An optical transmission device based on electrical cross

Abstract

The present invention provides an optical transmission device based on electrical crossover, which adopts multiple SFP interfaces to connect with optical modules, an electrical crossover unit connects multiple SFP interfaces and a control unit, and the control unit is connected to a management port, and generates corresponding control instructions according to different business modes issued by the management port. The optical signal is converted into an electrical signal by the photoelectric conversion of the optical module, and the electrical signal enters the electrical crossover unit. The electrical crossover unit sets the transmission direction of the electrical signal through the corresponding control instruction, and then sends the electrical signal to the designated SFP interface through the electrical crossover unit. The optical module on the designated SFP interface converts the electrical signal into an optical signal output through photoelectric conversion, so that the photoelectric-electrical-optical conversion can be realized, and the conversion between SFP interfaces can be realized. The optical transmission device designed based on the principle of electrical crossover of the present invention has extremely low transmission delay because it only performs photoelectric conversion, and can be applied to a variety of signal transmission scenarios with high transmission delay requirements.

Description

Technical Field

[0001] The present invention relates to the field of optical transmission technology, and in particular to an optical transmission device based on electrical crossover. Background Art

[0002] As the number of Internet users increases, network construction and infrastructure capacity expansion will continue to increase, and optical transmission products will be used more and more.

[0003] Optical Transport Network (OTN) is a transmission network that organizes the network at the optical layer based on wavelength division multiplexing technology. It is the next-generation backbone transmission network. Through a new generation of digital transmission system and optical transmission system specified by a series of ITU-T standards such as G.872, G.709, and G.798, OTN network will solve the problems of traditional WDM network, such as poor wavelength / sub-wavelength service scheduling capability, weak networking capability, and weak protection capability.

[0004] The existing wavelength division multiplexing optical transmission equipment generally uses fixed ports for transmission, which is widely used in low-latency scenarios, but is not conducive to flexible networking applications. Although optical transmission equipment based on OTN network technology can be flexibly networked, there is a process of encapsulation and decapsulation for signal transmission, which increases the transmission delay, and must be used in pairs at the opposite end of signal transmission, which has limitations in application scenarios with high transmission delay requirements. Summary of the invention

[0005] The present invention provides an optical transmission device based on electrical crossover, aiming to solve the problems existing in the prior art.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] The present invention provides an optical transmission device based on electrical crossover, comprising:

[0008] A plurality of SFP interfaces, each of which is connected to an optical module, and the optical module is used to convert an external optical signal into an electrical signal;

[0009] An electrical cross unit, the electrical cross unit connecting the plurality of SFP interfaces and the control unit;

[0010] The control unit is connected to the management port, and the control unit is used to generate corresponding control instructions according to different business modes issued by the management port;

[0011] The electrical cross-connect unit is used to set the transmission direction of the electrical signal according to the control instruction, and send the electrical signal to the specified SFP interface according to the transmission direction;

[0012] The optical module connected to the designated SFP interface is used to convert the electrical signal processed by the electrical cross-connect unit into an optical signal and then output it.

[0013] According to an optical transmission device based on electrical cross-connection provided by the present invention, the service mode includes: at least one of a self-loop mode, an interchange mode, a redundant protection mode and a broadcast mode.

[0014] According to an optical transmission device based on electrical cross-connection provided by the present invention, when the business mode configured to the electrical cross-connection unit is a self-loop mode, for the optical signals of multiple different wavelengths transmitted in one direction, each of the optical signals is input from an optical signal input port of an adapted SFP interface, and the optical signals of each wavelength processed by the electrical cross-connection unit are then sent back to the optical signal output port of the adapted SFP interface for output.

[0015] According to an optical transmission device based on electrical cross-connection provided by the present invention, when the business mode configured to the electrical cross-connection unit is an inter-loop mode, for the optical signals of multiple different wavelengths transmitted in both directions, each of the optical signals in one direction is input from the optical signal input port of the first SFP interface of the adapted SFP interface pair, and the optical signal processed by the electrical cross-connection unit is then sent back to the optical signal output port of the second SFP interface of the SFP interface pair for output, and the optical signal of the same wavelength in the other direction is input from the optical signal input port of the second SFP interface, and the optical signal processed by the electrical cross-connection unit is then sent back to the optical signal output port of the first SFP interface for output.

