[OT] Networking...

Was on a client site yesterday to add a second network device in an office that 
had a single patch point going back to the "server room" downstairs (Heh.. 
under the stairs actually). I didnt particularly want to pull cables, so I 
thought I'd cheat, and downgrade the existing, and the new device to 10BaseT, 
and do a 4 wire cabling job to both devices, splitting the existing 8 wire Cat5 
at each end, and wiring for the yellow and green pairs only.

Funny thing is, both devices are happily operating at 100BaseT, whereas I 
thought that more than 4 wires were required for 100BaseT.

Is this because they're going back to a very cheap unmanaged switch? Or has it 
something to do with simplex / duplex operation, or what limitations have I 
imposed on this user?

Boris.


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