BlankReg   11280 pts.  |   Aug 28 2009  7:05AM GMT

The service provider managed to send the T1 all the way from their place to you, so unless you are in the same street, that is probably over 300 metres. Also unless you are a long way away from them, there is probably some slack left in the system, so you exetending it a bit further is not likely to be a real problem.

If you are worried, get them to move the end of the circuit to the new position, then they take the responsibility, and also they have all the test equipment to check if it is still within specification.

The distance is only a rough measure of the likely reach for this circuit. The factors such as the quality and age of the cable, the crosstalk from other services and the distance, all add up to a point where the service running on the cable either works, or not. That is why a good service provider will test the cable once it is installed, and then adjust the signal levels from the other end to make sure it is reliable.