[0016] According to an optical transmission device based on electrical cross-connection provided by the present invention, when the service mode configured to the electrical cross-connection unit is a redundant mode, an SFP interface group of the optical signal adapted for bidirectional transmission is configured, the third SFP interface in the SFP interface group is set as a customer port, the fourth SFP interface is a main line port, and the fifth SFP interface is a backup line port, the optical signal in any direction is input from the optical signal input port of the third SFP interface, and the optical signal processed by the electrical cross-connection unit is then sent back to the optical signal output ports of the fourth SFP interface and the fifth SFP interface for output;

[0017] Only one signal path is allowed to exist in the signal receiving direction of the main line port and the backup line port. When the signal path in the signal receiving direction of the backup line port is disconnected, the optical signal is input from the optical signal input port of the fourth SFP interface, and the optical signal processed by the electrical cross unit is sent back to the optical signal output port of the third SFP interface for output.

[0018] When the signal path of the signal receiving direction of the main line port is disconnected, the optical signal is input from the optical signal input port of the fifth SFP interface, and the optical signal processed by the electrical cross-connect unit is sent back to the optical signal output port of the third SFP interface for output.

[0019] According to an optical transmission device based on electrical cross-connection provided by the present invention, when the business mode configured to the electrical cross-connection unit is a broadcast mode, an SFP interface group of the optical signal adapted for unidirectional transmission, the optical signal is input from the optical signal input port of any SFP interface of the SFP interface group, and the optical signal processed by the electrical cross-connection unit is sent back to the optical signal output ports of the other SFP interfaces of the SFP interface group for output.

[0020] According to an optical transmission device based on electrical cross-connection provided by the present invention, the management port includes a network port and a serial port;

[0021] The serial port is used to configure the service mode according to the configured communication protocol;

[0022] The network port is used for local or remote connection and receives external input commands to configure the business mode.

[0023] According to an optical transmission device based on electrical cross-connection provided by the present invention, the electrical cross-connection unit is an electrical cross-connection chip, and the control unit is an MCU control unit.

[0024] According to an optical transmission device based on electrical cross-connection provided by the present invention, the MCU control unit responds to the configuration instruction issued by the management port, configures different business modes to the electrical cross-connection chip through the SPI interface of the MCU control unit, and generates corresponding configuration information which is fed back to the host computer connected to the management port via the MCU control unit, and the configuration information is analyzed by the host computer to confirm whether the configuration instruction is effective.

[0025] According to an optical transmission device based on electrical crossover provided by the present invention, the SFP interface can be plugged with an SFP optical module or an SFP+ optical module.

[0026] The present invention provides an optical transmission device based on electrical crossover, which uses multiple SFP interfaces to connect with optical modules, an electrical crossover unit connects multiple SFP interfaces and a control unit, and the control unit is connected to a management port. The control unit generates corresponding control instructions according to different business modes issued by the management port. An optical signal entering from the outside is converted into an electrical signal through the photoelectric conversion of the optical module. The electrical signal enters the electrical crossover unit. The electrical crossover unit sets the transmission direction of the electrical signal through corresponding control instructions, and then sends the electrical signal to the designated SFP interface through other ports of the electrical crossover unit. The optical module on the designated SFP interface converts the electrical signal into an optical signal output through photoelectric conversion, so that photoelectric-electrical-optical conversion can be realized, and conversion between cross-SFP interfaces can be realized. The optical transmission device designed based on the principle of electrical crossover of the present invention can be applied to a variety of signal transmission scenarios with high transmission delay requirements because it only performs photoelectric conversion and has extremely low transmission delay. At the same time, it has the characteristics of flexible networking, which can ensure network quality while accelerating network construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other implementation methods can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a schematic diagram of the structure of an optical transmission device based on electrical cross-connection provided in an embodiment of the present invention;

[0029] Figure 2 It is a control logic diagram of multiple service modes of an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of signal transmission in a self-loop mode of an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of signal transmission in an interchange mode of an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of signal transmission in a redundant mode of an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of signal transmission in broadcast mode of an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows.

