netdev - Re: signal quality and cable diagnostic

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Message-ID: <20200512085434.m22zj3i6ehyl34yy@pengutronix.de>
Date:   Tue, 12 May 2020 10:54:34 +0200
From:   Robert Schwebel <r.schwebel@...gutronix.de>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Michal Kubecek <mkubecek@...e.cz>,
        David Jander <david@...tonic.nl>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Russell King <linux@...linux.org.uk>, mkl@...gutronix.de,
        Marek Vasut <marex@...x.de>,
        Christian Herber <christian.herber@....com>
Subject: Re: signal quality and cable diagnostic

On Tue, May 12, 2020 at 10:22:01AM +0200, Oleksij Rempel wrote:
> > Pair A: OK
> > Pair A: Signal Quality Index class D
> 
> At least for automotive, avionics, (rockets till it is deployed :D)
> etc... the cable integrity will probably not change, except we have some
> sudden water infiltration into the cable, etc :)

As some of our applications are running on agricultural equipment, water
in the cable is not completely implausible :-)

rsc
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