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- Path: sparky!uunet!utcsri!torn!cunews!revcan!software.mitel.com!grayt
- From: grayt@Software.Mitel.COM (Tom Gray)
- Newsgroups: comp.dcom.cell-relay
- Subject: Re: Curious attitude ...
- Message-ID: <12459@janice>
- Date: 30 Jul 92 18:36:45 GMT
- References: <12430@janice> <22074@venera.isi.edu>
- Organization: Mitel. Kanata (Ontario). Canada.
- Lines: 48
-
- In article <22074@venera.isi.edu> finn@dalek.isi.edu (Greg Finn) writes:
- >
- >In article <12430@janice> grayt@Software.Mitel.COM (Tom Gray) writes:
- >
- >>ATM as I stated later in the same posting is not a technology
- >>for carrying isochronous data. It is a very poor technology for
- >>carrying isochronous data.
- >
- > You and the AT&T people I meet at conferences are at odds.
-
- I am not at odds with the AT&T people. AT&T and anyone else in the
- business know that there is no sense in using ATM to carry
- isochronous data. They are going to use ATM to multiplex
- isochronous, synchronous and asynchronous data and control
- into channels. Existing digital switches are much more
- capable than ATM in carrying isochronous data and
- would be cheaper at it as well.
-
- You (conveniently) edited out the explanation that I presented that
- showed that no one would use ATM to carry isochronous traffic
- around a building. There is no cost justification in doing so.
- However it can make economic sense to use statistical multiplexing
- based on ATM techniques to reduce the required network bandwidth
- over long haul trunks. ATM is not a technique for carrying
- isochronous data (since there are much better ways of doing
- this) but it can be used to create services which more
- economically carry isochronous data in certain circumstances.
-
- ATM is being designed to create a manageable network that
- can be used to create applications. ATM is being designed
- with contention resolution, resource allocation, performance
- prediction etc etc in mind. ATM is being designed as a network
- in which there will be practical resolutions to these
- problems.
-
- For an introduction to some of these ideas in ATM, you
- could consult Multimedia Traffic Management Principles for
- Guaranteed Network Performance by Woodruff et al in
- the April 1990 issue of JSAC.
-
- > As regards your other assertions, you must know more than I.
- > I have no idea what the future will hold.
-
- What? You are not going to tell me that ATM is just another link
- layer for LAN services that will have major problems with
- bursty traffic!
- --
- i.sinature
-