ONU (optical network unit)，The Ultimate Guide

In the application of FTTx technology, the ONU (optical network unit) is the device closest to the user in the “last mile” of the new generation of Internet technology. How to efficiently configure and manage it and correctly deliver user-customized services is directly related to whether the user can Browse the Internet.

This article specifically describes different types of ONU products and their comparisons. Provide a detailed reference for your purchase of ONU products.

As a TUV certified factory with 27 years of production and design experience, Melontel can provide you with all the ONU products mentioned in this article. Provide a strong product guarantee for your FTTX development.

ONU is an optical network unit, which is placed on the user side and provides a variety of service interfaces to realize comprehensive user access. One ONU can access up to 64 users. The ONU terminates the information from the ODN, and completes the electro-optical and optical-electrical conversion, signal processing, multiplexing, and maintenance and management functions between the optical ports on the network side.

The ONU is the key device in the PON access network. Since the ONU upload adopts the principle of time division multiplexing, any ONU lighting abnormally will cause OAM (operation management and maintenance) confusion, so that the ONU under the OLT port cannot work normally. To remove the fault, you need to unplug and plug the ONUs under the OLT port one by one, and at the same time, run the command to check the FER/BER of the ONU to determine the abnormal ONU and replace it, so that all the ONUs under the OLT port return to normal operation.

At the same time, because the ONU requires a narrow range of optical power, it is necessary to strictly control the splicing attenuation, otherwise the ONU will work at the edge of the critical value of optical power. With the aging of equipment and lines, the ONU may frequently UP/DOWN, which affects the application of users.ONU （Optical Network Unit） : Indoor wiring method

In the construction of FTTH, how to install ONU （Optical Network Unit） at home is a very important part, and it is also a confusing part in the implementation of projects in various places. In many cases, the needs of users are not fixed. During the implementation of the project, the leather cable can only be laid to the comprehensive information box or weak current box reserved by the developer. The specific installation method of the ONU （Optical Network Unit） needs to be guided by the customer or the user during the decoration. It was negotiated on the spot when the machine was installed. In order to solve such problems, we now analyze and compare various types of FTTH household methods.

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Due to the wide variety of ONUs currently used, the configuration channels used by different types of ONUs are different, and even the same type of ONUs have different configuration channel establishment processes.

The EPON ONU configuration management technology is based on the NGPON system currently being developed by the project team, aiming at authorizing operations and opening services for different types of ONUs.

Between the configuration management layer and the driver layer that communicates with the ONU, the ONUs with different capabilities are classified, and then different configuration channels are selected to deliver the configuration, so as to achieve the unification of the software layer.

When delivering service configuration, different ONUs use different parameters. Extracting specific VLAN modes by logically judging user service configuration data, configuring link flow mapping rules, and adding an adaptation layer to improve ONU configuration execution efficiency are the main points of this paper. of innovation.

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Conform to ITU-T G.984 GPON standards.
Support Ethernet service layer 2 switching and wire-speed forwarding of uplink and downlink services
Support frame filtering and suppression
Support standard 802.1Q Vlan function, support VLAN conversion
Support 4094 VLANs (802.1Q)
Support Dynamic Bandwidth Allocation (DBA) function
Support QoS, including traffic flow classification, priority marking, queue and dispatch, traffic shaping and traffic control, etc
Single ONU supports up to 1 LLID.
Support IGMP Snooping
Support Ethernet port ratelimit loop detection
Support power failure alarm

1.No. of Fiber: 12
2.Color: White Interface
3.Protocol: E1,FE,GE,STM-1,STM-4,STM-16
4.Certificate: SGS CE ROHS FCC
5.Firmware: English version
6.Application: Fiber to the home
7.Material: Plastic
8.Accessories: Adapter 12V
9.Function: Fiber signal transmission

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HG8346M is an Optical Network Terminal (ONT), which is a high-end home gateway in the FTTH solution. Utilize GPON technology to provide ultra-broadband access for home and SOHO users. HG8346M provides 2 POTS ports, 4 FE adaptive network ports and 1 Wi-Fi port. The HG8346M features high-performance forwarding to ensure an excellent VoIP, Internet and HD video service experience. Therefore, HG8346M provides a complete terminal solution and future-oriented business support capability for FTTH deployment.

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GPON ONU is a single-port ONU. GPON ONU is an xPON series terminal equipment that fully complies with the ITU-G.984.1/2/3/4 standard and meets the G.987.3 protocol for energy saving. Based on mature, stable and cost-effective Gigabit GPON technology, it adopts High-performance xPON Realtek chipset with high reliability, easy management, flexible configuration, robustness, and good quality of service assurance (QoS).

GPON ONU supports G/E PON automatic identification and mutual conversion function.

XPON ONU is an xPON series terminal equipment that fully complies with ITU-G.984.1/2/3/4 standards and meets G.987.3 protocol energy-saving. XPON ONU is based on mature, stable, high-cost-effective XPON technology and adopts high-performance xPON REALTEK chips It has high reliability, easy management, flexible configuration, robustness, and good quality of service (QoS).

