CN117155471A - Optical transceiver unit and ONU equipment - Google Patents

Abstract

The application relates to an optical transceiver unit and ONU equipment, belonging to the field of optical network communication. Wherein, this light receiving and transmitting unit includes: the system comprises a control module, a selection module and an optical module interface which are sequentially connected in a communication way: the optical module interface comprises a first interface and a second interface; the matching module comprises a first link and a second link, wherein the first link is used for connecting the first interface and the control module in a signal manner, the second link is used for connecting the second interface and the control module in a signal manner, and the first link or the second link is in a communication state; the control module is used for configuring a communication mode which is matched with one of the first link and the second link in a communication state according to the preset optical network unit type.

Description

Optical transceiver unit and ONU equipment

Technical Field

The present application relates to the field of optical fiber network communications, and in particular, to an optical transceiver unit and an ONU device.

Background

The optical network unit (Optical Network Unit, ONU) is an access network terminal device. It is at the end of the optical fiber managed by the cable termination equipment (Optical Line Terminal, OLT), provides fiber-to-user home conversion, and interfaces with the equipment that the user is ultimately using. Depending on the application scenario, the optical network unit types may be classified into EPON, GPON, 10G-EPON, XG-PON, XGSPON, etc., and different types of ONUs require different optical transmit receive assemblies (BOSA).

At present, one type of optical network unit corresponds to one BOSA interface, so different circuit boards are required to be respectively designed corresponding to different types of optical network units.

The existing ONU has a plurality of types, and the SFP optical module can be flexibly switched according to the application type, but has higher cost and is not suitable for large-scale use of cost-sensitive application scenes; BOSA On Board (BOB) cannot change every type according to application scenarios. In the prior art, corresponding circuit boards are required to be designed according to the types of the optical network units, and the corresponding types of circuit boards can only be applied to fixed scenes, so that the cost is high.

Disclosure of Invention

The embodiment of the application provides an optical transceiver unit and ONU equipment, which at least solve the problem of excessive cost caused by the fact that corresponding circuit boards are respectively designed according to the type of an optical network unit in the related technology.

In a first aspect, an embodiment of the present application provides an optical transceiver unit, including a control module, an optional module, and an optical module interface that are sequentially connected in a communication manner:

the optical module interface comprises a first interface and a second interface;

the matching module comprises a first link and a second link, wherein the first link is used for connecting the first interface and the control module in a signal manner, the second link is used for connecting the second interface and the control module in a signal manner, and the first link or the second link is in a communication state;

the control module is used for configuring a communication mode which is matched with one of the first link and the second link in a communication state according to the preset optical network unit attribute.

In one embodiment, the first link includes:

the first optional network unit is used for being electrically connected with the control module;

the second optional network unit is electrically connected with the first optional network unit and is also electrically connected with the first interface.

In one embodiment, the second link includes a first sub-link including:

the first optional network unit is used for being electrically connected with the control module;

the first functional module is electrically connected with the first optional network unit and is also electrically connected with the second interface.

In one embodiment, the second link includes a second sub-link including:

the first optional network unit is used for being electrically connected with the control module;

the second optional network unit is electrically connected with the first optional network unit and the second functional module;

the second functional module is electrically connected with the second optional network unit and is also electrically connected with the second interface.

In one embodiment, the first and/or second optional network elements comprise: a signal branching circuit; the signal branching circuit includes:

the public end is used for connecting the control module;

the first branch end is electrically connected with the public end through a first resistor and is used for communicating the first link;

and the second branch end is electrically connected with the public end through a second resistor and is used for communicating the second link.

In one embodiment, the signal branch circuit includes a single ended signal branch circuit and a differential signal branch circuit.

In one embodiment, the first functional module includes a drive unit, an optional network subunit, a symmetric unit, and an asymmetric unit:

the driving unit is electrically connected with the selected network subunit;

the selected network sub-unit is electrically connected with the symmetrical unit and is used for configuring the second interface to support the first optical network unit type;

the optional network sub-unit is electrically connected to the asymmetric unit and is configured to support a second optical network unit type by the second interface.

