, also can read information such as LOS, TX _ FUALT of 10G's SFP + module.

The utility model discloses a circuit design makes the utility model discloses a port switching equipment for QSFP2828 to SFP28 uses on 100G switch, shields wherein three routes in the four ways (the three routes channel of shielding can not carry out signal transmission) for wherein carry out signal transmission with SFP28 module all the way, reach the switching function. Through each PIN PIN of the chip, the switching of the QSFP28 function to the SFP28 function is realized, and the QSFP + to SFP + switching is compatible downwards.

And a Tx _ Fault pin and an Rx _ LOS pin of the SFP28 interface are connected with an INTL pin of the four-channel QSFP28 interface through an OR gate chip, and when any one of a TX _ Fault signal and an RX _ LOS signal is in a high level, the INTL signal is set to be high, so that the conversion of an interrupt signal is realized. Or gate chip adopts 7432 chip, when any one of TX _ FAULT and RX _ LOS is in high level, INTL signal is set high, and the conversion of interrupt signal is realized.

A RESETL pin of the four-channel QSFP28 interface is connected with a TX _ DISABLE pin of the SFP28 interface through a first NOT-gate chip to realize level transition; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS0 pin of the SFP28 interface through a second NOT chip to realize level conversion; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS1 pin of the SFP28 interface through an MOS tube, the grid of the MOS tube is connected with the LPMODE pin of the four-channel QSFP28 interface, the source of the MOS tube is grounded, the drain of the MOS tube is respectively connected with the RS1 pin of the SFP28 interface and one end of a resistor R18, and the other end of the resistor R18 is connected with 3.3V voltage. The RESETL signal is converted to a TX _ DISABLE signal through an inverter. The LPMODE signal is converted into an RS0 signal through an NOT gate, and the LPMODE signal is converted into an RS1 signal without level transition, but passes through a MOS tube in order to keep consistent time delay. This completes the conversion of the rate selection signal.

A communication signal conversion circuit is arranged between an SFP28 interface and a four-channel QSFP28 interface in this embodiment, the communication signal conversion circuit includes an I2C module U1 and an I2C module U2, a chip used is ST24C02, an A, B pin of the I2C module U1 is respectively connected with an SCL pin of the four-channel QSFP28 interface and an SCL pin of the SFP28 interface, and a A, B pin of the I2C module U2 is respectively connected with an SDA pin of the four-channel QSFP28 interface and an SDA pin of the SFP28 interface, so as to realize the conversion of I2C communication; the ModSelL pin of the four-channel QSFP28 interface is connected with the enable signal ends of the I2C module U1 and the I2C module U2, the ModSelL signal is used as an enable signal, when the ModSelL signal is set to be 1, the I2C signal can pass through, and the ModSelL signal can not pass through.

Since SFP28 conforms to the same protocol as SFP +, it provides the possibility for the Adapter to implement downward compatible functions. As shown in fig. 14, the chips U1, U2 of the conversion apparatus can read the EEPROM information of byte 12 of the A0H table defined by the SFF-8472 protocol in the SFP28/SFP + module from the I2C communication to obtain the specific value of the transmission rate of the module, thereby automatically identifying whether the inserted module model is SFP28 or SFP +. If the signal is in a high-rate mode of 25GB/s, switching in an SFP28 mode; if the signal is in a low-rate mode of 10GB/s, the SFP + mode is switched.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The device for port switching from QSFP28 to SFP28 and compatible from QSFP + to SFP + is characterized by comprising an unlocking device and a shell consisting of a bottom shell and an upper cover, wherein the bottom shell is fixedly connected with the upper cover, electronic equipment is fixed between the bottom shell and the upper cover and is used for being electrically connected with an SFP28 module/SFP + module inserted into a hollow inner cavity of the switching device from the tail end, and a lock catch sheet metal part is clamped on the tail part of the upper cover and is used for locking the SFP28 module/SFP + module inserted into the switching device; the outer wall of casing is equipped with the spout that is used for holding unlocking device, unlocking device sliding fit and spacing in the spout that the casing outer wall was equipped with, unlocking device's lateral wall is equipped with and is used for making the corresponding QSFP28/QSFP + cage shell fragment break away from the unblock portion that port switching equipment bounced, install the spring on the drain pan for provide the power that resets for unlocking device.

2. The port transition device of claim 1, wherein: the unlocking device comprises a front end part and a rear end part which are connected with each other, the front end part is provided with two parallel side plates and a bottom plate fixed between the two parallel side plates, the left side plate and the right side plate of the front end part of the unlocking device are provided with an upper protrusion extending upwards and a lower protrusion extending downwards, the bottom shell is provided with a limiting groove corresponding to the lower protrusion of the left side plate and the right side plate of the unlocking device, the upper cover is provided with a limiting groove corresponding to the upper protrusion of the left side plate and the right side plate of the unlocking device, the lower protrusions of the left side plate and the right side plate of the unlocking device extend into the limiting groove corresponding to the bottom shell, and the upper protrusion of the left side plate and the right side plate of the front end part of the unlocking device extend into the limiting groove corresponding to the upper cover, so that; the ends of the left side plate and the right side plate at the front end part of the unlocking device are provided with outward bent parts to form unlocking parts for separating the corresponding QSFP28 cage elastic sheet from the port switching equipment to bounce; the lower terminal surface of drain pan is equipped with the spring mounting recess, is equipped with the spring in the spring mounting recess, the bottom plate of tip is located spring mounting recess below before the unlocking device, support spring, the bottom plate of tip is equipped with the spring catch that upwards extends before the unlocking device, spring catch on the bottom plate of tip stretches into the spring mounting recess of terminal surface under the drain pan in, contacts with the spring one end in the spring mounting recess, makes the spring provide the power that resets for unlocking device.

