I think he wants Intarwebs in his bedroom using the phone line as a network wire.

I'm not trying to achieve anything, I'm querying if that would be possible use that line as a second point to Ethernet ports, maybe even a wireless extender.

In reply to a post by Timalay:

I'm not trying to achieve anything,

I think you are, otherwise there wouldn't be much point in posting.

In reply to a post by Timalay:

I'm querying if that would be possible use that line as a second point to Ethernet ports, maybe even a wireless extender.

The telephone point upstairs is irrelevant, assuming it is an extension. Methods of extending your network upstairs have already been posted, is there anything you don't understand?

In reply to a post by BatBoy:

I think he wants Intarwebs in his bedroom using the phone line as a network wire.

Ah, that makes sense. I guess the safest/simplest answer is no. Certainly not without disconnecting the extension and converting it into a dedicated network cable. The resulting cable would be of poor quality and might not even work.

CATcrap perhaps?

In reply to a post by Timalay:

I'm not trying to achieve anything

You are asking how to achieve something, whether or not you go ahead with it. You hadn't said what the "something" was.

I'm querying if that would be possible use that line as a second point to Ethernet ports, maybe even a wireless extender.

Not realistically. Use HomePlugs through the mains.

Thank you, that is one of more helpful answers.