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James Knott
Guest
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 Posted:
Sun Nov 27, 2005 5:20 pm Post subject:
Re: Simplest hardware node |
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Gerard Bok wrote:
| Quote: | I would assume that if he's trying to send data, he'd have a NIC
somewhere.
If he can plug in a 10base2 NIC, that should do. It gets the power from
the computer. All he needs is a NIC of some time that's connected to a
real circuit. With twisted pair, that means he needs a switch or hub to
plug into, with coax type NIC, he only needs the proper termination.
He wants the cheapest device that will lure his router into
sending actual data to it.
I can only see a NIC qualify his needs if this NIC is placed in a
more or less fully functional PC.
Am I missing something here ?
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He needs a NIC of some type. All we've done is suggest some possibilities.
He has to use some common sense. I'm not saying he has to use 10base2. I
just offered it as a simple, cheap possibility. If he has such a NIC and a
computer that can take it, great. If not he has to look at some other
alternative.
I hate it, when some people try to impose restrictions that the OP hadn't
mentioned. |
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glen herrmannsfeldt
Guest
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| Posted:
Mon Nov 28, 2005 4:34 am Post subject:
Re: Simplest hardware node |
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James Knott wrote:
| Quote: | glen herrmannsfeldt wrote:
Maybe I missed something, but I believe most 10baseT devices won't send
data out unless they see link pulses coming in. A source of link pulses
can be convenient in testing. One can then do whatever one wants with
the bits coming out from the device.
I said 10base2, which is the old coax type ethernet. IIRC, it doesn't use a
link pulse. However, a baseT connection to a hub or switch should be OK as
the link pulse is use to check the connection to the hub/switch, not to
verify there's another computer on the network
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With 10base2 you need the terminating resistor if at the end, otherwise
just a tee connector to get the bits to fall on the floor, as the OP
requested. For 10baseT you need link pulses.
One possibility is a device to indicate any traffic on the port, which
the LEDs on many transceivers will indicate.
One problem is that the switch might not send unicast packets that
direction, but that will be true in any case.
-- glen |
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James Knott
Guest
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| Posted:
Tue Nov 29, 2005 4:50 am Post subject:
Re: Simplest hardware node |
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glen herrmannsfeldt wrote:
| Quote: | I said 10base2, which is the old coax type ethernet. IIRC, it doesn't
use a
link pulse. However, a baseT connection to a hub or switch should be OK
as the link pulse is use to check the connection to the hub/switch, not
to verify there's another computer on the network
With 10base2 you need the terminating resistor if at the end, otherwise
just a tee connector to get the bits to fall on the floor, as the OP
requested. For 10baseT you need link pulses.
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In another note, I mentioned using a 24 ohm resistor, in place of two
terminators and T connector. |
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