[ax25-layer2] ECC vs. FCS

[Glenn Thomas]

Here's the elephant's poop - it's not just APRS. It's ISO layer two 
processing for all packet applications (ISO layer three and up)

73 de Glenn wb6w

At 09:23 AM 8/4/2006, you wrote:
>Let me ask the elephant in the room question: Why does APRS need 
>error correction? For its intended purpose I do not see why it does. 
>Sending position reports does not need a reliable message since in a 
>short period you are going to send another.
>
>What am I missing?
>
>Rud K5RUD
>ARES AEC
>Montgomery County, TX
>
>
>----- Original Message ----- From: "Robert Bruninga" <bruninga at usna.edu>
>To: <wes at kd4rdb.com>; <ax25-layer2 at lists.tapr.org>
>Sent: Friday, August 04, 2006 7:58 AM
>Subject: Re: [ax25-layer2] ECC vs. FCS
>
>
>Sounds like a great idea to me.  For a 66% added length, you get
>double the probabilty of detection, -plus- any additional advantage
>gained by trying to do error correction...  Hummh...  and fully
>backwards compatible with all existing APRS.  Again, this only applies
>to very low dutycycle UI applicaitons like APRS...  Bob
>
>
>
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