• PON: Passive Optical Network
• EPON: Ethernet Passive Optical Network
• GEPON: Gigabit Ethernet Passive Optical Network
• OLT: Optical Line Terminal
• ONU: Optical Network Unit
• POS: Passive Optical Splitter

EPON (Ethernet Passive Optical Networks) or GEPON (Gigabit Ethernet Passive Optical Networks), also known as Ethernet PON is an access layer technology to connect the internet for the users through an optical fiber. This technology is based on a fiber network that renders fast data transmission and lowers data packet loss. GEPON technology supports up to 20 km. The downstream is broadcast and upstream is TDMA technology. From OLT to ONU the data packets are broadcasted and from ONU to OLT, each ONU is assigned time slots to fetch data using TDMA (Time Division Multiple Access) technologies which avoid the collision.

It is true that the OLT and the ONU are active devices, which need power input, but logically the whole GEPON network is based on Optical Fiber network. Fiber split ratio is determined and calculated to connect the number of ONUs. This fiber network is PASSIVE network, where no active power is required. Hence, majority network design is on optical fiber and thus, GEPON is called A Passive Optical Network Technology.

GEPON technology is designed to supports 20 kilometres by standard.

The distance, GEPON supports is dependent on the split ratio of the optical fiber. Current EPON systems are designed as per 1*32 split ratio which can support up to 20kms. The further split will render shorter distance coverage. Also, it is widely dependent on the ONU optical receiving sensitivity which in general is -26 dBm. Hence, as per the technology standard calculations/specifications, the current GEPON system can support a maximum of up to 20 km.

There are various chipset OLTs available. With respect to Optilink OLTs we use,
OP-EOLT 97042P (2 PON Port OLT) - TK chipset
OP-EOLT 97084P (4 PON Port OLT) - Cortina Chipset OLT
OP-EOLT-97168P (8 PON Port OLT) - Cortina Chipset OLT

There are various chipset ONUs are available. We use TK, Cortina, ZTE, BroadCom and Realtek chipset ONUs.

ONU compatibility depends upon ONU CTC version. We have expertise in our Research and Development, which observe strong testing parameters and make the ONUs compatible with Optilink OLTs.

As per standard, all chipset ONUs can work with Optilink OLT. We cannot assure you that other brand ONUs be compatible with our OLT.

GPON: GPON stands for Gigabit Passive Optical Networks. It is a point-to-multipoint access mechanism.
Its important attribute is the use of passive splitters in the fiber distribution network, enabling one single
fiber feed from the provider's central office to serve multiple homes and small businesses.

GPON which is explained in ITU-T recommendation series G.984.1 through G.984.6 GPON, has a
the downstream capacity of 2.5 Gb/s and an upstream capacity of 1.25 Gbps that is shared among users.
Encryption is used to keep each user's data secure and private from other users.

A GPON network consists of OLT (Optical Line Terminals), ONU (Optical Network Unit), and a splitter.

GEPON: GEPON stands for Gigabit Ethernet Passive Optic Networks. It is composed of the Optical Line
Terminal (OLT), Optical Distribution Network (ODN) and Optical Network Unit (ONU). GEPON is a
perfect combination of Ethernet technology and passive optical network technology. It eliminates the
usage of active fiber optic components between OLT and ONU, this will greatly cut the cost and make
the network easier to maintain. GEPON use WDM technology and it is with 1Gbps bandwidth and up to
20km working distance.

CTC is China Telecom. It is a standard derived for the ONUs as per China government. CTC is responsible for compatibility with different devices and also networking features an ONU can support.

We offer to have a network with same chipset devices but, since every chipset has its own advantages commercially and also with respect to networking requirements, we offer variety of ONUs to chose with.

• OLT device at the control room.
• ONU device for clients.
• PON SFP module.
• POS (Passive Optical Splitter).
• Fiber patch cord.
• Fiber power meter.
• A trained Fiber operation team.
• Laptop/PC system to monitor.

• OP-EOLT 97042P - 2 PON port OLT
• OP-EOLT 97084P – 4 PON port OLT
• OP-EOLT 97168P – 8 PON port OLT
• OP-EOLT 97016P – 16 PON port OLT

PON SFP optical out ranges from +3 dbm to +5 dbm. The range varies as per module laser individually.

Yes, you can use any module which supports EPON standards provided it is compatible with Optilink OLT.

OLT flash memory is 128MB.