[0035] It should be noted that it is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present invention can be combined with other embodiments without conflict. Unless otherwise defined, the technical terms or scientific terms involved in the present invention should be the usual meanings understood by people with ordinary skills in the technical field to which the present invention belongs. The words "one", "a", "a", "the" and the like involved in the present invention do not indicate a quantitative limitation and may represent the singular or plural. The terms "including", "comprising", "having" and any of their variations involved in the present invention are intended to cover non-exclusive inclusions; the terms "first", "second", "third", etc. involved in the present invention are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0036] Reference Figure 1 As shown, an optical transmission device based on electrical cross-connection provided by an embodiment of the present invention includes:

[0037] Multiple SFP interfaces, each SFP interface is connected to an optical module (not shown in the figure), and the optical module is used to convert an external optical signal into an electrical signal;

[0038] An electrical cross unit, the electrical cross unit connects multiple SFP interfaces and a control unit;

[0039] The control unit is connected to the management port, and the control unit is used to generate corresponding control instructions according to different business modes issued by the management port;

[0040] The electrical cross-connect unit is used to set the transmission direction of the electrical signal according to the control instruction, and send the electrical signal to the specified SFP interface according to the transmission direction;

[0041] The optical module connected to the specified SFP interface is used to convert the electrical signal processed by the electrical cross-connect unit into an optical signal for output.

[0042] As an example, the electrical cross-connect unit is an electrical cross-connect chip, and the control unit is an MCU control unit.

[0043] As an example, the SFP interface can be plugged with an SFP optical module or an SFP+ optical module.

[0044] In this embodiment, the management port is connected to a host computer (not shown in the figure), and the service mode sent by the host computer through the management port includes: at least one of self-loop mode, interchange mode, redundant protection mode and broadcast mode.

[0045] In this embodiment, the management port includes a network port and a serial port. The serial port is used to configure the business mode according to the configured communication protocol, and the network port is used for local or remote connection to receive external input commands to configure the business mode.

[0046] Specifically, the MCU control unit responds to the configuration instructions issued by the management port, configures different business modes to the electrical cross-connect chip through the SPI interface of the MCU control unit, and generates corresponding configuration information, which is fed back to the host computer connected to the management port through the MCU control unit. The host computer analyzes the configuration information to confirm whether the configuration instructions are effective. Remote configuration management is supported through the management port to realize the transmission function of the optical transmission equipment.

[0047] It should be noted that in actual application, one or more business modes can be configured according to the scenario requirements, such as Figure 2 As shown in the figure, the business mode configured at ① is the self-loop mode, the business mode configured at ② is the mutual loop mode, the business mode configured at ③ is the redundant mode, and the business mode configured at ④ is the broadcast mode. The optical transmission device supports the coexistence of multiple business modes to realize the application of multiple signal transmission scenarios corresponding to multiple business modes on a single optical transmission device.

[0048] In this embodiment, when the business mode configured to the electrical cross-connect unit is the self-loop mode, for multiple optical signals of different wavelengths transmitted in one direction, each optical signal is input from the optical signal input port of an adapted SFP interface, and the optical signals of each wavelength processed by the electrical cross-connect unit are then sent back to the optical signal output port of the adapted SFP interface for output.

[0049] Specifically, refer to Figure 3 As shown, the self-loop mode is applied to the unidirectional transmission scenario. One end of the unidirectional transmission line is connected to the optical module, and the input optical signal is a plurality of optical signals of different wavelengths (λ1~λn), and enters the optical signal input port Rx of the adapted SFP interface 1~SFP interface n respectively. For example, the optical signal with wavelength λ1 enters SFP interface 1, the optical signal with wavelength λ2 enters SFP interface 2... The optical signal with wavelength λn enters SFP interface n. The optical signals of multiple wavelengths are combined into one port through the combiner. When the optical signal reaches the other end of the unidirectional transmission line, the combined optical signal is decomposed into a plurality of optical signals of different wavelengths (λ1~λn) by the demultiplexer of the optical transmission equipment, and then sent to the SFP interface of the corresponding channel through the electrical cross chip processing, that is, the optical signal output port Tx of SFP interface 1~SFP interface n.