XPON ONU supports both WIFI4 (IEEE802.11b/g/n) and WIFI5 (IEEE802.11ac), and the provided WEB system simplifies the configuration of WIFI and facilitates users to connect to the Internet.

XPON ONU automatically supports G/E PON switching function.

XPON ONU supports RJ11 interface for VOIP application.

3434GE2 ONU is an XPON series terminal equipment that fully complies with ITU-G.984.1 / 2/3/4 standards, compliant with the G.987.3 energy saving protocol, based on mature, stable, high-efficiency GPON technology, using the high-performance XPON ZTE chipset, it has high reliability, easy management, flexible configuration, reliability and good quality of service (QoS).

The 3434GE2 ONU supports WIFI4 (IEEE802.11b / g / n) and WIFI5 (IEEE802.11ac). At the same time, it provides a WEB management page to simplify WIFI setup.

3434GE2 ONU has an automatic conversion function EPON and GPON, which is implemented by Pure software.

Meanwhile, ONU supports two ports for VOIP applications.

G-140W-MD GPON ONU is an optical network terminal for home and SOHO users.

G-140W-MD GPON ONU provides one POTS port, three FE adaptive Ethernet ports, and one GE port (ONT), which is a high-end home gateway in FTTH solution. Using GPON technology, it provides E-adaptive Ethernet port and 1 Wi-Fi port for ultra-broadband access.

The G-140W-MD GPON ONU features high-performance forwarding to ensure an excellent VoIP, Internet and HD video service experience.

Therefore, G-140W-MD GPON ONU provides a complete terminal solution and future-oriented business support capability for FTTH deployment.

Learn more about FTTH Accessories, Everthing you need to know

At present, most of the newly built residential houses are equipped with comprehensive information boxes or weak current boxes, but the information boxes installed by most developers are small in size, and the original cable TV and other cables occupy a large space, which is not enough to install ONU （Optical Network Unit） equipment. In this case, when FTTH is constructed, the leather cable should be laid in the information box installed by the developer.

After the house is handed over in the community, the community manager guides the users to purchase a large-size comprehensive information box (recommended 350mmx300mmx120mm) by themselves through the “FTTH User Indoor Wiring Instructions” method, and slot a new information box above the existing developer’s installation information box. All kinds of broadband and voice cables are gathered here, and mains electricity is reserved for people.

At present, the wall-embedded equipment boxes are rarely used in FTTH construction, and most of them use fiber optic panels. The main reason is that the equipment box has a large investment and is relatively difficult to construct.

For new houses, it is recommended that this part of the investment be transferred to the residents. When the new house is renovated, the community manager will conduct extensive publicity, explain the door, the advantages of FTTH and the decoration instructions. The sales department can also act as an agent for equipment boxes or purchase compliant equipment boxes for users.

In this way, it can solve the problem of the user’s ONU （Optical Network Unit） installation location and mains attracting, and can save the investment of the information box. This method is relatively simple to connect, the indoor wiring is neat and orderly, and the ONU （Optical Network Unit） equipment is concealed, which is more beautiful, and is an ideal information-based home solution.

For some situations where the commercial power supply is not reserved at the comprehensive information box, the POE reverse power supply method can be used to solve the problem when the service is opened.

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In the project, the leather cable is generally reserved in the weak current box/box, but due to various reasons, it is impossible to slot a new compliant comprehensive information box. At this time, it is necessary to use the fiber optic panel. Considering the future triple play business requirements, it is recommended to install the fiber optic panel on the TV background wall of the user’s home, and the ONU （Optical Network Unit） is exposed.

When the client is decorating, the community manager should guide the client owner to pre-buy an 86 bottom box at the TV background wall, bury a hidden pipe from the TV background wall to the weak current box, and at the same time connect the leather cable (apply to the community manager, Or provided by the community manager to the developer/property, and the owner applies to the developer/property) through the dark pipe, and other broadband and voice cables of the user should also be laid to the TV background wall. When the user installs the machine, the installation personnel only need to cold connect the leather cable at both ends and terminate the leather cable at the light panel to connect.

In this way, the later installation and construction are more complicated, and the ONU （Optical Network Unit） is exposed, which is not very beautiful, but it saves the cost of the comprehensive information box, and it is an economical information-based home solution. For the transformation scene, the fiber optic panel method is also applicable, except that the cable from the household leather cable to the TV background wall section needs to be installed.

At present, there are four main ways of human-end connection of the leather cable: L-type quick connection; direct connection with the quick connection plug; the cable is connected in 86 boxes by cold connection; the leather cable is connected with pigtail or high-strength jumper. The wires are connected by cold splicing.

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This paper discusses and analyzes the problems of indoor wiring methods and optical fiber termination in the process of FTTH construction, and puts forward some ideas and suggestions, hoping to be beneficial to the development and construction of FTTH for operators.