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- Newsgroups: comp.dcom.isdn
- Path: sparky!uunet!digibd!dror
- From: dror@digibd.com (Dror Kessler)
- Subject: Re: Network Connections over ISDN
- Organization: DigiBoard Incorporated, Eden Prairie, MN
- Date: Fri, 14 Aug 1992 14:46:56 GMT
- Message-ID: <1992Aug14.144656.1934@digibd.com>
- References: <1992Aug11.123306.145@indyvax.iupui.edu> <1992Aug12.085917.5543@ericsson.se>
- Lines: 34
-
- In article <1992Aug12.085917.5543@ericsson.se> etxorst@eos.ericsson.se writes:
- >
- >In a real-life situation a message of 1024 bytes (the size limit we'd
- >arbitrarily picked for our message transfer function) took several
- >seconds (often 5 - 10). At 16 kbit/s it should only have needed 0.5 s.
- >I think part of the delay may have been due to flow control imposed by
- >the CO.
- >
-
- Are you reffering to D channel packet (X.25) or Q.931 user-to-user signalling?
-
- Using D channel X.25, I have seen close to 14000 bps of user data.
-
- Q.931 user-to-user signalling is not intended to move large amounts of
- information. The main use would be signalling setup information user-to-user
- upon connection establishment. Trying to move data with this facility is
- asking for it.
-
- After saying that, I would like to point that data transfer on the D channel is
- becoming less and less interesting. have you ever thought of how much you're
- going to pay for this service LONG DISTANCE. With circuit switched B channel,
- you're paying a rate comparable to analog long distance. Also user-to-user
- signalling can not be guaranteed unless there is end-to-end ISDN (SS7 in US)
- deployment, which is always to be completed in two years.
-
- ----------------------------------------------------------------------------
- Dror Kessler phone: (612)943-5374
- Senior Member of Technical Staff fax: (612)943-0803
- DigiBoard
- 6400 Flying Cloud Drive
- Eden Prairie, MN 55344 e-mail: dror@digibd.com
- ----------------------------------------------------------------------------
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