1. Gigabit Ethernet Passive Optical Network
(gepon)
Presented by
Assignment Group- 2013/17/52
Batch- 2013/17 [11]
Tanmay Kedia
Monika Dubey
Venugopal
Saptrishi Gupta
Khumeshwari Sahu

2. Index FTTx Future of FTTH PON a Simple view
Advantages of PON Based Networks
Types of PON
GEPON Overview
Fundamentals of GEPON
Comparison Of GEPON With Other Broadband Access Technologies

3. FTTx TECHNOLOGY FTTP: Fiber To The Premises FTTH-Fiber To The Home
FTTX is of 4 types:
FTTP: Fiber To The Premises
FTTH-Fiber To The Home
FTTB-Fiber To The Building
FTTB: Fiber To The Desktop
FTTC: Fiber To The Curb
FTTN: Fiber To The Node
WHY CHOOSE FIBER?
High Information Carrying Capacity
Less Attenuation
Greater Safety
Immunity to -
Radio Interferences
Electromagnetic Interferences
Higher Security
Less Temperature Sensitive
Small Size and Light weight
No Cross Talk
More Bandwidth – Thousands of Channels
FTTx
FTTP
FTTD
FTTN
FTTC

4. The FTTH Access Network – OLTs In The Central Office, ONUs in CPEs

5. FUTURE OF FTTH
FTTH access networks will provide ample bandwidth for 5, 10 and even 20 years or more.
FTTH can redefine performance parameters to support future applications.
An example of this is support for Dynamic Bandwidth Allocation or DBA.
FTTH will provide different bandwidth priorities to subscribers so that different application service requirements can be supported.
For example, it may be critical for high-definition IP TV to have priority download of a time-sequenced video frame and not so critical for a user accessing . All GPON suppliers must have programmable DBA.

6. PON A SIMPLE VIEW
In a PON system, a single fiber connects multiple customers to a single transceiver at the central office (CO).
The single fiber is split, using a Passive Optical Splitter, to serve up to 32 customers.
Not only does PON reduce the amount of fiber required, but a single transceiver serves multiple customers instead of requiring one per customer.

7. WHAT IS PON ?
A Passive Optical Network (PON) is a point-to-multipoint, fiber to the premises network architecture in which unpowered optical splitters are used to enable a single optical fiber to serve multiple premises, typically
Passive Optical Network facilitates another (higher bandwidth) broadband access technology that competes with and complements xDSL, cable modem and fixed wireless. With a PON, optical fiber is deployed either all the way or almost all the way to the end user (VDSL). It is called Passive Optical Network because:
Network only consists of passive light transmission components (fiber links, splitters and couplers).
This creates great cost savings for the provider (more reliable and less costly to operate/troubleshoot).

8. Link Diagram of pon Based network

9. PON TERMINOLOGY
Optical Distribution Network ODN – An ODN realizes the optical transmission from the OLT towards the users and vice versa. It utilizes passive optical components.
Optical Line Termination OLT – An OLT is the service provider endpoint of a PON and is placed in a CO or head end
Optical Network Termination ONT – An ONT is a device that terminates the PON and presents native service interfaces to the user. An ONT is typically located on the customer’s premises.
Optical Network Unit ONU – An ONU is the PON-side half of the ONT, terminating the PON, and may present one or more converged interfaces, such as xDSL or Ethernet, toward the user. An ONU typically requires a separate subscriber unit to provide native user services such as telephony, Ethernet data, or video.

10. ADVANTAGES OF PON BASED NETWORK
Shared Infrastructure Translates To Lower Cost Per Customer
Minimal Number Of Optical Transceivers
Greenfield Per-customer Cost Similar To UTP
Passive Splitters Translate To Lower Cost
Can Be Installed Anywhere
No Power Needed
Essentially Unlimited MTBF
Fiber Data-rates Can Be Upgraded As Technology Improves
Initially 155 Mbps
Then 622 Mbps
Now 1.25 Gbps
Soon 2.5 Gbps And Higher

11. TYPES OF PON
There are various types of PONs. The general technology is the same. The differences are in the specifications and upper layer protocols.
APON :– ATM based PON uses ATM encapsulation of the transported data.
BPON :– Broadband PON succeeded APON and also uses ATM encapsulation. Supports superior features, higher speeds and was standardized by the ITU-T.
EPON or GE-PON :– Ethernet PON uses Ethernet for data encapsulation. Standardized by the IEEE in mid-2004.
GPON or Giga PON :– Gigabit PON uses a new Generic Encapsulation Method (GEM) transport layer that supports ATM, Ethernet and TDM data transport.

12. EVOLUTION OF TYPES OF PON
GPON 2,5GB
EPON 1,25GB
1000
BPON 622MB
SPEED [MB/s]
APON 155MB
100
PON 54MB
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
YEARS

13. GEPON OVERVIEW
Gigabit Ethernet PON is an attractive FTTH broadband access network technology because it meets the needs of carriers world-wide.
GE-PON has successfully demonstrated this approach and is being deployed in high volume in Asia. It is an access method transported by optical fiber, FTTx is a Point to Multipoint Access Topology in which one central point can reach from 32 to 128 premises. There are only two types of equipments the OLT (central) and the ONT’s (in Customer Premises). It includes all of the ingredients for market success –a consumer base that is eager to adopt a much faster and more comprehensive set of high-speed
services.

14. Fundamentals of GEPON Infrastructure
OLT
OLT
OLT
Optical Line
Optical Line Terminal (OLT)
• Acts as the central aggregation element.
• Located in the Core Data Center.
• Replaces multiple L2 switches.
• Can aggregate thousands of end users.

15. Fundamentals of GEPON Infrastructure
ONT
ONT
ONT
Optical splitter
1:32
Optical Line
Passive Optical Network (PON)
• Completely passive infrastructure
• Single fiber (1:32)
carries multiple wavelengths
2.48 Gbps downstream
1.24 Gbps upstream
Serve Remote Buildings Up to 20 Km

16. Fundamentals of GEPON Infrastructure
ONT
ONT
ONT
Optical Splitter
1:32
Optical Line
Passive Optical Splitter Feeding FDH
•Rack Mount or Cassette versions
• Splits single fiber up to 32 ways
• Can be located in the IDF/TR, under a raise floor, in a ceiling zone box, or in a manhole.
• The further the splitter is extended to the desk,
the greater the savings in fiber infrastructure .

17. Fundamentals of GePON Infrastructure
Optical Network Terminals (ONT)
• Terminates the fiber at the end user
• Provides Data, VoIP, IP Video services
• Some models also provide native POTS
• Desktop and MultiDesk Unit models
ONT
ONT
ONT
Optical Splitter
1:32
Optical Line

18. Edge Switches vs. Passive Fiber Splitter
AFTER
BEFORE

19. COMPARISON OF GEPON WITH OTHER BROAD BAND ACCESS TECHOLOGIES (DSL,VDSL, cable/modem)
ADVANTAGES
Long-term life expectancy of the fiber infrastructure
Lower operating costs through the reduction of “active components”
Support for greater distances between equipment nodes
Much greater bandwidth
DSL-certain megabits per sec
FTTH Technology-PON based Network speed ranges from 1.0 to 2.5Gbps

20. Since GEPON uses only passive components and therefore:
It has low power requirements
Less no of technicians
Cost savings upto 40-60%
Savings mainly result from lower customer contacts associated with service orders and trouble reporting, outside plant operations, central office operations, and network operations.
It provides high bandwidth for Hi-Speed Internet Access, Video On Demand, IPTV and Voice Over IP (VoIP) .

21. Thank You
For Your Time And
Consideration