[0050] Taking SFP interface 1 as an example, the optical signal with wavelength λ1 is input from the optical signal input port R1 of SFP interface 1, processed by the electrical cross-connect chip, and then sent back to the optical signal output port T1 of SFP interface 1 for output. Similarly, the optical signals with wavelengths λ2 to λn corresponding to the optical signal input ports T2 to Tn of SFP interface 2 to SFP interface n are processed by the electrical cross-connect chip and then sent back to the optical signal output ports R2 to Rn of SFP interface 2 to SFP interface n. The signal transmission scenario in the self-loop mode can be applied to security projects. Data is only transmitted in one direction, ensuring that the receiving device only passively receives signals and does not return signals.

[0051] In this embodiment, when the service mode configured to the electrical cross unit is the inter-loop mode, for multiple optical signals of different wavelengths transmitted in both directions, each optical signal in one direction is input from the optical signal input port of the first SFP interface of the adapted SFP interface pair, and the optical signal processed by the electrical cross unit is then sent back to the optical signal output port of the second SFP interface of the SFP interface pair for output, and the optical signal of the same wavelength in the other direction is input from the optical signal input port of the second SFP interface, and the optical signal processed by the electrical cross unit is then sent back to the optical signal output port of the first SFP interface for output.

[0052] Specifically, refer to Figure 4 As shown, the inter-loop mode is applied to the bidirectional transmission scenario. One end of the bidirectional transmission line is connected to the optical module, and its input optical signal is an optical signal of multiple different wavelengths (λ1~λn), and enters the optical signal input port of the adapted SFP interface pair respectively. For example, the optical signal with a wavelength of λ1 enters the optical signal input port (R1, R2) of the SFP interface pair composed of SFP interface 1 and SFP interface 2, the optical signal with a wavelength of λ2 enters the optical signal input port (R3, R4) of the SFP interface pair composed of SFP interface 3 and SFP interface 4, and the optical signal with a wavelength of λn enters the optical signal input port (Rn, Rn+1) of the SFP interface pair composed of SFP interface n and SFP interface n+1.

[0053] For one of the transmission lines of the bidirectional transmission line, optical signals of multiple wavelengths are combined into one port through a combiner, and the optical signal reaches the other end of the transmission line. The combined optical signal is decomposed into multiple optical signals of different wavelengths (λ1 to λn) by a demultiplexer of the optical transmission equipment, and then processed by an electrical cross chip and sent back to the corresponding SFP interface pair. For example, after being processed by the electrical cross chip, the optical signal with a wavelength of λ1 is sent back to the optical signal output ports (T1, T2) of SFP interface 1 and SFP interface 2, the optical signal with a wavelength of λ2 is sent back to the optical signal input ports (T3, T4) of SFP interface 3 and SFP interface 4, and the optical signal with a wavelength of λn is sent back to the optical signal input ports (Tn, Tn+1) of SFP interface n and SFP interface n+1.

[0054] Taking the SFP interface pair composed of SFP interface 1 and SFP interface 2 as an example, the optical signal with a wavelength of λ1 in one direction of the bidirectional transmission line is input from the optical signal input port R1 of SFP interface 1, processed by the electrical cross chip, and then sent back to the optical signal output port T2 of SFP interface 2 for output. The optical signal with a wavelength of λ1 in the other direction is input from the optical signal input port R2 of SFP interface 2, processed by the electrical cross chip, and then sent back to the optical signal output port T1 of SFP interface 1 for output. The bidirectional transmission line performs bidirectional transmission of optical signals through dual fibers.

[0055] In this embodiment, when the service mode configured to the electrical cross unit is a redundant mode, the SFP interface group adapted for bidirectionally transmitted optical signals, the third SFP interface in the SFP interface group is set as a customer port, the fourth SFP interface is a main line port, and the fifth SFP interface is a backup line port. An optical signal in any direction is input from the optical signal input port of the third SFP interface, and the optical signal processed by the electrical cross unit is sent back to the optical signal output ports of the fourth SFP interface and the fifth SFP interface for output;

[0056] Only one signal path is allowed to exist in the signal receiving direction of the main line port and the backup line port. When the signal path in the signal receiving direction of the backup line port is disconnected, the optical signal is input from the optical signal input port of the fourth SFP interface, and the optical signal processed by the electrical cross-connect unit is sent back to the optical signal output port of the third SFP interface for output.