In one embodiment, the second functional module includes a driving unit and a functional unit:

the driving unit is electrically connected with the functional unit and is used for configuring the second interface to support a third optical network unit type.

In a second aspect, an embodiment of the present application provides an ONU device, including an optical transceiver unit according to any one of the first aspects.

The optical transceiver unit and the ONU equipment provided by the embodiment of the application have at least the following technical effects.

The application designs a plurality of different communication links through the control module, the matching module and the optical module interface, and determines the corresponding communication links and the communication mode matched with the preset optical network unit type according to the preset optical network unit type. The optical transceiver unit provided by the application solves the problems that the corresponding circuit board is required to be designed according to each type of optical network unit in the prior art, and the cost is high because each circuit board can only be applied to a fixed scene. The interface corresponding to different optical network unit types is integrated on a single optical network unit circuit board, so that the time for hardware design, development and debugging is saved, and the production cost is reduced.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the application.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a block diagram of an optical transceiver unit according to an exemplary embodiment;

FIG. 2 is an illustration of an optional module link diagram in accordance with an exemplary embodiment;

FIG. 3 is a signal branch circuit diagram shown according to an exemplary embodiment;

FIG. 4 is an illustration of an optional network subunit link diagram, according to an example embodiment;

fig. 5 is a schematic structural diagram of an ONU device according to an embodiment of the present application.

Detailed Description

The present application will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present application without making any inventive effort, are intended to fall within the scope of the present application.

It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the application can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "a," "an," "the," and similar referents in the context of the application are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

In a first aspect, an embodiment of the present application provides an optical transceiver unit, where the optical transceiver unit is configured to be disposed on an ONU single board. Fig. 1 is a block diagram of an optical transceiver unit according to an exemplary embodiment, and as shown in fig. 1, the optical transceiver unit includes a control module 100, an option module 200, and an optical module interface 300 that are sequentially communicatively connected.

The optical module interface 300 includes a first interface 310 and a second interface 320, wherein the first interface 310 and the second interface 320 are of different types.

Optionally, the first interface 310 is an SFP optical module interface, configured to plug in an SFP optical module; the second interface 320 is a BOB interface, and is used for implementing data docking by using an optical fiber interface on the BOB module. In this way, the SFP optical module interface and the BOB interfaces of various types are integrated on the same ONU single board through the optical module interface, which is beneficial to realizing flexible application of the optical network unit type configuration subsequently, saves the time of hardware development and reduces the production cost.

Fig. 2 is an illustration of an optional module link diagram, as shown in fig. 2, in accordance with an exemplary embodiment.

The matching module 200 includes a first link and a second link, the first link is used for signal connection between the first interface 310 and the control module 100, the second link is used for signal connection between the second interface 320 and the control module 100, and the first link or the second link is in a connected state.

The optical network unit types comprise EPON, GPON, 10G-EPON, XG-PON, XGSPON and the like. The control module 100 adapts the first link or the second link according to a preset optical network unit type, so as to realize flexible application of the optical network unit type for configuration. The specific preset optical network unit type generally depends on the actual application scenario. Conventionally, when the network transmission rate is below 2.5G, an EPON or GPON type interface is generally adopted; when the network transmission rate is above 2.5G, 10G-EPON, XG-PON or XGSPON type interfaces are generally used.

In one example, as shown in fig. 2, the first link includes a first optional network element 210 and a second optional network element 220. The first optional network unit 210 is electrically connected to the control module 100. The second optional network unit 220 is electrically connected to the first optional network unit 210, and is further electrically connected to the first interface 310.

Optionally, the first election network unit 210 is a 10GE election network, the second election network unit 220 is a GE election network, and the first interface 310 is an SFF interface. The first link signal conforms to a standard SFF interface signal line definition, including an optical module control signal line definition and a communication signal line definition. The first link is mainly used for realizing the flexible application type configuration by switching the corresponding communication mode through the control module according to the type of the inserted SFP optical module.

The complete first link includes the control module 100, the first election network 210, the second election network 220, and the first interface 310 connected in sequence.