It is recommended to use PLC (Planar Lightwave Circuit) fiber splitter meant for GEPON technology.

Yes, we can use the fiber splitter used in a cable TV network. We recommend using standard PLC Splitter meant for GEPON technology for a better network.

Yes. We have combo ports for UPLINK. You can use either fiber port or Ethernet port for input.

OLT supports RSTP. We recommend not to have OLT in ring as ring should always be on the Switching network. OLT is an access layer device. Always redundancy has to be on switch and below each switch, OLT should be connected.

NO. PON port supports 64 LLID (Logic Link Identification).

By standard, a particular PON port on an OLT supports 64 ONUs, so 65th ONU technically will not connect/register if all 64 ONUs is online at the same time on the OLT.

LLID is Logic Link ID. GEPON technology works on TDMA technology from downstream. ONUs observe TDMA technology, each ONU sends request in the prescribed time slots.

YES.

YES.

OLT support standard IEEE802.1 Q protocol. Optilink OLT supports VLAN1- 4094.

GEPON is FTTH solution. Also GEPON is bandwidth sharing device. The number of clients connected on GEPON will fetch bandwidth from OLT. We recommend to connect minimum user after ONU for best FTTH solution and to have network free from bandwidth choking.

Yes, ONU comes in 2 different modes, as Bridge mode and Router board mode. You can configure static IP, DHCP and PPPoe config on ONU with router board. Here we ask you why? You are losing on to some important factors in your network. To know the factor please contact our respective sales representative. We are happy to help you.

Yes, ONU port is of 1GE. You can assign 2Mbps, 10Mbps and much higher plans on ONUs. You can also assign 100Mbps Broadband plans.

There are many different switches used to build networks:

LAN Switch: Switches that are used to connect a company's internal LAN system. It is also known as an Ethernet switch or a Metro Ethernet Switch.

Unmanaged Switches: Unmanaged Switches are used in home networks, small companies and businesses

Managed Switch: This is a type of Metro Ethernet Switch that can be customized to enhance the functionality of the network. These switches are called as Smart switches

In addition to the above Metro Ethernet Switch there are some advanced switches such as PoE Switches and Stackable switches.

Media Converter converts and extends signals within your Ethernet network beyond the 100-meter limit imposed by copper cable. It improves the potential of present fiber with WDM wavelengths. Media converters are devices used to connect two LANs or devices that are not entirely relatable, due to operation types, different speeds, modes or media types (twisted pair, fiber, coax). They are most commonly used to insert fiber segments into copper networks.

It helps to integrate new technology with existing equipment to support new technologies, applications and future growth. Extend the productive life of your existing cable as well as the active equipment without costing, across-the-board upgrades.

Metro Ethernet Network that is made out of Metro Ethernets. It is an Ethernet transport network that provides a point to point or a multipoint connectivity service that runs on a Metropolitan Area Network. (MAN). This is the ethernet that originated as a LAN (Local Area Network) and has slowly become a replacement for low speed WAN technologies.

Metro Ethernets are basically Ethernet services provided in Metropolitan areas such as the City or Urban areas. These ethernet networks make use of different kinds of Metro Ethernet Switches to facilitate network protocols and services. These ethernet services provide connectivity for operating corporate offices, schools, universities, etc.

PLC Splitters stands for Planar Lightwave Circuit Splitters.

A PLC (Planar Lightwave Circuit) is a micro-optical component based on planar lightwave circuit technology and provides a low-cost light distribution solution with a small form factor and high reliability. They are used to separate or combine optical signals.

PLC Splitters are installed in each optical network between the PON Optical Line Terminal (OLT) and the Optical Network Terminals (ONTs) that the OLT serves. Networks implementing BPON, GPON, EPON, 10G EPON, and 10G GPON technologies all use these simple optical splitters. In place of an optical splitter, a WDM PON network will use an Arrayed WaveGuide (AWG).

There are 3 different types of Networks: 

LAN- Local Area Network

MAN -Metropolitan Area Network

WAN: Wide Area Network

LAN is a type of network that is used in schools and colleges, or offices. Personal computers are connected in a network to share files and resources

MAN is an area network that spans different cities and towns. It connects the networks of various metropolitan areas together. An example is the network used in your city

WAN is an area network that is spread across different countries or continents. It is the entire Internet or World Wide Web taken together.

SFP stands for Small Form-factor Pluggable transceiver. It is compact and used for data communication applications.