Extending ADSL internally
I've just had a new line installed especially for broadband, its not in the same building as our servers as the telegraph pole nearest to our main building is 2km+ away from the exchange whereas the building the new line is installed in is connected to a different exchange only 900m away, I'm trying to decide which route to take when connecting it up to our servers.
I've come up with 2 ideas so far -
1. Connect the router directly to the nearest switch and v-lan the port off from everything else then configure the switches between there and the servers with v-lans so that only our ISA server is connected to the router
2. Use one of the many spare pairs on our internal phone cabling to extend the line to the main building. this would add around 150m to the cable length over potentially bad wiring(our ex phone company sold the school extra cabling and claimed it could be used to extend the lan however as the total distance is 150m+ and there are multiple joins in the cable it'd never have worked)
How sensitive is ADSL to bad cabling/extensions? I'm looking at having ADSL2+ installed with upto 20mbit down and 2.5mbit up, option 2 would be the most secure and would reduce the effect of any network outages on our net connection.