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000001_isdn-distribution-owner_Wed Jan 6 07:48:47 1993.msg
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Received: from nac.no ([129.240.2.40]) by relay.cs.toronto.edu with SMTP id <150197>; Wed, 6 Jan 1993 07:48:40 -0500
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Wed, 6 Jan 1993 12:55:37 +0100
X400-Received: by mta elc1.atik.no in /PRMD=uninett/ADMD= /C=no/; Relayed;
Fri, 27 Nov 1992 22:35:54 +0100
Date: Fri, 27 Nov 1992 16:35:54 -0500
X400-Originator: isdn-request@teknologi.agderforskning.no
X400-Recipients: non-disclosure:;
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DL-Expansion-History: isdn@teknologi.agderforskning.no ; Fri, 27 Nov 1992
22:35:54 +0100;
From: " (Clemens Schrimpe)" <csch@netcs.com>
Message-ID: <9211272135.AA14673@bunt.netcs.com>
To: mah@ic.co.at
Cc: isdn@teknologi.agderforskning.no
In-Reply-To: <9211262231.AA00248@parrot.prv.univie.ac.at>
Subject: Re: Telemetry on D-ch, use of unack. info service
X-Mailer: ELM [version 2.2 PL10]
<> btw: we learned that since the X.121 adresses are derived from the
Your number is actually an X.122 address. X.122 defines the mapping between
X.25 DTE addresses and ISDN subsciber numbers. In fact it defines the X.121
escape-code '0' followed by an E.164 address as the DTE address for an
"X.25-over-ISDN" subscriber according to X.31, while using escape-code '9'
for "X.25-over-PSTN" (X.32). Networks are free to include X.31/X.32
subscribers in the numbering-plan of their X.121 DNIC or using the above
named X.122 escape-codes. Austria IS using X.122, thus all Austrian DTE
addresses using X.31 start w/ "043" (without the country specific
escape-code to leave the local network [0 in most cases, 1 in some and
omitted in some other countries]). Since ISDN is currently only deployed in
the Vienna area in fact all addresses start w/ 0431, but that's another story
:-)
<> phone numbers of the ISDN plug and thus define a new adressspace, few
<> PTT's abroad actually can map a call to these numbers to actually come into
<> Austria, althouh we can call abroad without much problem. Sure, a simple
<> matter of configuration..
Yep and Nope...
When I called the German PTT to ask them to establish proper routing they
tried for some time and called me back, telling me, that their current
equipment (Siemens/Northern Telecom) is UNABLE (?!?!?) to route both the '0'
and the '9' escape-codes properly. Since a lot more countries use the X.122
addressing scheme for X.32 access (X.25 over PSTN) they decided to route the
'9' instead of the '0' and thus left me unable to call Austrian X.31 sites
(*sigh*)....
<> No routing protocols spoken in PTTland, it seems.
No, absolutely NOT.
When I called the German PTT they said, they won't talk to me at all and that
I shall have the Austrian PTT have send them a LETTER (no Email or such :-)
to establish routing procedures ...
I *HATE* monopolystic (???) PTTs !!!!
Clemens Schrimpe, netCS Berlin/Germany
PS: After WEEKS they finally managed to at least allow calls FROM Austria ...
--
INTERNET: csch@netcs.com BITNET: csch@TUB.BITNET
PSI: PSI%26245050230409::CSCH X.25/WIN: 2624 50502 30409
PHONE: +49-30-856 999-0 FAX: +49-30-855 52 18
X.400: /S=Schrimpe/P=netCS/A=DBP/C=DE/ [on Research Networks]