I am looking to buy 10G-EPON OLT.

Hello Everyone, I currently have 1.25G-EPON OLT and I want to upgrade to the 10G-EPON OLT. So here are my questions.

1. Does 10G-EPON OLT have a 1:128 splitting ratio?
2. Will my existing EPON ONU work on this new OLT?
3. Can I use XPON ONT on this new OLT. Will my existing XPON ONT will work on this new OLT?
4. Where can I buy this OLT and what will be the expected price?

I searched for the 10G-EPON OLT and came across this Telesail TP5500-10G EPON OLT, 8 PON Ports Layer 3 Ethernet. It is saying to have a 1:128 splitting ratio on EPON OLT. I need the OLT to be shipped to India. (Sorry for my bad English)