In this example, the SFP optical module type is implemented on the ONU single board by configuring the first link, and the flexible application type configuration is implemented by the control module switching the corresponding communication mode according to the inserted SFP optical module type.

In one example, as shown in fig. 2, the second link includes a first sub-link including: a first optional network element 210 and a first functional module 230. The first optional network unit 210 is electrically connected to the control module 100. The first functional module 230 is electrically connected to the first optional network unit 210 and is further electrically connected to the second interface 320.

Optionally, the first optional network unit 210 is a 10GE optional network, the first functional module 230 is a 10GE-BOB module, and the second interface 320 is a BOB interface. The first sub-link symbol standard SFF interface signal line definition includes an optical module control signal line and a high-speed differential communication signal line. The first sub-link is mainly used for realizing an optical network unit of the XGPON, XGSPON or 10G-EPON type.

The complete first sub-link includes the control module 100, the first option network 210, the first functional module 230, and the second interface 320 connected in sequence.

In this example, the BOB interface and the SFP optical module interface are integrated onto the same ONU single board. By selectively configuring the first optional network unit 210 and the first functional module 230, the first sub-circuit is connected, and a BOB interface of XGPON, XGSPON or 10G-EPON type is implemented. In this way, in terms of production, the hardware design, development and debugging time of the ONU single board is saved, the production cost is reduced, and the application scene of the ONU single board is more flexible.

In one example, the second link includes a second sub-link including: a first optional network element 210, a second optional network element 220, and a second functional module 240. The first optional network unit 210 is electrically connected to the control module 100. The second optional network unit 220 is electrically connected to the first optional network unit 210 and the second functional module 240. The second functional module 240 is electrically connected to the second optional network unit 220, and is further electrically connected to the second interface 320.

Optionally, the first election network unit 210 is a 10GE election network; the second election network unit 220 is a GE election network; the second functional module 240 is a GE-BOB module; the second interface 320 is a BOB interface. The second sub-link symbol standard SFF interface signal line definition includes an optical module control signal line and a high-speed differential communication signal line. The second sub-link is mainly used for implementing an optical network unit of the GPON or EPON type.

The complete second sub-link includes the control module 100, the first election network 210, the second election network 220, the second functional module 240, and the second interface 320 connected in sequence.

In this example, the BOB interface and the SFP optical module interface are integrated onto the same ONU single board. The BOB interface of the GPON or EPON type is implemented by selectively configuring the first optional network unit 210, the second optional network unit 220, and the second functional module 240 to communicate with the second sub-link. In this way, in terms of production, the hardware design, development and debugging time of the ONU single board is saved, the production cost is reduced, and the application scene of the ONU single board is more flexible.

Referring to fig. 2, in order to implement the matching functions of the first matching network unit 210 and the second matching network unit 220, a signal branching circuit is employed.

In one example, the first and second optional network elements include signal branching circuitry. Fig. 3 is a signal branch circuit diagram shown in accordance with an exemplary embodiment. As shown in fig. 3, the signal branching circuit includes: a common terminal 1, a first branch terminal 3 and a second branch terminal 2.

The common terminal 1 is used for connecting with the control module 100. The first branch end 3 is electrically connected with the common end through a first resistor and is used for communicating with the first sub-link. The second branch end 2 is electrically connected with the common end through a second resistor and is used for communicating with a second sub-link.

Wherein the signal branch circuit includes a single-ended signal branch circuit and a differential signal branch circuit. The single ended signal branch circuit uses two package resistances (a first resistance R1 and a second resistance R2), optionally including 0402 package mount resistances. One end of the first resistor R1 and one end of the second resistor R2 are connected to form a common end 1, the other end of the first resistor R1 forms a first branch end 3, and the other end of the second resistor R2 forms a second branch end 2. The resistor pads of the common terminal 1 are stacked on the circuit board in a layout manner that the first resistor R1 is perpendicular to the second resistor R2. One end bonding pad on the single-ended signal branch resistance circuit board is overlapped, impedance mutation caused by branching is reduced, and high-speed signal transmission quality is optimized.