[0057] When the signal path of the signal receiving direction of the main line port is disconnected, the optical signal is input from the optical signal input port of the fifth SFP interface, and the optical signal processed by the electrical cross-connect unit is sent back to the optical signal output port of the third SFP interface for output.

[0058] Specifically, refer to Figure 5 As shown, SFP interfaces 4, 5, and 6 are used as an SFP interface group adapted for bidirectional transmission of optical signals, and the third SFP interface (SFP interface 6) in the SFP interface group is set as a customer port, the fourth SFP interface (SFP interface 4) is a main line port, and the fifth SFP interface (SFP interface 5) is a standby line port. The optical signal is input from the optical signal input port R6 of the SFP interface 6, and after being processed by the electrical cross chip, the optical signal is sent back to the optical signal output port T4 of the SFP interface 4 and the optical signal output port T5 of the SFP interface 5 for output.

[0059] Only one signal path is allowed to exist in the signal receiving direction of the main line port and the backup line port. When the signal path in the signal receiving direction of the backup line port is disconnected, that is, there is no optical signal in the backup line, the optical signal is input from the optical signal input port R4 of the SFP interface 4, and after being processed by the electrical cross chip, the optical signal is sent back to the optical signal output port T6 of the SFP interface 6 for output; when the signal path in the signal receiving direction of the main line port is disconnected, that is, there is no optical signal in the main line, the optical signal is input from the optical signal input port R5 of the SFP interface 5, and after being processed by the electrical cross chip, the optical signal is sent back to the optical signal output port T6 of the SFP interface 6 for output. Therefore, when a transmission line of the main line and the backup line is interrupted, the MCU control unit detects that the optical signal of the transmission line is lost, and then switches the line by configuring the electrical cross chip to realize the redundant protection function.

[0060] In this embodiment, when the business mode configured to the electrical cross-connect unit is the broadcast mode, the SFP interface group adapted for unidirectionally transmitted optical signals, the optical signal is input from the optical signal input port of any SFP interface of the SFP interface group, and the optical signal processed by the electrical cross-connect unit is sent back to the optical signal output ports of the other SFP interfaces of the SFP interface group for output.

[0061] Specifically, refer to Figure 6 As shown, SFP interface 7 is used as the signal source input interface, and SFP interfaces 8 to 10 are used as signal output interfaces. The optical signal is input from the optical signal input port R7 of SFP interface 7, and the signal is sent back to the optical signal input ports T8 to T10 of the SFP interface for output through the electrical cross chip. The signal source input interface and the signal output interface can be configured arbitrarily. The signal transmission scenario applicable to the broadcast mode can not only perform unidirectional data transmission, but also perform point-to-multipoint data transmission, and can transmit the same data to multiple nodes to achieve broadcast transmission effect.

[0062] As described above, the present embodiment provides an optical transmission device based on electrical crossover, which uses multiple SFP interfaces to connect with optical modules, the electrical crossover unit connects multiple SFP interfaces and the control unit, the control unit is connected to the management port, and the control unit generates corresponding control instructions according to different business modes issued by the management port. The optical signal entering from the outside is converted into an electrical signal through the photoelectric conversion of the optical module, and the electrical signal enters the electrical crossover unit. The electrical crossover unit sets the transmission direction of the electrical signal through the corresponding control instruction, and then sends the electrical signal to the designated SFP interface through other ports of the electrical crossover unit. The optical module on the designated SFP interface converts the electrical signal into an optical signal output through photoelectric conversion, so that the photoelectric-electrical-optical conversion can be realized, and the conversion between SFP interfaces can be realized. The optical transmission equipment designed based on the principle of electrical crossover of the present invention can be applied to a variety of transmission scenarios with high transmission delay requirements because it only performs photoelectric conversion and has extremely low transmission delay. At the same time, it has the characteristics of flexible networking, which can ensure network quality while accelerating network construction.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An optical transmission device based on electrical crossover, characterized in that: include: A plurality of SFP interfaces, each of which is connected to an optical module, and the optical module is used to convert an external optical signal into an electrical signal; An electrical cross unit, the electrical cross unit connecting the plurality of SFP interfaces and the control unit; The control unit is connected to the management port, and the control unit is used to generate corresponding control instructions according to different business modes issued by the management port, and the business mode includes: at least one of self-loop mode, interchange mode, redundant protection mode and broadcast mode; The control unit responds to the configuration instruction issued by the management port, and the control unit configures different service modes to the electrical cross-connect unit through the SPI interface, so as to support the coexistence of multiple service modes on the optical transmission device; The electrical cross-connect unit is used to set the transmission direction of the electrical signal according to the control instruction, and send the electrical signal to the specified SFP interface according to the transmission direction; The optical module connected to the designated SFP interface is used to convert the electrical signal processed by the electrical cross-connect unit into an optical signal and then output it.

