EPON/GPON/XPON Solution

1. Technical Introduction

PON, a point-to-multipoint fiber access technology, which includes ATM PON, Broadband PON, Gigabit PON and 

Ethernet PON, consists of the OLT (Optical Line Terminal) on the side, the ONU (Optical Network Unit) on the user

 side, and the ODN (Optical Distribution Network), is a kind of FTTX Main technology. EPON/GPON is the current 

mainstream market demand. 

EPON/GPON can support a variety of services, including: voice and Internet services, video, data, HDTV, video

 communications, Multi-play services, Provide higher bandwidth, longer range, wider and more stable broadband

 coverage.

 

2. Network Architecture

The OLT is a switch or router as well as a multi-service provisioning platform that provides a fiber interface for

 passive optical networks. In addition to providing network convergence and access functions, the OLT also 

provides bandwidth allocation, network security and management configuration for different QOS / SLA 

requirements of users.

Optical Splitter is a simple device without power supply .A typical splitter split rate of 2, 4, 8, 16 and 32, and 

can be multi-level connection. The distance between the OLT and the ONU can be up to 20 km, and the distance

can be extended by used an optical fiber amplifier (active repeater).

EPON uplink and downlink are 1.25Gbit/s rate, abide by IEEE. GPON uplink is 1.25Gbit/s rate, downlink is 2.5Gbit/s,

 basic on ITU-T G.984.

PON Principle: Downstream using broadcast mode, uplink using time division multiple access mode, single-fiber 

bi-directional transmission, full-duplex passive optical network IP data uplink wavelength 1310nm, downlink 1490nm.

3. Transmission principle

Downstream:  Broadcast way

Upstream:  Time-division multiplex

4. Mature residential broadband access wiring diagram

5. Project description

5.1.1  OLT

（1）ATEL GPON OLT provides 8 downlink GPON port, 4*10Gigabit SFP ports and 4 uplink GE ports. Height only 1U, 

easy installation and maintenance, save space.

Up to 1: 128 splitting ratio, support different types of ONU hybrid network, which minimize the operator's investment. 

（2）ATEL EPON OLT provides 8 downlink 1000M PON ports, 4 uplink GE RJ45 ports and 2

uplink GE SFP ports, which height is only 1U for easy installation and space saving. Each PON supports up to 64 

terminals(ont/onu), the whole device supports up to 512 ONUs under full configuration.

5.1.2  ONU

ATEL ONU includes a variety of models, according to the access way ,it is divided into two fiber access and one

 fiber access type two kinds, and all parameters such as input optical power and output RF level etc can be read

 from web or OLT.

5.2  Passive components

6. ATEL products

6.1  ATEL products for CO

（1）Standard Rack       

（2）GPON /EPON OLT

（3）PON/SFP module

（4）Patch cord

        SC/UPC-SC/UPC SM G657B LSZH patch cord

        LC/UPC-LC/UPC SM G657B LSZH patch cord

（5）ODF panel

6.2  ATEL products for LCP

（1）Max capacity: 576 cores Fiber optic interconnect cabinet

（2）Closure

6.3  ATEL products for DP

（1）PLC  fiber optical Spliter

（2）144 cores Fiber optic ODF cabinet  

（3）ODF cabinet within PLC Cassette 

6.4  ATEL products for Home

（1）FTTH 24-core PC alloy fiber optic distribution box

（2）Fiber optic cable

（3）ONU