3. The port transition device of claim 2, wherein: the rear end part of the unlocking device is a U-shaped handle, and the handle is fixedly connected with left and right side plates at the front end part of the unlocking device; two ends of the U-shaped handle are respectively provided with a connecting plate, the end faces of the two connecting plates are provided with slots, and the left side plate and the right side plate of the front end part of the unlocking device are respectively inserted into the slots of the two connecting plates of the two ends of the U-shaped handle to be fixed.

4. The port transition device of claim 1, wherein: the transversal U type of personally submitting of hasp sheet metal component, the outer wall is equipped with the joint boss about the upper cover afterbody, the lateral wall is equipped with the bayonet socket about the hasp sheet metal component for with the joint boss joint cooperation that the upper cover afterbody was equipped with.

5. The port transition device of claim 1, wherein: the bottom shell is clamped with the tail end of the upper cover, and the bottom shell is fixedly connected with the head end of the upper cover through a bolt; the heads of the bottom shell and the upper cover are respectively provided with corresponding bolt mounting holes.

6. The port transition device of claim 1, wherein: the electronic equipment comprises a PCB and a connector, wherein the PCB and an SFP28 module inserted into the switching equipment are respectively plugged at two ends of the connector to form electric connection.

7. A circuit for switching a QSFP28 to an SFP28 port and being downward compatible with the QSFP + to SFP + port is characterized by comprising an SFP28 interface and a four-channel QSFP28 interface, wherein a receiving port Rxp and an Rxn of one channel in the four-channel QSFP28 interface are connected with a receiving port RD +, RD-of the SFP28 interface, a sending port TD +, TD-of the SFP28 interface is connected with a sending port Txp and a Txn of a corresponding one channel in the four-channel FP28 interface, so that one channel in the four-channel QSFP28 interface is in signal transmission with an SFP28 interface, the switching function from the QSFP28 function to the SFP28 function is achieved, the QSFP + to the SFP + is downward compatible, the receiving ports of the rest three channels in the four-channel QSFP28 interface are not in signal transmission, and the sending ports of the rest three channels in the four-channel QSFP28 interface are not in signal transmission.

8. The circuit of claim 7, wherein: the Tx _ Fault pin and the Rx _ LOS pin of the SFP28 interface are connected with the INTL pin of the four-channel QSFP28 interface through an OR gate chip, and when any one of a TX _ FAULT signal and an RX _ LOS signal is in a high level, the INTL signal is set high, so that the conversion of interrupt signals is realized; a RESETL pin of the four-channel QSFP28 interface is connected with a TX _ DISABLE pin of the SFP28 interface through a first NOT-gate chip to realize level transition; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS0 pin of the SFP28 interface through a second NOT chip to realize level conversion; the LPMODE pin of the four-channel QSFP28 interface is connected with the RS1 pin of the SFP28 interface through an MOS tube, the grid of the MOS tube is connected with the LPMODE pin of the four-channel QSFP28 interface, the source of the MOS tube is grounded, the drain of the MOS tube is respectively connected with the RS1 pin of the SFP28 interface and one end of a resistor R18, and the other end of the resistor R18 is connected with 3.3V voltage.

9. The circuit of claim 7, wherein: a communication signal conversion circuit is arranged between the SFP28 interface and the four-channel QSFP28 interface; the communication signal conversion circuit comprises an I2C module, wherein an SCL pin and an SDA pin of a four-channel QSFP28 interface and an SCL pin and an SDA pin of an SFP28 interface are respectively connected with corresponding pins of the I2C module, so that the conversion of I2C communication is realized; the ModSelL pin of the four-channel QSFP28 interface is connected with an enable signal end of the I2C module, so that the ModSelL signal is used as an enable signal, and when the ModSelL signal is set to be 1, the I2C signal can pass through; the I2C module is used for reading EEPROM information in the SFP28/SFP + module from I2C communication to obtain the transmission rate of the module, thereby automatically identifying whether the inserted module model is SFP28 or SFP +, and if the signal is in a high-rate mode of 25GB/s, switching to the SFP28 mode; if the signal is in a low-rate mode of 10GB/s, the SFP + mode is switched.

10. The circuit of claim 7, wherein: resistors are connected between positive and negative receiving ports of the rest three channels of the four-channel QSFP28 interface, so that the receiving ports of the rest three channels of the four-channel QSFP28 interface do not perform signal transmission, and resistors are connected between positive and negative sending ports of the rest three channels of the four-channel QSFP28 interface, so that the sending ports of the rest three channels of the four-channel QSFP28 interface do not perform signal transmission.