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Message-Id: <1248254134.28545.111.camel@violet>
Date:	Wed, 22 Jul 2009 11:15:34 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Oliver Neukum <oliver@...kum.org>,
	RĂ©mi Denis-Courmont 
	<remi.denis-courmont@...ia.com>,
	ext Dan Williams <dcbw@...hat.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] USB host CDC Phonet network interface driver

Hi Alan,

> > The AT stuff is really problematic. Look at the hoops ISDN and software
> > modem drivers go through to emulate AT commands. I know even of a CDC-ACM
> > modem which can't deal with AT commands inline (that's within spec).
> > It seems to me we should have a modem API in kernel.
> 
> For devices which don't deal in AT commands probably but for devices
> whose firmware provides an AT command interface over serial I would
> disagree.

I fully agree here. Even if you think you get AT commands under control,
you really won't in the end. That standard is so wildly mis-interpreted
that it is not even funny anymore.

Regards

Marcel


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