[Gllug] 64K Channels and all that ...

[Chris Bell]

On Fri 20 Sep, Dave Cridland wrote:
> 
>
> >    A quick look at the reference book says that basic rate ISDN has two 64K
> > B (Bearer) channels plus one 16K D (Data) channel, while Primary rate ISDN
> > has 23 B channels plus one D channel. The D channels carry the control data.
> > It is possible to link any B channels on demand for faster data
> > transmission.
> 
> You in the US or something? ;-)
> 
> An E1 PRI has 30 'B'earer channels and one 'S'ignalling channel - an S
> channel is, as far as I can work out, a 'D'ial channel with a funny
> name.
> 
> A T1 has fewer Bs, and they're 56k in the states, hence the K56 modems.
> They could be K64 in the UK. Except nobody ever gets more than 40k
> anyway, and that only on a good day. :-)
> 
   I did say it was a quick look, it was on the first of the pages about
ISDN, and it was getting late. The book was given to me by a colleague who
bought two copies from a shop in Ealing just before the area was bombed by
the IRA.


-- 
Chris Bell


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