hapi Normally the uplink port of OLT will not use 1GE port,but more often 10G port or aggregation uplink port together to get higher upload bandwidth. But better to use 10G port as uplink.
I don't sure what kind of OLT current Czechic telecom and ISP are using, but for BDCOM's GPON olt or EPON OLT, no matter 4 or 8 or 16 PON ports, will have at least 2-4 10G Uplink ports.
