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- Newsgroups: comp.sys.unisys
- Path: sparky!uunet!well!well.sf.ca.us!wwkiii
- From: wwkiii@well.sf.ca.us (Walt Kemmerer)
- Subject: Re: seeking info on UDLC, P1024 and Uniscope
- Message-ID: <wwkiii.726780747@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- References: <1993Jan11.172008.7292@nastar.uucp>
- Date: Mon, 11 Jan 1993 19:32:27 GMT
- Lines: 49
-
-
- Bill,
-
- The UDLC and Uniscope protocols are indeed Unisys-specific, both
- hailing back to the old Sperry Univac side of the house. As for
- P1024, these are actually a series of airlines protocols (P1024A,
- P1024B, and P1024C) that are implemented in the Unisys (Sperry)
- Distributed Communications Processor (DCP) family under the heading
- of AIR/net (with some other airlines specific stuff also being
- thrown in, like AX.25 and Inverted and Real ALC). The P1024C
- data presentation bears a strong resemblance to Uniscpe data stream
- but the protocol wrapper is quite different.
-
- There is some documentation on the Uniscope and UDLC protocols in
- the DCP "dump buster's guide", which is on the release tape for
- the DCP software release, called TELCON. While this document is
- no longer being actively supported (it appears), the UDLC and
- Uniscope stuff hasn't changed for some time. There were also
- actual documents on these protocols: look around for an old Sperry
- document called the UDLC General Description (UP number not in
- front of me), and any of the Uniscope family (U400, UTS4000, UTS20,
- UTS40, UTS60) Programmer's Reference Manuals (I believe). These
- all pretty much were the same vis a vis the protocol wrapper that
- Uniscope implements but the data presentation layer capabilities
- varied in the different mambers of the family. I believe I have
- copies of several of these (including the UDLC document), but I'll
- have to unarchive them to give you the old UP numbers, and then
- you're on your own in getting Unisys to decipher what they are
- called these days (if they are even in print).
-
- Best place for P1024 documentation is probably SITA, which has a
- USA presence in GA, so you're in luck there. Beware, however, that
- many airlines use P1024 as a starting point and then implement
- bilateral agreements to modify the protocol for their own specific
- link. This is a relatively common practice, so beware when an IBM
- or Tandem P1024 variant is in play; check for bilaterals.
-
- If I can be of further assistance, post a follow-up here in
- comp.sys.unisys and I'll see what I can do to help you out. The
- whole arena of Unisys (Sperry) comms is pretty much under-documented
- but it's not all that hard to decipher :-)
-
- Cheers, Walt
-
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