[GreenKeys] Parity for five bit Baudot code

Ralph Irish w8roi at wowway.com
Tue Oct 22 14:03:30 EDT 2019


Jim 

Sort of a pre-X.25 or AX.25 transmission system? (Packet?) 

Ralph 

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From: "Jim Haynes" <jhhaynes at earthlink.net> 
To: "Duncanancy" <Duncanancy at earthlink.net> 
Cc: greenkeys at mailman.qth.net 
Sent: Tuesday, October 22, 2019 1:48:20 PM 
Subject: Re: [GreenKeys] Parity for five bit Baudot code 

I'm not familiar with that item, but Teletype once made a longitudinal 
check system for FAA. Meaning not a parity bit per character but a 
couple of check characters at the end of a line. 

See U.S. patent 3,008,005 

--- 

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"No it ain't! No it ain't! But ya gotta know the territory." 
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