In reply to:
Maybe you thought that 1 card supports 1 line
Yes I did think that and so I am wrong with this way of thinking then?
In reply to:
but I think they support upto 48 lines per card, maybe more with the lastest stuff.
Now I know where the 10" comes into it.
As each line card supports dozens of individual lines then I assume that an
individuals line card itself is substantially smaller and they can be changed relatively easy like, for example, when people get connected to a broadband service for the first time or when people currently on ADSL change over to a cable broadband service assuming that, of course, they live in a cable area?