Of course modern fibre broadband is a hair width of fibre glass encased in a pen diameter sheath of protection and kevlar.
This is the process how it it precision fused together as the Telefónica subcontractor (previously a waiter) installs my long overdue fibre broadband.
That Japanese machine is some €3k of kit that melts the ends together and measures the signal loss. Includes a diamond cutter to obtain flat cuts of imperceptibly thin fibre glass.
More than 300mb comes down that line which is then software throttled to about 35mb asymmetrical.
The installers get this competitive joy when the fusion readings of the machine show zero loss. Here he repeated it because he forgot to apply the sheath which is then melded over the join again.
Until now I had, at most, upload speeds at home of 800kb and download of max 2mb which meant freezing of any stream TV viewing and inability to handle large files for work.
So this is going to free up years of my hourglass life!
Only downside was a 2 month wait for a delayed installation and a blocked Street and neighbour wall pipe which meant having to aerially sling a line from top of house across garden to telegraph pole. And even now I'm still not set as it needs a second in home installation from my telco.