Watch out for these.
http://share.ovi.com/media/Muddymike...e.10775?sort=0
http://share.ovi.com/media/Muddymike...e.10774?sort=0
My phone line came into the house through this when we moved here 6 years
ago, and I wondered why the broadband was a bit slow until I found this box
and had the incoming cable re rerouted so as not to use this and the
associated old cloth covered cable.
I left it in situ in the cupboard under the stairs as a novelty.
Mike