Hi Ankita,
I also would like to share FTTH Access Topologies:
—Tree architectures
Passive Optical Network (PON) technology
—-Star architectures
Point-to-point connection of customers to
switches in a star topology
As we have discussed about BPON, GPON, EPON.
Main Issues with PONs
Data sent to all users on the tree: inefficient Video multicast & VoD
IGMP Proxy and snooping with limited support. IGMP process distributed between OLT(Proxy) and ONT(Snooper)
instable. Zapping degrades with large number of channels selected. No state of IGMP on ONT kept. Troubleshooting
by “mirroring” PONT tree, no focus on one sub (trace per user) possible Asymmetrical
All FTTH deployments that we are aware of universally assume a take rate of 25…35%. Only 25-35% of
interfaces need to be accommodated on switches in a Eth. P2P scenario rather than 100% in PON.
Strong encryption required to prevent eavesdropping.
So, we have shifted towards other technologies too.
Thanks,