Hi, I've just set up new offices where BT have installed 3 lines for us, and are about to install another line for one of the offices rented by another business. I am the landlord.
When they installed the first 3 lines 1 month ago, they used a connenction box like this which they placed in our suspended ceiling:
off which the master sockets for our 3 lines go. One of these lines has ADSL2+ on it, with measured speed of about 18Mb download.
Here's what it looks like inside (or was I not allowed to open it - oops):
The black wire comes from the outside, I think from a connection box a few shops down. (We are offices above a shop).
Our new tenant asked to share our ADSL connection but we refused because he intends to use VoIP which will affect our bandwidth and download limit, which we sorely need.
So, this tenant has arranged for a new BT line for his own ADSL connection.
Now, no doubt this will be run of this connection box within our suspended ceiling, rather than the engineers running a new cable from the street cabinet or the nearest external box.
So my question is, will this affect our existing ADSL connection on the first line which runs from the same box?
In other words, have we gained nothing by having him create a new ADSL line, rather than sharing our own.
Or is it that Bt will have take into account the contention ratio and anyway we would have 20 lines sharing our DSLAM or whatever in the exchange and so an extra line, even if run of the same connection box, makes no difference?