Why are we still stuck with Copper RJ45 Ethernet twisted Cable @ 1Gbps for Local Networking / last Mile? While there are up coming NBase-T which offer up to 2.5/5Gbps Ethernet, they are expensive and no where near as cheap as 1Gbps Port. Not to mention most Vendor will likely put out 2.5 Gbps instead of 5Gbps due to cost reason.
Why is there no common, simple, cheap Fibre Cable and Port to replace our age old RJ45 and Copper Cable.
P.S - I actually rather have NBase-T, but at the moment no one is offering it. At least not at the price bracket most would pay for it.
Reason for existence of 2.5/5G does not have that much to do with the cost of PHYs themselves (it.s more or less the same circuitry as for 10G) but with power consumption.
Even 1000-base-T is surprisingly power hungry due to the fact that the used signaling is essentially analog and not some simple binary/ternary line code, which necessitates inefficient analog final Tx amplifiers and such things.
Probably all current 1G PHYs contain some TDR-ish magic that measures the length of attached cable and determines how much can be the Tx power scaled back in order for the link to still work (~10 years ago this feature was often the main point of manufacturers' advertising, today it is essentially must-have).
10G PHY is even more power hungry and 2.5/5G is way to not only scale Tx power back but to get additional power headroom by reducing the symbol rate.
Why is there no common, simple, cheap Fibre Cable and Port to replace our age old RJ45 and Copper Cable.
P.S - I actually rather have NBase-T, but at the moment no one is offering it. At least not at the price bracket most would pay for it.