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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!ames!agate!ucbvax!sfu.ca!mclagan
- From: mclagan@sfu.ca
- Newsgroups: comp.protocols.appletalk
- Subject: maximum lenght of LocalTalk cable
- Message-ID: <9212121821.AA09636@fraser.sfu.ca>
- Date: 12 Dec 92 18:21:19 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 29
-
- In article <boulton.723958920@hawk> boulton@hawk.adied.oz.au writes:
-
- >
- >We are setting up a printer which is some distance (15 to 30 metres)
- >from a Mac Quadra 950.
- >
- >The problem we have is that we do not know the maximum length of the
- >that we can run a single segment of LocalTalk cable for.
-
- I've got about 1000m of multiple-twisted pair PhoneNet cabling with
- some segments over 250m. Farrallon says you can go up to appprox.
- 1000m depending on quality of copper wire (24 guage or better),
- and topology ("bus" or "backbone" design is best, passive stars
- are a no-no). The only problem I've had is with one long segment
- of 3-twisted pairs where each pair was inducing interference on
- the others. Apparently this can occur when running the same
- bandwidth on all pairs. Solution: run more cable, use some
- pairs for voice or ethernet.
-
- >Also would extra shielding or anything along those lines improve the
- >distance we could run the cable?
- >
-
- As far as I know, both LocalTalk and PhoneNet standards call explicitly
- for *UN*shieled cable.
-
- Scott.
- mclagan@fraser.sfu.ca
-
-