What is OLT GPON ONU in Optical Fiber Network

GEPON OLT Configuration for Fiber Network

OLT, GPON, EPON, ONU, ONT all are equipment used in an optical fiber network to provide maximum and highest data transmission speed with minimizing network costing. OLT Device used at the start point of centralizing office node and ONU used at last endpoint to termination of the line. Between OLT and ONU fiber, Splitter and other passive network devices are used to distribute fiber networks. The GEPON OLT Configuration for Fiber Network very easy to understand if you follow a proper network diagram. Also, know how to protect your Network product from lighting.


OLT (Optical Line Termination )

The OLT also called Optical Line Terminal. OLT is an endpoint of the passive optical network (PON).

Huawei MA5608T configuration

OLT Main Function is converting electrical signal using by service provider equipment and Fiber optical signal used by the passive optical network (PON), its co-ordinate Multiplexing between end-user device ONU (Optical Network unit ) or ONT (Optical Network Terminals ).

The OLT installed Service provider end and client equipment use ONU or ONT for endpoint service providing. In the simple word its starts with OLT and End with ONU o ONT at Costumer end.


Fiber Network Solution with OLT and ONU
Huawei MA5608T – Mini OLT (Optical Line Terminal)


PON full form is Passive Optical Network, it’s used for point to multipoint network with fiber optical to reduce the costing of the fiber network.

Standard of PON :



1. GPON (Gigabit PON)

GPON is a new generation of broadband (BPON)over Passive network access. GPON provides high bandwidth speed up to 2.5Gbit/s. The protocols used by GPON are ATM, GEM, and Ethernet.

2. EPON (Ethernet PON)

full form of EPON is Ethernet Passive optical network.EPON is an IEEE standard, used Ethernet to sending the data packet. EPON and GEPON is a FAST Ethernet over fiber network up to 1.25 Gbit/s Download and upload data stream.


ONU full form is an Optical network unit and ONT Full form is an optical network unit. Passive Optical Network Consist of a centralized office node called OLT (Optical Line Terminal) and Endpoint Costumer Site used Equipment called ONU and ONT. Between OLT and ONU there is Fiber and splitter used to distribute fiber network.

ONU and ONT configuration with Huawei MA5608T OLT


While internet plan speed increases fiber takes over all the LAN network and wireless networks.  LAN and Wireless networks having a limitation to deliver speed to long-distance where Fiber can easily provide Hight SPeed internet plan up to 10 Gbps with the latest OLT technology.

Initial Fiber starts with the EPON OLT network which now upgraded to GPON OLT network and Gigabit ONT device for last-mile connectivity. fiber network can easily provide internet connection up to 20 KM or more depends on the fiber networks and device supported capacity.

It does not matter you are using DBC OLT, VSOL GPON Olt, Sysrotech OLT device or Huwaeie OLT device the connection method and configuration some based on Fiber technology.


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