>I've ordered it from Altronics Australia...
I meant where you do look up the ## for a particular device. For example, what ## is the phone line that connects to the wall (RJ10, RJ11, RJ12, ...)? What is the ## for the phone handset (RJ10, RJ11, etc.)? What is the ## for the Atari Mega ST keyboard (RJ10, RJ11, RJ12, ...)? What is the ## for the PC ethernet connector (RJ10, RJ11...)?
Here in USA, those handset-based phones are pretty much being thrown out so that phones cost less than the wire. I saw a price for the cable in Office Depot for 9.99 and the phone with the cable was $5 with $5 rebate.