Does a Fibre modem have a REN?

[#1]

We currently have 2 phones in the house and I was wondering about adding some extensions upstairs, when I remembered about RENs.  I seem to remember BT supporting no more than 4 REN on a domestic line, and an ADSL modem was REN1.  But what about a fibre modem?  I suppose if I was at home I could lift it up and look underneath, but I'm at work so I thought I'd ask. 
I've done some googling but it's all very vague, with people saying "shouldn't make a difference" and other saying they don't know.  Plus with fibre being so new in the UK there's not that much info directly about fibre modems.
Anyone on here know for certain?

[#2]

I'm not aware that ADSL modems have a REN (Ring Equivalent Number) as a normal ADSL modem do not monitor for a ring. Looked at 2 versions of BT supplied ADSL modems and both have no REN quoted in the spec.

[#3]

No REN's on Fibre Modems or Modem/Routers!

[#4]

Just to confirm what Anotherone states -
Broadband, FTTC or otherwise, works at RF superimposed on the phone line, and therefore has no effect on the 'loading', or REN, of the line.

[#5]

Thanks all.  I can now buy that lurid green Trimphone I've got my eye on!