I first discovered 'Telstra Rope' on our Big Lap when a guy we'd met in a caravan park in WA handed me a coil of it and said "do you want some 'Telstra Rope' - I've got heaps of it?"
He explained to me that it was called Telstra Rope because it was used extensively by Telstra when running cables and it is made to their specifications. They'd use it to pull fibre optic and other cables through the underground pipes.
Regardless of how it came to be named Telstra Rope, that 30 or 40 metres he gave me was well used on the rest of our trip.
Being polypropylene, the rope will float and does not absorb water so it's still easily manageable even in bad weather.
It's also anti rot, anti mildew and tangle free.
I've since bought another 100m x 6mm coil from eBay which was only about $30 and have used it for trailer tie downs, guy ropes, dog rope and many other things.
You can find plenty of suppliers on eBay, just search for 'Telstra Rope'.