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

Patrick W. Gilmore patrick at ianai.net
Tue Nov 2 15:37:33 CDT 2010


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
>>> =========================================================================
>>> Address: Koloniestrasse 34         VAT Tax ID:      DE267268209
>>>      D-13359                   Registration:    HRA 42834 B
>>>      BERLIN                    Phone:           +31/(0)87-8747479
>>>      Germany                   GSM:             +49/(0)152-26410799
>>> RIPE:    CBSK1-RIPE                e-Mail:          sven at cb3rob.net
>>> =========================================================================
>>> <penpen> C3P0, der elektrische Westerwelle
>>> http://www.facebook.com/cb3rob
>>> =========================================================================
>>> 
>>> Confidential: Please be advised that the information contained in this
>>> email message, including all attached documents or files, is privileged
>>> and confidential and is intended only for the use of the individual or
>>> individuals addressed. Any other use, dissemination, distribution or
>>> copying of this communication is strictly prohibited.
>>> 
>>> 
>>> 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
>>> 
>> 
> 
> 





More information about the NANOG mailing list