[aprssig] Something odd with the internet servers?

[AE5PL Lists]

Yes, I am sure.  From the 2.0 specification: "The I field can be up to
256 octets long, and shall contain an integral number of octets."  The
2.2 specification added a NI field for negotiating I-Field length, but
that is only valid for connected packets (which APRS is not).

Reference http://www.tapr.org/tapr/html/Fax25.html

73,

Pete Loveall AE5PL
mailto:pete at ae5pl.net 

> -----Original Message-----
> From: Curt Mills
> Posted At: Thursday, January 13, 2005 10:06 PM
> Subject: RE: [aprssig] Something odd with the internet servers?
> 
> On Thu, 13 Jan 2005, AE5PL Lists wrote:
> 
> > Ah, that explains it.  The information field (with 
> timestamp) of the 
> > return message would be over 256 characters which is not allowed by 
> > AX.25.  Good eyes, Gerhard ;-)
> 
> Sure about that?  I probably need to go look at the spec 
> again, but I could swear we used to run 1024 byte packets on 
> TCP/IP.  I don't think 256 is an inherent limit of AX.25 protocol.
> 
> A quick look at the AX.25 HOWTO document shows that even 
> Linux allows 1 to 512 as the length.