In article ,
 Boeland  wrote:
 Steve Lusardi wrote:
  We already have it. It's called Ethernet. Even if you have NMEA 
  instruments, 
  you can use intelligent gateways that already exist. What problem?
  Steve
  
  "Poit"  wrote in message 
    00.119...
  I would like to see the community come up with an open standard that would
  kill off NMEA.  It could stay purely ascii, be bi-directional, easy to 
  use,
  no binary mumbo-jumbo.  It could be extensible like XML.  Best of all it
  would be free for everyone including manufacturers.
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 The problem is that applying these communication standards require 
 knowledge that most people don't have, so they stick to what is offered 
 and can interconnect without being a pro in data exchanges.  If 
 protocols like Ethernet or TCP/IP are applicable to marine equipment it 
 would be wonderful to publish some installation procedures for people 
 who are ignorant of them.
 Could this be done?
 It sounds that NEMA instruments could communicate using the Ethernet 
 protocol.  How do you do this?
Ethernet is NOT a Protocol...... it is a Hardware Connection Standard.
TCP/IP IS a protocol..... that can run on Ethernet, or a lot of other
Hardware Connection Standards......
Nema018x is a Protocol, as well as specifing a Hardware Connection 
Standard, that few OEM's actually pay attention to......
Nema2K is also a Protocol, with a specific Hardware Connection Standard,
that OEM's have to pay attention to......
One would NEED, to first have a Hardware Bridge that bridges the two
different Hardware Connection Standards. Then a Protocol Converter
that can translate between the two Protocols in question, 
BiDirectionally....
-- 
Bruce in alaska
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