OLT equipment HTGD-E8120T is a large-scale, rack-mounted G/EPON central office equipment introduced by HTGD, which is a carrier-grade G/EPON broadband access equipment provided for telecom operators.The product adopts serial high-speed bus architecture and modular design concept, combined with the industry's most advanced manufacturing technology, the product has high-density ports, high reliability and quality of service (QoS) guarantee, easy to open, easy to manage, compact structure, It has the advantages of rich service types and flexible network expansion.The access device is generally located at the edge of the access network, directly connected to the end user, and located between the user and the convergence layer device.This product is suitable for the application of FTTH/FTTO and other optical fiber access occasions. It is usually placed in the residential area or central office equipment room. It provides users with data, voice, IPTV, CATV, TDM on a single fiber through the advanced single-fiber three-wave technology. and other network services.The equipment has the following characteristics.●Large capacity: HTGD-E8120T as a Gigabit IP switching platform, it has up to more than 40G core, more than 90G backplane switching capacity.●Abundant interface types: HTGD-E8120T can provide two 10/100/1000M (optical/electrical) uplink interfaces, which can carry data, circuit-switched voice, soft-switched voice, IPTV, CATV, TDM, etc. business.HTGD-E8210TOLT equipment is a new generation of miniaturized EPON equipment. It is a carrier-grade FTTH broadband access equipment provided for telecom operators. It is an ideal last mile FTTH solution for operators, which can effectively reduce the cost of operation and investment by adding more end users.HTGD-E8210T integrates the EPON system based on the latest IEEE802.3ah standard, and the uplink and downlink rates of its optical lines can reach 1.25G bit/s.Each PON port can transmit Ethernet data through an optical splitter with a maximum split ratio of 1:32, through optical fibers and 32 EPON remote ONU devices to form a passive optical network to transmit Ethernet data, with large transmission capacity, good confidentiality, and networking. It has the advantages of flexibility, saving fiber line resources and the number of central office equipment.The system is mainly composed of OLT, ONU and splitter. OLT provides 4 upstream ports to IP network and 4 EPON downstream ports at the same time, each port supports 32 optical splits on a single fiber, so a single OLT equipment can support 128 ONU users. The transmission distance can reach 20km.Its height is only 1U, and the installation is convenient and flexible.ONU equipment ONU is the user-side equipment of the G/EPON system, and is used to terminate the services transmitted from the OLT through the PON.In cooperation with the OLT, the ONU can provide various broadband services to connected users.Such as Internet, VoIP, HDTV, VideoConference and other services.As a user-side device for FTTx applications, ONU is a high-bandwidth and cost-effective terminal device necessary for the transition from the "copper cable era" to the "optical fiber era".