Introduction of AON PON
Coaxial Cables are still using widely for delivery of Cable Tv Services. Which causes lot of signal loss with high maintenance cost. Each service provider is shifting his complete network on fiber due to its low maintenance cost. Which is also highly efficient than coaxial cables.
So for FTTH System (Fiber To The Home) there are two ODN adopting widely AON & PON according to need. Where ODN stands for Optical Distribution Network. So we will have comparison between AON & PON.
What Is AON
AON stands for Active Optical Network. It is based on point to point network distribution protocol for subscribers. Where each subscriber get his individual fiber for receiving the signal. Which results high bandwidth for each individual subscribers.
In this distribution network we uses the Active Splitters which needed the electrical power. These active splitters are called Switches.
What Is PON
PON stands for Passive Optical Network. It is based on point to multipoint Network Distribution protocol for subscribers. Where optical fiber cable is shared between subscribers. Which results less bandwidth for each subscriber.
In this distribution network Passive Spliters are used. These passive splitters do not need any external electrical power to work. These passive splitters works on bi-directional functionality. Where it can be used for upstream of data and downstream of data as well.
Difference Between AON PON
(1) AON have high bandwidth allocation to each subscriber in comparison with PON. Because individual fiber is used per subscriber for AON while fiber is shared between subscribers in PON distribution network.
(2) AON uses the active splliters which are more efficient than passive splitters used in PON.
(3) AON is more costly in comparison with PON. Because components used in AON like Switch is more costly then the passive splitter.
(4) Fault detection is easy in Active Optical Network in comparative to Passive Optical Network.
(5) Maximum distance between OLT and ONT can be 90 Km while in case of PON it can be 20 Km.
(6) AON system consume more power than PON system.
(7) Additional services can be provided in AON system more easily than PON.
(8) Up-gradation in AON system is easy in comparative with PON where whole fiber tree is affected from update.
(9) AON requires high maintenance than PON system. Because in AON active devices are used which require external power. While on the other hand PON system needs less maintenance because there is no need for external power for splitters.
(10) Passive Optical Network needs lot of fiber cable space for distribution while in case of AON its not.
(11) Network Roll out cost is high for Active Optical Network while in case of Passive Optical Network, Network Roll Out cost is different.
Conclusion
AON and PON are the optical distribution techniques for delivery of services like audio, video and broadband etc. So these two terms comes under ODN (Optical Distribution Network). Active Optical Network is used for large distance areas up to 90 Km whereas Passive Optical Network is used in small distance areas upto 20 Km. Where Passive Optical Network works on shared fiber system while Active Optical Network works for dedicated fiber system.
Both of these two distribution techniques have different costing and reliability deployed according to need for FTTH solution.
Know More About What Is GPON
reference : mark jackson
