Hi there. Phones certainly aren't my thing - but I am trying to put two analogue phones into a building which has a patch panel.
There is only one line - a standard telephone line. But I want two phones - one upstairs and one downstairs. They both need to be on the same line. If someone is talking on one phone and someone picks up the 2nd handset, they will be having a 3-way conversation.

I've managed to get one phone working - by patching the phone line to the relevant port at the patch panel and then I've plugged the phone into an NZ Master Socket to an RJ45 plug - all good.

What equipment should I use to connect up the other handset on a different patch plug?
Do I use a plain old double adapter at the patch panel and find some cables which go from NZ Master Socket (male) to RJ45 (male) - do they exist? Is there another way which I am missing completely?

It's been a long week....

Thanks in advance.