1. Understanding GPON By
Adnan Umar

2. Objectives At the end of this module participants will be able to:
List the benefits of FTTH
Understand the PON
Understand the GPON architecture
Describe the key features of GPON

3. Copper Based Access Networks
Optimized for a single service
Can support data rates 20+Mbps
Future demand for next generation services is 40+Mbps

4. Source:

5. Think of a technology --- having
Unlimited bandwidth
Future proof
Long distance coverage
Can support bandwidth hungry multimedia services over IP
i.e. VOIP, HDTV, VOD, access to HSI etc. involving
(voice + video + data)
All services via bundle offering

6. FTTH
100 % fiber in AN

7. FTTH? Old networks, optimized for voice 24 kbps - 1.5 Mbps
Copper
Fiber //
CO/HE
CO/HE //
Old networks, optimized for voice
24 kbps Mbps
19 Mbps - 1 Gbps +
Optical networks, optimized for voice, video and data
CO/HE //

8. “An OAN in which the ONU is on or within the customer’s premise.”
FTTH – 100% Fiber Network
“An OAN in which the ONU is on or within the customer’s premise.”
OAN: Optical Access Network
ONU: Optical Network Unit (CPE)
OLT: Optical Line Termination
CO/HE //
ONU
OLT
OAN
Source:

9. FTTH Active Network
OLT //
ONU // //
Processing (powered)

10. FTTH Passive Optical Network
OLT // // // // // //
Optical splitter
1x16 (1x2, 1x8)
1x32 (1x4, 1x8)

11. Hybrid Networks
Processing (powered)
OLT // //
Optical splitter

12. FTTH network realizations
Active networks
Subscribers have a dedicated fiber optic strand
May use active (powered) nodes to manage signal distribution
All passive network
Shares fiber optic strands for a portion of the networks distribution
Uses optical splitters to separate and aggregate the signal
Power required only at the ends
Hybrid networks
Literal combination of an Active and a PON architecture

13. FTTH Standards

14. FTTH - STANDARDS ITU-T G.983 APON (ATM Passive Optical Network).
First Passive optical network standard.
Used primarily for business applications
was based on ATM (Asynchronous Transfer Mode)
Initial offering Mbps Downstream, Mbps upstream.
BPON (Broadband PON)
Standard based on APON architecture.
It adds support for WDM, dynamic and higher upstream bandwidth allocation.

15. FTTH – STANDARDS -cont ITU-T G.984 GPON (Gigabit PON)
An evolution of the BPON standard.
Supports higher rates,
Enhanced security,
GPON uses IP-based protocols to transfer data.

16. FTTH – STANDARDS-cont IEEE 802.3ah - 1.25 Gbps Symmetrical.
EPON or GEPON (Ethernet PON) is an IEEE/EFM standard for using Ethernet for packet data.
There are currently over 15 million installed EPON ports.
EPON uses IP-based protocol to transfer data.
Gbps Symmetrical.