Referring to fig. 3, the differential signal branch circuit uses 4 package mounting resistors, optionally including 0201 package mounting resistors. The four resistors are respectively a first resistor comprising a first sub resistor R3 and a second sub resistor R5, and a second resistor comprising a third sub resistor R4 and a fourth sub resistor R6. One end of the first sub resistor R3 is connected with one end of the third sub resistor R4, one end of the second sub resistor R5 is connected with one end of the fourth sub resistor R6, the differential common terminal 1 is formed together, the other end of the first sub resistor R3 and the other end of the second sub resistor R5 form a differential first branch terminal 3, and the other end of the third sub resistor R4 and the other end of the fourth sub resistor R6 form a differential second branch terminal 2. The first branch end comprises two branches with opposite directions. The first sub resistor R3 is perpendicular to the third sub resistor R4, the second sub resistor R5 is perpendicular to the fourth sub resistor R6, and the first sub resistor R3 and the second sub resistor R5 are symmetrically arranged up and down on the circuit board. One end bonding pad on the differential signal branch resistance circuit board is overlapped, impedance mutation caused by branching is reduced, and high-speed signal transmission quality is optimized.

The single first and second optional network elements include a plurality of single-ended signal branch circuits and differential signal branch circuits.

In this example, the first branch end 3 and the second branch end 2 are connected through the common end 1, so that the selection and welding of the communication link are realized. And according to a link corresponding to the preset optical network unit type, connecting the link on the ONU circuit board through welding the selected branch end resistor. In this way, the corresponding links are selected according to the type of the optical network unit, and the links are communicated through the selected welding branch resistor. The optical transceiver unit is arranged on the ONU single board, so that the plurality of types of BOB interfaces are arranged on the same ONU single board, the hardware design, development and debugging time of the ONU single board is saved, the production cost is reduced, and the application scene of the ONU single board is more flexible. In addition, one end bonding pad on the branch resistor is overlapped and placed, impedance mutation caused by branching is reduced, and high-speed signal transmission quality is optimized.

With continued reference to fig. 2, regarding the structure of the first functional module 230, in one example, the first functional module 230 includes a driving unit 231, an optional network subunit 232, a symmetric unit 233, and an asymmetric unit 234. Fig. 4 is an illustration of an optional network subunit link diagram, according to an example embodiment.

As shown in fig. 4, the driving unit 231 is electrically connected to the optional network subunit 232. The optional network sub-unit 232 is electrically connected to the symmetric unit 233, and is configured to configure the first optical network unit type supported by the second interface. The optional network subunit 232 is electrically connected to the asymmetric unit 234, and is configured to configure a second optical network unit type supported by the second interface.

In this example, different processing chips are assembled by the driving unit 231 in the first functional module 230, and different processing units are selected by the optional network subunit 232, so as to implement multiple types of BOB interfaces on the ONU single board. In this way, the ONU circuit board does not need to be redesigned, the hardware design, development and debugging time is saved, the production cost is reduced, and the application scene of the ONU single board is more flexible. Meanwhile, the symmetrical units and the asymmetrical units are selected according to specific application scenes, different packaging modes are adopted for the symmetrical units and the asymmetrical units, the production cost is reduced, and the flexibility of product application is improved.

Alternatively, the drive unit 231 is a 10GE-BOSA drive. The model of the 10GE-BOSA driver chip comprises GN28L97 and GN28L98, the two chips are packaged in a QFN32 mode, and the definition of pin signals is the same. GN28L97 supports 10GE asymmetric rate BOSA and GN28L98 supports 10GE symmetric rate BOSA. Optionally, the optional network subunit 232 is a 10GE-BOSA optional network; symmetry unit 233 is a 10GE symmetric rate BOSA; asymmetric unit 234 is a 10GE asymmetric rate BOSA. The first optical network unit type includes XGSPON and symmetric rate 10G-EPON; the second optical network unit type includes XGPON and asymmetric rate 10G-EPON.

