"tony sayer" wrote in message
...
In article , Rod Speed
scribeth thus


"tony sayer" wrote in message
...
In article , Rod Speed
scribeth thus


"Mark" wrote in message
m...
On Fri, 29 Jun 2012 10:17:16 +1000, "Rod Speed"
wrote:

"tony sayer" wrote in message
...
-snip-
Course it must a country of that size I'm sure they don't bother to
cover all of it do they?.

No they don't, but because of the digital cliff seen
with GSM you either have coverage or you don't.

Wrong.

Nope.

The data is still tranmitted using RF.

You quite sure you aint one of those rocket scientist fellas ?

The fact that the underlying data is encoded digitally is irrelevant.

Wrong, as always.

The GSM digital cliff happens because with the GSM system, even
when the base can hear the handset fine, if its too far away as
determined by the round trip delay, it ignores it completely.

Thats not quite a same thing as was implied

Yes it is. And it wasnt implied, it was stated explicitly.

No these are two differing things. One is where it won't work at all and
one where there is insufficient signal and too high a BER (bit error
rate).

Contrary to what people might believe there isn't a
clean transition between perfectly OK to not OK at all.

There is with the ALL OF THE COUNTRY which was clearly what
was being discussed in the original comment still right at the top.

I don't know if you've experienced it but on a Broadcast DAB
system a phenomena known as "bubbling mud" happens when
reception is in this transition phase.

The GSM digital cliff is something else entirely.

Mobile phones have been doing just that
since the GSM system was implemented...

Separate issue entirely to the digital cliff being discussed.

there are areas within the otherwise usable service area
of a base station that are difficult owing to topography..

Thats a different matter entirely.

Do you have any hilly areas like say the Welsh valley's?..

Corse we do.

It's course BTW...

Nope.

Then you'll have pockets of poor reception or rather communication..

Nothing to do with what you originally were talking about.