From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Pavel Machek <pavel@ucw.cz>
Cc: Ed Vance <EdV@macrolink.com>,
"'Linux PPP'" <linuxppp@indiainfo.com>,
linux-serial@vger.kernel.org,
"'linux-kernel'" <linux-kernel@vger.kernel.org>
Subject: Re: RS485 communicatio
Date: 16 Mar 2003 19:57:06 +0000 [thread overview]
Message-ID: <1047844625.21346.1.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <20030315194646.GB367@elf.ucw.cz>
On Sat, 2003-03-15 at 19:46, Pavel Machek wrote:
> > I believe Point-to-Point Protocol only supports point-to-point symmetric
> > links. Don't think there is any multi-point support in the protocol. IIRC,
> > PPP also requires a full duplex link, which is not available on an RS-485
> > link with more than two stations, even if it is a 4-wire link.
>
> Get scarabd (I don't know *where* it is), it can run TCP/IP over slip over
> half-duplex link. Performance is not too good.
Robin O'Leary wrote most of it, so its probably somewhere like
caderus.co.uk
Half duplex performance is fine at a sensible speed and with decent
reliability. On radio will collisions its a lot less pretty
prev parent reply other threads:[~2003-03-16 18:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-13 16:56 Ed Vance
2003-03-13 17:46 ` Richard B. Johnson
2003-03-13 22:54 ` RS485 communication Robert White
2003-03-13 23:30 ` Chris Fowler
2003-03-15 8:07 ` Robert White
2003-03-15 15:42 ` Chris Fowler
2003-03-15 12:46 ` David Woodhouse
2003-03-16 0:56 ` Alan Cox
2003-03-16 10:05 ` David Woodhouse
2003-03-16 10:35 ` Russell King
2003-03-16 10:51 ` David Woodhouse
2003-03-15 19:46 ` RS485 communicatio Pavel Machek
2003-03-16 19:57 ` Alan Cox [this message]
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