Selection of a scenario with respect to a particular application of the optional network sub-unit, for example:

when the preset optical network unit type is XGSPON or symmetric rate 10G-EPON, the 10GE-BOSA driver assembles driver chip GN28L98 to support symmetric rate BOSA. The 10GE-BOSA driver is connected with a 10GE-BOSA selection network, the 10GE-BOSA selection network is connected with a symmetrical 10GE-BOSA, and the symmetrical rate 10GE-BOSA is assembled into a general symmetrical rate 10G BOSA device.

When the preset optical network unit type is XGPON or asymmetric rate 10G-EPON, the 10GE-BOSA driver is provided with a driver chip GN28L97 to support asymmetric rate BOSA. The 10GE-BOSA driver is connected with a 10GE-BOSA selection network, the 10GE-BOSA selection network is connected with an asymmetric rate 10GE-BOSA, and the asymmetric rate 10GE-BOSA is assembled into a general asymmetric rate 10G BOSA device.

The 10GE asymmetric-rate BOSA and the 10GE symmetric-rate BOSA respectively adopt general packaging BOSA devices, are influenced by data transmission rate factors, and have different packaging forms.

In one example, the second functional module 240 includes a driving unit 241 and a functional unit 242. The driving unit 241 is electrically connected to the functional unit 242, and is configured to support a third optical network unit type by the second interface.

Optionally, the driving unit is a GE-BOSA driver; the functional unit is GE-BOSA; the third optical network unit type includes EPON and GPON types.

Regarding the specific application selection scenario of the optional network sub-unit, for example, when the preset optical network unit type is EPON or GPON, the main chip assembled by the GE-BOSA driving circuit is GN25L95. The GE-BOSA adopts a general packaging BOSA device, and can select a plurality of manufacturer compatible models.

In this example, multiple types of BOB interfaces are implemented on the ONU single board by electrically connecting the driving unit 241 to the functional unit 242 in the second functional module 240. In this way, the ONU circuit board does not need to be redesigned, the hardware design, development and debugging time is saved, the production cost is reduced, and the application scene of the ONU single board is more flexible.

In addition, with continued reference to fig. 1, the control module 100 is configured to configure a communication mode adapted to one of the first link and the second link in a connected state according to a preset optical network unit type.

The control module 100 selects to connect the first link or the second link according to a preset optical network unit type, so as to implement flexible application of the optical network unit type configuration. And configuring a communication mode corresponding to the communication link according to the preset optical network unit type. The optical network unit types include various types such as EPON, GPON, 10G-EPON, XG-PON, XGSPON, etc.

In this example, the communication mode corresponding to the connectivity link is configured according to the preset optical network unit type by the control module. In this way, the multi-type BOB interface is realized on the ONU single board to communicate with the SFP optical module interface, and when the optical network unit type is replaced, the hardware design is not required to be carried out again, so that the time for hardware design, development and debugging is effectively reduced, the production cost is reduced, and the application scene of the optical transceiver unit is more flexible.

In summary, the present application designs a plurality of different communication links through the control module, the selection module and the optical module interface, determines a corresponding communication link and a communication mode adapted to a preset optical network unit type according to the preset optical network unit type, and realizes the communication link through selecting and welding the branch resistor. The optical transceiver unit provided by the application solves the problems that the corresponding circuit board is required to be designed according to each type of optical network unit in the prior art, and the cost is high because each circuit board can only be applied to a fixed scene. The method realizes the integration of interfaces (SFP optical module interfaces and multi-type BOB interfaces) corresponding to different optical network unit types on a single optical network unit circuit board, saves the time of hardware design, development and debugging, and reduces the production cost.

Second aspect

An embodiment of the present application provides an ONU device, including an optical transceiver unit according to any one of the embodiments of the first aspect. Fig. 5 is a schematic structural diagram of an ONU device according to an embodiment of the present application. As shown in fig. 5.

The ONU device includes a main memory, a read-only processor, a cache memory, and a processor, and components of the ONU device may include, but are not limited to: the at least one memory, the at least one processor 69. The ONU device shown in fig. 5 is only an example, and should not impose any limitations on the functionality and scope of use of the embodiment of the application.

