[Gllug] Wireless access point/ADSL Modem/Router

[Chris Bell]

On Tue 27 Apr, John Hearns wrote:
> 

> 
> 
> Actually, ATM NSAP addressing has a lot to do with telephone signalling,
> so to dismiss 'dialling' out of hand is misleading.
>  
> 
   I do not know whether it has changed since, but on the digital techniques
course I attended many years ago I was told that, in the BT ATM system,
routeing information went ahead of the data, virtually as a separate data
stream, and set up the route switching so that there was minimum delay for
the data. This would appear to rely on the routeing data travelling faster
than the main data unless there is an initial delay before the main data is
sent, perhaps with routeing data packets which are much smaller than the
main data packets, in a stream of packets sent at predictable intervals,
although it is supposed to work well (for example) when there is
intermittent interference on a microwave link and the data stream is
repeatedly switched between the nominated main and standby routes.

-- 
Chris Bell

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