2. The optical transmission device based on electrical crossover according to claim 1, characterized in that: When the business mode configured to the electrical cross-connect unit is the self-loop mode, for the optical signals of multiple different wavelengths transmitted in one direction, each optical signal is input from the optical signal input port of an adapted SFP interface, and the optical signals of each wavelength processed by the electrical cross-connect unit are then sent back to the optical signal output port of the adapted SFP interface for output.

3. The optical transmission device based on electrical crossover according to claim 1, characterized in that: When the business mode configured to the electrical cross-connect unit is the inter-loop mode, for the optical signals of multiple different wavelengths transmitted in both directions, each of the optical signals in one direction is input from the optical signal input port of the first SFP interface of the adapted SFP interface pair, and the optical signal processed by the electrical cross-connect unit is then sent back to the optical signal output port of the second SFP interface of the SFP interface pair for output, and the optical signal of the same wavelength in the other direction is input from the optical signal input port of the second SFP interface, and the optical signal processed by the electrical cross-connect unit is then sent back to the optical signal output port of the first SFP interface for output.

4. The optical transmission device based on electrical crossover according to claim 1, characterized in that: When the service mode configured to the electrical cross unit is a redundant mode, the SFP interface group of the optical signal adapted for bidirectional transmission, the third SFP interface in the SFP interface group is set as a customer port, the fourth SFP interface is set as a main line port, and the fifth SFP interface is set as a backup line port, the optical signal in any direction is input from the optical signal input port of the third SFP interface, and the optical signal processed by the electrical cross unit is sent back to the optical signal output ports of the fourth SFP interface and the fifth SFP interface for output; Only one signal path is allowed to exist in the signal receiving direction of the main line port and the backup line port. When the signal path in the signal receiving direction of the backup line port is disconnected, the optical signal is input from the optical signal input port of the fourth SFP interface, and the optical signal processed by the electrical cross unit is sent back to the optical signal output port of the third SFP interface for output. When the signal path of the signal receiving direction of the main line port is disconnected, the optical signal is input from the optical signal input port of the fifth SFP interface, and the optical signal processed by the electrical cross-connect unit is sent back to the optical signal output port of the third SFP interface for output.

5. The optical transmission device based on electrical crossover according to claim 1, characterized in that: When the business mode configured to the electrical cross unit is the broadcast mode, the SFP interface group adapted for the unidirectionally transmitted optical signal, the optical signal is input from the optical signal input port of any SFP interface of the SFP interface group, and the optical signal processed by the electrical cross unit is sent back to the optical signal output ports of the other SFP interfaces of the SFP interface group for output.

6. The optical transmission device based on electrical crossover according to claim 1, characterized in that: The management port includes a network port and a serial port; The serial port is used to configure the service mode according to the configured communication protocol; The network port is used for local or remote connection and receives external input commands to configure the business mode.

7. The optical transmission device based on electrical crossover according to claim 6, characterized in that: The electrical cross unit is an electrical cross chip, and the control unit is an MCU control unit.

8. The optical transmission device based on electrical crossover according to claim 7, characterized in that: The MCU control unit responds to the configuration instructions issued by the management port, configures different business modes to the electrical cross-connect chip through the SPI interface of the MCU control unit, and generates corresponding configuration information which is fed back to the host computer connected to the management port via the MCU control unit. The host computer analyzes the configuration information to confirm whether the configuration instructions are effective.

9. The optical transmission device based on electrical crossover according to claim 1, characterized in that: The SFP interface can be plugged with an SFP optical module or an SFP+ optical module.

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