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- Newsgroups: bc.general
- Path: sparky!uunet!van-bc!cs.ubc.ca!newsserver.sfu.ca!news
- From: richard@sfu.ca (Richard Chycoski)
- Subject: Re: Surplus EThernet Devices for Sale
- Message-ID: <1992Dec26.191129.17037@sfu.ca>
- Sender: news@sfu.ca
- Reply-To: richard@sfu.ca
- Organization: Simon Fraser University, Burnaby, B.C., Canada
- References: <1g8n6tINNnmo@iskut.ucs.ubc.ca>
- Distribution: bc
- Date: Sat, 26 Dec 1992 19:11:29 GMT
- Lines: 37
-
- In article <1g8n6tINNnmo@iskut.ucs.ubc.ca> morrison@unixg.ubc.ca (Rick Morrison
- - System Mgr) writes:
- > We have the following surplus equipment:
- >
- > 2 - 10BaseT to 10Base2 ethernet repeaters (used
- > to go from a twisted pair network to a thin-wire coax
- > network). --- Cabletron CTPT100T
- >
-
- A Cabletron CTP100T is *not* a repeater, it is a media converter. As such,
- it has difficulties with some devices connected to its Thinwire port, and the
- Thinwire segment is limited in length and number of stations (10 max).
-
- (The difficulties are a result of the lack of a repeater, since timing cannot
- be reliably maintained across the link, and machines like the NeXT or Auspex
- file server, both of which serve back-to-back packets to the channel with
- minimal, but within specification, spacing, end up with a lot of Ethernet
- errors.)
-
- The CTP100T is useful in a small lab that uses only low performance Ethernet
- devices, but don't try to use it with workstations that expect the net to
- behave at full IEE 802.3 specifications.
-
- SFU is generally a very satisfied Cabletron customer, and most of their devices
- do the job that they were designed to do very well. The CTP100T has been the
- one flaw in the ointment, and since other suppliers can provide equivalent
- convertors *with built-in repeaters* for less money, I'd recommend that you
- look around before buying a CTP100T.
-
- (I'm sorry if this makes your sale more difficult, but this is a product that
- has caused me a lot of hassle, which I would like to save any potential
- buyers!)
-
- - Richard Chycoski
- Senior Systems Consultant
- Simon Fraser University
- richard@sfu.ca
-