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From: Ralf Baechle DL5RB <ralf@linux-mips.org>
To: "Mike McCarthy, W1NR" <lists@w1nr.net>
Cc: Bernard Pidoux <bernard.pidoux@upmc.fr>,
	linux-hams <linux-hams@vger.kernel.org>,
	Ray Wells <vk2tv@exemail.com.au>,
	Charlie k4gbb <k4gbb1@earthlink.net>,
	Jerry DeLong <KD4YAL@tampabay.rr.com>, F1TE <f1te@f1te.org>,
	f8arr <f8arr@f8arr.org>
Subject: Re: BUGs into libax25
Date: Mon, 2 Jun 2008 10:16:02 +0100	[thread overview]
Message-ID: <20080602091601.GC997@linux-mips.org> (raw)
In-Reply-To: <4843579E.8030003@w1nr.net>

On Sun, Jun 01, 2008 at 10:14:54PM -0400, Mike McCarthy, W1NR wrote:

> As I recall, there is a limit to the size of a callsign in the AX.25 
> protocol specification.  Will changing it create an incompatibility with 
> standard TNC protocol stacks?

Afaik the currently only user of 6-letter callsigns aside of special
event stations are Australien foundation license which look like VK3FABC
so 4-letter suffix and those are not permitted to use packet radio anyway.
I was wondering if Swaziland which only has a half-series assignment is
possibly using 3+3 calls.

Anyway, the maximum callsign length in the AX.25 spec is 6 characters and
(I looked into that ...) there is no way of extending that without causing
large scale software breakage :-(  It's almost like retrofitting 128-bit
addresses into IPv4 - it took a new protocol.

  Ralf

  parent reply	other threads:[~2008-06-02  9:16 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-01 22:26 BUGs into libax25 Bernard Pidoux
2008-06-02  2:14 ` Mike McCarthy, W1NR
2008-06-02  6:49   ` Robin Gilks
2008-06-02  9:16   ` Ralf Baechle DL5RB [this message]
2008-06-02 17:16     ` Dave Platt
2008-06-02  8:49 ` Ralf Baechle DL5RB
  -- strict thread matches above, loose matches on Subject: below --
2008-06-02  9:36 DL5DI
2008-06-02 10:41 ` Matti Aarnio
2008-06-02 16:28   ` Bernard Pidoux

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