DComTalk.com

I'm looking for the simplest possible hardare implementation that I can
connect via cat5 ethernet cable to my router that my router will
recognize as a node on the network, and be willing to send it data,
even if that data is simply dropped on the floor, so to speak.

Is it possible to just use a power supply and ground to set certain
pins on the cable a constant high or low?

bmearns wrote:

I'm looking for the simplest possible hardare implementation that I can
connect via cat5 ethernet cable to my router that my router will
recognize as a node on the network, and be willing to send it data,
even if that data is simply dropped on the floor, so to speak.

Is it possible to just use a power supply and ground to set certain
pins on the cable a constant high or low?

Oh, that's what you mean.

A 10baseT transceiver and a power supply should do it.

-- glen

"If you can't be bothered to check back here, we can't be
bothered to reply."

glen herrmannsfeldt wrote:

bmearns wrote:

I'm looking for the simplest possible hardare implementation that I can
connect via cat5 ethernet cable to my router that my router will
recognize as a node on the network, and be willing to send it data,
even if that data is simply dropped on the floor, so to speak.

Is it possible to just use a power supply and ground to set certain
pins on the cable a constant high or low?

Oh, that's what you mean.

A 10baseT transceiver and a power supply should do it.

-- glen

Or a cheap hub or switch. They might be more readily available.

Or a cheap hub or switch. They might be more readily available.

Are you sure a router would actually dump data to a hub or switch
without any other connection ?

I'm looking for the simplest possible hardare implementation that I can
connect via cat5 ethernet cable to my router that my router will
recognize as a node on the network, and be willing to send it data,
even if that data is simply dropped on the floor, so to speak.

Is it possible to just use a power supply and ground to set certain
pins on the cable a constant high or low?

Any help is greatly appreciated. Thanks.

Gerard Bok wrote:

Or a cheap hub or switch. They might be more readily available.

Are you sure a router would actually dump data to a hub or switch
without any other connection ?


Something like UDP or ICMP would work fine, as they don't require a
"connection" to the other computer, the way TCP does. All they need, is a
working network connection and they don't care what's beyond.

Oh, that's what you mean.

A 10baseT transceiver and a power supply should do it.

Or a cheap hub or switch. They might be more readily available.

Or a cheap hub or switch. They might be more readily available.

He ask for the simplest. I have heard of people powering a transceiver
off a standard 9 volt battery, though probably not for very long.

glen herrmannsfeldt wrote:

Or a cheap hub or switch. They might be more readily available.

He ask for the simplest. I have heard of people powering a transceiver
off a standard 9 volt battery, though probably not for very long.


Or, if he can find one, and old 10base2 NIC, a T coupler and a pair of
terminators should do it too. He could also use a 24 ohm resistor, in
place of the coupler and two terminators. Can't get much simpler than
that.

Or, if he can find one, and old 10base2 NIC, a T coupler and a pair of
terminators should do it too. He could also use a 24 ohm resistor, in
place of the coupler and two terminators. Can't get much simpler than
that.

It seems to get simpler and simpler :-)

But how would an ancient NIC (unpowered ?) and a 24 ohm resistor
been recognized (as a node) by a router, let alone tempt it to
transmit data ?

Gerard Bok wrote:

Or, if he can find one, and old 10base2 NIC, a T coupler and a pair of
terminators should do it too. He could also use a 24 ohm resistor, in
place of the coupler and two terminators. Can't get much simpler than
that.

It seems to get simpler and simpler :-)

But how would an ancient NIC (unpowered ?) and a 24 ohm resistor
been recognized (as a node) by a router, let alone tempt it to
transmit data ?


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.

glen herrmannsfeldt wrote:

Or a cheap hub or switch. They might be more readily available.

He ask for the simplest. I have heard of people powering a transceiver
off a standard 9 volt battery, though probably not for very long.

Or, if he can find one, and old 10base2 NIC, a T coupler and a pair of
terminators should do it too. He could also use a 24 ohm resistor, in
place of the coupler and two terminators. Can't get much simpler than
that.

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.