ONU classification

In general, ONU devices can be classified according to various application scenarios such as SFU, HGU, SBU, MDU, and MTU.

1. SFU type ONU deployment

ONU

The advantage of this deployment method is that the network resources are relatively abundant, and it is suitable for independent households in FTTH scenarios. It can ensure that the user end has broadband access functions, but does not involve complex home gateway functions. The SFU in this environment has two common forms: provide both Ethernet interface and POTS interface; provide only Ethernet interface. It should be noted that in these two forms, the SFU can provide the coaxial cable function to facilitate the realization of CATV services, and can also be used in conjunction with the home gateway to facilitate the provision of value-added service functions. This scenario is also applicable to enterprises that do not need to exchange TDM data.

2. HGU type ONU deployment

The deployment strategy of the HGU type ONU terminal is similar to that of the SFU type, except that the functions of the ONU and the RG are integrated in hardware. Compared with SFU, it can realize more complex control and management functions. In this deployment scenario, the U-shaped interface is built into the physical device and does not provide an interface. If an xDSLRG-type device needs to be provided, multiple types of interfaces can be directly connected to the home network, which is equivalent to a home gateway with an EPON uplink interface. Applied to FTTH occasions.

3. SBU type ONU deployment

This deployment solution is more suitable for the network construction of independent enterprise users in the FTTO application mode. It is an enterprise change based on SFU and HGU deployment scenarios. The network in this deployment environment can support the function of broadband access terminals, and provide users with a variety of data interfaces including El interface, Ethernet interface, and POTS interface, which can meet the needs of enterprises in data communication, voice communication, and TDM private line services. Usage requirements. The U-shaped interface in the environment can provide the enterprise with a frame structure with various attributes, which is more powerful.

4. MDU type ONU deployment

This deployment solution is suitable for multi-user FTTC, FTTN, FTTCab, FTTZ and other multi-application network construction. If enterprise-level users have no demand for TDM services, this solution can also be used for EPON network deployment. This deployment solution can provide multiple users with broadband data communication services including Ethernet/IP services, VoIP services, and multi-service modes such as CATV services, and has powerful data transmission capabilities. Each communication port can correspond to a network user, so the network utilization rate is higher in comparison.

5. MTU type ONU deployment

This deployment solution is a commercialized change based on the MDU-type deployment solution. It can provide multiple interface services including Ethernet interfaces and POTS interfaces to multiple enterprise users, and can meet the enterprise's voice, data, TDM private line services and other services. need. If the socket-type implementation structure is used in combination, richer and more powerful business functions can be realized.