[OZAPRS] Interesting

[Richter, Mike W]

But why did commercial and professional services move form X.25 to Frame
Relay ? - because the reliability of terrestrial transmission improved
with the introduction of Optical Fibre.

This meant that the link-by-link error checking built into X.25 was no
longer an efficient protocol.

Has the error-rate of HF Transmission changed ? - no, so we keep using
AX.25.

What does it matter what protocol we use - our aim is to get reliable
reception of very short data packets - whether they are received 200km or
2000km distant - what precedent is there for that ?

Mike VK2BMM


-----Original Message-----
From: kevcav [mailto:abc123 at emirates.net.ae]
Sent: Monday, 4 October 2004 12:48 PM
To: ozaprs at marconi.ics.mq.edu.au
Subject: Re: [OZAPRS] Interesting
Terry,
Can I respectfully ask who is making intelligent use of the information 
being progogated by the Igates in real time.
I have the view that there is no new phenomena discovered that HF PRS is 
using. The communication protocol being used is not leading edge and has 
long be discarded by most involved in the commercial or professional 
sense. All the techniues being used are well known, expected and 
predictable in the amateur literature.
Maybe the answer to the original question is therefore:
Big boys and their toys.
73's to all
Kevin
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