Re: Token ring? topic hijack: was Re: Mystery open source switching

[Sven Olaf Kamphuis <sven () cb3rob net>]

if you can live with the rather small mtu :P

On Tue, 2 Nov 2010, Patrick W. Gilmore wrote:

> X.25 is very useful for non TCP applications, especially in places where the infrastructure is less-than-modern.
>
> X.25 used as a layer 2 transport (even though it is not technically a L2 protocol, but then neither is ATM) is useful 
> because it has error checking.
>
> --
> TTFN,
> patrick
>
>
> On Nov 2, 2010, at 4:34 PM, Julio Arruda wrote:
>
> > There used to be quite substantial usage of X.25 in Brazil, for a lot longer than usual, for POS transactions. x.28 in 
> > fact, that would be PAD to X.25, may still be the case ? (RENPAC and 3028 come to mind)
> >
> > The management of some Nortel GSM devices also could be done over X.25, usually, it would be backhauled over XOT (or in this 
> > case, the Nortel equivalent) to the management station, from the devices (I'm happy to say, I don't remember if from 
> > the BSCs, or BTSs).
> > Of course, QLLC and running QLLC to LLC (token ring) devices, was the cherry on top..SNA on top of X.25, converting to 
> > token ring SNA..
> >
> > Somehow, I can't get rid of the nightmares and the waking in the middle of the night, thinking about LAPB, and Clear 
> > codes and etc., LUs and PUs...the horror...the horror..
> >
> >
> >
> >
> > On Nov 2, 2010, at 3:59 PM, Sven Olaf Kamphuis wrote:
> >
> > > doesn't most of SMS (the crap on GSM's) also run on x.25?
> > >
> > > i recall some customer of mine talking X.25 to a telco to get their messages to the phones anyway.
> > >
> > > same for one of our banks not so very long ago...
> > >
> > >
> > > On Tue, 2 Nov 2010, Sven Olaf Kamphuis wrote:
> > >
> > > > > Are there still any commercial X.25 nets in operation?  I had some peripheral involvement with Tymnet in the 
> > > > > MCI/Concert conversion, and hear it shut down sometime in 2003-4.
> > > >
> > > > http://www.ram.nl/nl/aanbieder_van_mobiele_datacommunicatie/diensten/netwerkdiensten?read_more=1323735124421760482
> > > >
> > > > also: yep.
> > > >
> > > > commercial x.25 based packet radio networks, and the wired parts to keep them together, are still around.
> > > >
> > > > (the non-commercial ones also ofcourse ;)
> > > >
> > > > --
> > > > Greetings,
> > > >
> > > > Sven Olaf Kamphuis,
> > > > CB3ROB Ltd. & Co. KG
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> > > >
> > > > On Tue, 2 Nov 2010, Chris Boyd wrote:
> > > >
> > > > > On Nov 1, 2010, at 11:48 AM, Nick Hilliard wrote:
> > > > > > And FDDI and X.25 and every single legacy protocol
> > > > > Are there still any commercial X.25 nets in operation?  I had some peripheral involvement with Tymnet in the 
> > > > > MCI/Concert conversion, and hear it shut down sometime in 2003-4.
> > > > > --Chris