Nico,
I agree with the previous post. It is most likely a auto-negotiate
problem. Does the Hub have a console port on the back? It may look like
a DB-9 serial port or an Ethernet port or it may look like something
else. Regardless of the port it uses, it would be labeled "Console" or
"TTY", maybe "Terminal" or perhaps a couple other things. It should be
obvious, it would be different from the other ports somehow. I recommend
you find the port, find / make the appropriate cable to plug into it (if
you don't know what you need post the port type that it uses and what it
says above it, I can help) and get some terminal software for your PC.
Get the serial port setup in the terminal software with the correct baud
rate, parity, stop bit, etc. This should be on the Hub around that port,
but if not we can figure it out. Now you should be able to press the
connect button in the software and the hub will start sending you
output. Maybe it will ask you to login, or it may just say it's ready to
accept command. Now I cant tell you much as far as what the commands are
from here, at least not without know the model of the Hub, but you need
to check the auto-negotiate settings for the SPECIFIC port that the SE
is plugged into. The best thing to start with in fact is to manually
force the speed mode for that port (the one the SE is in) to 10 Mbps
Full-duplex or Half-duplex (you'll need to figure out which the Ethernet
card in the SE runs at). I think the SE's used SCSI interface Ethernet
cards, is this right? Has the SE (with the current SCSI card in it) ever
successfully connected, auto-negotiated and operated on a network? Are
you using System 6 or 7?
I hope this helps. Feel free to e-mail me if you need any help. I
would say the answer is in what I explained above. I'm a Cisco certified
network Admin and I've been a network Administrator for years -- I've
seen the really old Macs (actually it's typically more a problem of the
3rd party Ethernet cards -- especially SCSI ones -- then the Macs
themselves) have trouble completing auto-negotiation. It's usually
easily fixed by setting that machines port manually to 10baseT full/half
duplex (just make sure you find out the correct duplex mode). By the
way, some Hubs don't have a Console port on them. This is usually the
smaller 5 port models that are really cheap. I would think the 3Com
would have a terminal / console port on it. Just look on the back, it
should stick out from other ports.
Ethernet standards are pretty well implemented most of the time, so I
think this is something that can easily be corrected. It's definitely a
low-level problem and not software related in my opinion.
Hope this helps, Good Luck!
-- Dylan
Manuel Marques wrote:
> Maybe it could be an issue with the autosensing feature - my IIci's
> Asanté card required a 10baseT hub in order to work. Connecting it to
> my 10/100 router would result in a failed connection.
>
> Regards
> Manuel Marques
> ---
> [email protected]
> http://bsodblog.no.sapo.pt
>
>
>
> On 29/01/2009, at 17:43, Nico Vanden Eynde wrote:
>
>
>> Hi,
>>
>> I have been using pure 10Mbps 3Com Hubs in the past to connect my
>> Compact
>> Macs to the Internet.
>>
>> Problem: I bought an old 3Com OfficeConnect 10/100 Mbps Hub with 16
>> ports in
>> order to let the old Compact Macs like the MAC SE still connect to the
>> Internet at 10 Mbps and my Powermacs and Imac at 100 Mbps.
>> Now the Hub freezes randomly when I use my Mac SE: you suddenly get
>> 100%
>> bandwidth utilisation on the 3Com Hub and it's stuck.
>> Sometimes it happens at boot of my Mac SE, otherwise later. The Hub
>> does
>> detect the speed of the Mac SE and gives an orange Led (=10 Mbps
>> link )
>>
>> Anyone familiar with this problem ?
>> I thought the 3Com 10/100 Mbps Hubs were compatible with Vintage
>> Macs ?
>>
>>
>> Thanks,
>>
>>
>> Nico
>>
>>
>
>
> >
>
>
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