Date: Sun, 21 May 2006 15:32:45 -0400 From: Mike Tancsa <mike@sentex.net> To: Brian Candler <B.Candler@pobox.com> Cc: freebsd-net@freebsd.org, Ian Smith <smithi@nimnet.asn.au> Subject: Re: improving transport over lossy links ? Message-ID: <6.2.3.4.0.20060521152652.06cfce10@64.7.153.2> In-Reply-To: <20060521171521.GA29990@uk.tiscali.com> References: <6.2.3.4.0.20060519110026.05820230@64.7.153.2> <Pine.BSF.3.96.1060520014045.15967A-100000@gaia.nimnet.asn.au> <6.2.3.4.0.20060519121104.1126b480@64.7.153.2> <20060521092602.GB20262@uk.tiscali.com> <6.2.3.4.0.20060521104147.081af2d8@64.7.153.2> <20060521171521.GA29990@uk.tiscali.com>
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At 01:15 PM 21/05/2006, Brian Candler wrote:
>On Sun, May 21, 2006 at 11:09:23AM -0400, Mike Tancsa wrote:
> > The internal USR seems to correctly see the carrier drop and PPP
> > hence sees it. However, the 2 external Intels I am experimenting
> > with on the USB serial ports do not.
>
>USB-serial adaptors tend to be very broken, unfortunately. I don't know
>about under Windows, but under FreeBSD/Linux where drivers seem to be
>reverse-engineered, several I've tried don't seem to handshake properly. I
>tried two back-to-back to run a local pppd link and it failed (haven't had
>time to debug that one)
>
>IMO there's no substitute for a real COM port.
I was hoping to use some of the Soekris 4801s which have limited
expandability. I need 2 serial ports for the application and then
the modem of course. Under FreeBSD I have used the uftdi based
adaptors for OOB console access and they seem to work OK.
>A pair of analogue modems will never negotiate v90,
This is the modem connected to my terminal server which is connected
via PRI. I dont have any analog modem to analog modem setups.
---Mike
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