Our house used to be divided between two tenants, each with their own landline. Now we're here we've combined the property again and are using one of the landlines for phone and broadband, while the other is still connected up (has a dial tone) though we don't pay line rental on it or anything.
Could we use the additional landline as a dedicated internet-only line (for an increased speed over ADSL2+)? Is this what a leased line is?
Thanks in advance for any answers!
To answer your question; Leased lines can run over either Copper or Fibre.
What determines it (usually) is whether the copper line has the capability of running the leased line service at the quality and speed at which the customer is ordering. For instance you won't be able to get a leased line service on a 10km copper line.
Fibre is usually used more as far as I know because it is much more future proofed and because it is much more reliable (Less joints to the exchange). It is also capable of much higher speeds than that of copper especially over long distances.
Also Fibre doesn't suffer from crosstalk.
Obviously as you are probably aware leased lines are extremely expensive and the setup fees can be enormous if you don't end up using existing infrastructure.
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Downstream Upstream
Connection Speed: 22494 kbps 1211 kbps
Line Attenuation: 16.0 db 9.7 db
Noise Margin: 2.6 db 6.7 db
Telewest (2004-2006): 256Kbps -> 512Kbps
BT (2006 - Present): 8128/448Kbps on 20CN Alcatel DSLAM -> 22494/1211Kbps on 21CN Huawei MSAN