When we were digging up our back yard I ran a 20-30m network cable out to the sleepout through some ducting - smart eh?

Except... because I didn't really know what I was doing I used crossover cable. NOT so smart...

It came from DSE and I think it was Cat 6/5e

There is a phone point out there too which I use as the connection to the router.

Trouble is the connection won't stay up for more than ~30mins at a time. (I've been through the whole rigmarole of excluding all the other devices, calling VF, getting the line checked, having my profile changed, getting the router changed etc).

I'm wondering if the phone point is suspect (Chorus engineer checked it but you never know...) so I want to try moving the router into the house to the "main" outlet and using my ethernet cable.

What I need (I think) is a clever adapter to convert the cable to "straight" and a short extension (~2m) to reach the computer.

I don't want to use wireless out to the sleepout as it's a bit too far to get a good connection (with the b/g gear I've got)

I had a look arond the net and there are some adaptors around but
a) Do they work?
b) will I have to put it at the router end or the sleepout end?
c) I found a RJ45 joiner at DSE: Is that what I have to use to connect an extension cable?
d) It maybe better to get the whole house's phone system rewired as I think there's been some DIY in the past. Chorus won't do it. Can anyone recommend a local (North Shore/AKL) outfit that can help?