The memory may include volatile memory such as Random Access Memory (RAM) 61 and/or cache memory 67, and may further include Read Only Memory (ROM) 62.

The processor 69 transmits data to the optical fiber interface 63 via the optical transceiver unit 64 according to the first aspect. Processor 69 may also transmit data to a lan interface through a lan switching unit. The user can access the external device to the device through the local area network interface, thereby realizing network communication. As shown, it should be appreciated that although not shown in the figures, other modules may be used in connection with the ONU device, including but not limited to: device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, data backup storage systems, and the like.

It should be noted that although several units/modules or sub-units/modules of an electronic device are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more units/modules described above may be embodied in one unit/module in accordance with embodiments of the present application. Conversely, the features and functions of one unit/module described above may be further divided into ones that are embodied by a plurality of units/modules.

Among them, ONU apparatuses are generally installed in the corridor, home, office, machine room, etc. of a user, for receiving optical signals and converting them into electrical signals for use by terminal apparatuses.

In summary, the ONU device provided in the present application determines, through the processor, a corresponding communication link and a communication mode adapted to a preset optical network unit type according to the preset optical network unit type, thereby solving the problem in the prior art that the cost is high because the corresponding circuit board needs to be designed according to each type of optical network unit and each circuit board can only be applied to a fixed scene. The method realizes the integration of interfaces (SFP optical module interfaces and multi-type BOB interfaces) corresponding to different optical network unit types on a single ONU circuit board, saves the time of hardware design, development and debugging, and reduces the production cost.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (9)

1. The optical transceiver unit is characterized by comprising a control module, a selection module and an optical module interface which are sequentially connected in a communication mode:

the optical module interface comprises a first interface and a second interface;

the matching module comprises a first link and a second link, wherein the first link is used for connecting the first interface and the control module in a signal manner, the second link is used for connecting the second interface and the control module in a signal manner, and the first link or the second link is in a communication state;

the control module is used for configuring a communication mode which is matched with one of the first link and the second link in a communication state according to the preset optical network unit type.

2. The optical transceiver unit of claim 1, wherein the first link comprises:

the first optional network unit is used for being electrically connected with the control module;

the second optional network unit is electrically connected with the first optional network unit and is also electrically connected with the first interface.

3. The optical transceiver unit of claim 2, wherein the second link comprises a first sub-link comprising:

the first optional network unit is used for being electrically connected with the control module;

the first functional module is electrically connected with the first optional network unit and is also electrically connected with the second interface.

4. The optical transceiver unit of claim 2, wherein the second link comprises a second sub-link comprising:

the first optional network unit is used for being electrically connected with the control module;

the second optional network unit is electrically connected with the first optional network unit and the second functional module;

the second functional module is electrically connected with the second optional network unit and is also electrically connected with the second interface.

5. The optical transceiver unit of any one of claims 3 or 4, wherein the first and/or second optional network units comprise: a signal branching circuit; the signal branching circuit includes:

the public end is used for connecting the control module;

the first branch end is electrically connected with the public end through a first resistor and is used for communicating the first link;

and the second branch end is electrically connected with the public end through a second resistor and is used for communicating the second link.

6. The optical transceiver unit of claim 5, wherein the signal branch circuit comprises a single-ended signal branch circuit and a differential signal branch circuit.

7. The optical transceiver unit of claim 3, wherein the first functional module comprises a drive unit, an optional network subunit, a symmetric unit, and an asymmetric unit:

the driving unit is electrically connected with the selected network subunit;

the selected network sub-unit is electrically connected with the symmetrical unit and is used for configuring the second interface to support the first optical network unit type;

the optional network sub-unit is electrically connected to the asymmetric unit and is configured to support a second optical network unit type by the second interface.

8. The optical transceiver unit of claim 4, wherein the second functional module comprises a driving unit and a functional unit:

the driving unit is electrically connected with the functional unit and is used for configuring the second interface to support a third optical network unit type.

9. An ONU device, characterized by comprising an optical transceiver unit according to any of claims 1-8.