What is GEPON Technology? What is the Work of an OLT?

GEPON stands for Gigabit Ethernet Passive Optical Network. It is a type of optical access network technology that uses point-to-multipoint architecture and passive optical fiber transmission to provide varieties of services over Ethernet, also known as EPON.

GEPON is composed of the Optical Line Terminal (OLT), Optical Distribution Network (ODN), and Optical Network Unit (ONU). GEPON is an excellent combination of Ethernet technology and passive optical network technology. Eliminating the usage of active fiber optic components between OLT and ONU, it helps in cutting the cost, making the network easier to maintain.

GEPON systems are designed for telecommunication use. GEPON uses WDM technology and it is with 1Gbps bandwidth and can work up to 20km working distance. GEPON devices are entirely compliant to iEEE802.3ah, this series of products features powerful integration, flexible applications, easy management and provides QoS functions. Its fiber network speed can reach up to 1.25 Gb/s and each EPON OLT system can distribute into 32 remote ONU to build up the fiber capacity of data transmission, high security, with the flexibility of the buildup network.

What is Olt?

Optical Line Termination (OLT) is an endpoint hardware device in a passive optical network (PON). It can also be called an optical line terminal - a device that serves as the service provider endpoint of a passive optical network.

OLT is located at the provider’s central office. It transmits data to users at 1310 nanometers (nm). The signal passes through splitters and can serve up to customers at a range of approximately 20 kilometers or 12.5 miles. A single OLT can serve thousands of customers and can be centralized in the campus environment.

Functions of OLT

OLT is generally employed for a terminal connection to the fiber backbone. OLT works on two primary functions -

• Converting the standard signals use by FiOS service provider to the frequency and framing used by the PON system

• Co-ordinating the multiplexing between the conversion devices on the optical network terminals located on the customers’ premises.

Role of OLT in GPON Network

As the two functions of OLT are mentioned above, the main function of OLT is to control the information float across the optical distribution network (ODN) moving both directions while being located in a central office. The maximum distance supported for transmitting across the ODN is 20 km. OLT with two float directions:

upstream - getting and distributing different types of data and voice traffic from users

downstream - getting data, voice, and video traffic from the metro network or a long-haul network and sent to all ONT modules on the ODN

OLT is devised for controlling more than one PON. If every PON has 32 connections, OLT can scatter data to 128 ONTs. OLT has specific standards and so it can work with ONT from different manufactures.

Conclusion

OLT has widely been adopted in fiber-optic network access. It can efficiently be used to reduce network construction costs while simultaneously providing a guarantee on high bandwidth and high integration. OLT plays an important role in GEPON networking.

We hope this blog is informative and appeared useful to you. For more information check our website Santron Electronics

If you have any doubts or queries relating to GEPON or GEPON OLT or its functions, feel free to contact us.

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