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- From: pat@hprnd.rose.hp.com (Pat Thaler)
- Date: Mon, 27 Jul 1992 18:37:50 GMT
- Subject: Re: Is Starlan really Ethernet?
- Message-ID: <6700046@hprnd.rose.hp.com>
- Organization: HP Roseville Networks Division
- Path: sparky!uunet!usc!sdd.hp.com!hplabs!hplextra!hpcc05!hpyhde4!hpycla!hpergfg2!hprdash!hprnd!pat
- Newsgroups: comp.dcom.lans.ethernet
- References: <92205.101555LORAX@wvnvm.wvnet.edu>
- Lines: 38
-
- In comp.dcom.lans.ethernet, LORAX@wvnvm.wvnet.edu (David Neal) writes:
-
- We want to replace our Starlan network with something that actually works
- but we have a lot of money invested in the hardware. From what I understand
- Starlan is just a variation of Ethernet made to run over twisted pair wiring.
- In fact the microchannel NICs in our PS/2s have "Ungerman-Bass" printed on
- them and have a D-shell connector on the back which is then connected to an
- external box that adapts them to an RJ-45 jack. Our ISA boards have the RJ-45
- jack built in. Do these boards conform to the 10Base-T standard? Can we just
- swap the Stargroup software with Netware and keep rolling?
-
- David,
-
- Two things have been sold under the name of StarLAN. First there was
- a 1 Mb/s version of IEEE 802.3 over twisted pair. This was done in the
- mid '80s when we didn't think we could do 10 Mb/s over twisted pair.
- The name in the standard was 1BASE5, but most product was called StarLAN,
- a name that came from AT&T who originally proposed 1BASE5. Obviously,
- such products neither conform to 10BASE-T nor directly interoperate with
- it. They can be connected to a 10BASE-T network through a bridge.
-
- Some companies (mainly HP, AT&T and perhaps UB) called their early (pre-
- 10BASE-T standard) 10 Mb/s twisted pair products StarLAN-10. These products
- are similar to 10BASE-T except they don't perform the Link Test Function
- which was defined after they were on the market. Except for Link Test,
- they where fairly similar to what was defined in the standard. Some
- 10BASE-T products allow the option of disabling Link Test for backwards
- compatibility with the pre-standard products. (This is similar to
- turning off SQE test on a MAU to be backwards compatible with old stations.)
-
- HP only used the name for pre-standard products. Our 10BASE-T products
- are called EtherTwist. I don't know if AT&T or UB kept the name StarLAN-10
- when they rolled to 10BASE-T.
-
- Pat
-
-
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-