>>>> You mention the problem is being unable to change the media, I
>>>> was unaware this was even possible with the current 3c509
>>>> driver, and most people do it on 3c509's and other PNP cards of
>>>> this sort (such as NE2000 clones) by using a DOS boot diskette
>>>> and the DOS utilities provided by the manufacturer.
>>> That's what I did. I've set it to "auto mode" and it works with
>>> RJ45 cable. But I can't verify if "full duplex" worked right.
>> What transfer speed do you get doing an FTP transfer across the
>> link?
> Don't know. I have to plug a laptop or something on it to test.
> Perhaps Dad's PC (but the latter is still connected via switched
> 100 Mbits ;-)
Nodz...
>> 10base is theoretically capable of one meg per second,
> 1.25 MByte/sec (max)
Given perfectly accurate clocks at both ends, yes, but when is that
achieved?
>> and experience indicates that a 10baseT link normally shows just
>> under 500k per second flat out, presumably due to the half
>> duplex nature of the 10baseT protocol. I'd expect 10base2 half
>> duplex to be similar, and 10base2 full duplex to be somewhat
>> faster.
> I thought it should read 10baseT (with RJ45 cable) can reach
> 1.25 MByte/sec full duplex (switched)?
The choice of base2 or baseT decides the cable used - see below.
>>> So I changed it under Win to "10baseT" for which the 3Com
>>> utilities say "full duplex" enabled.
>> One slight problem - 10baseT uses CoAxial cable, not RJ45 - and,
>> as far as I'm aware, 10baseT is strictly half duplex whereas
>> 10base2 (which uses RJ45 twisted pair cable) is capable of
>> either half or full duplex.
> See above.
See my reply to Mark Hahn a few minutes ago for a fuller discussion.
Best wishes from Riley.
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