Bryan Greenberg wrote:

> While this is correct, you can still use the existing 10BaseT cabling
> to connect the terminal to the DTC.  This way the terminals aren't
> interfering with the network and you don't have to run separate cable
> for them.  Upgrading, should it be necessary, is simple.  Just
> replace the terminal with a networkable pc and move the patch cable
> from the DTC to a hub.

Planning is essential here!  TIA568 uses pins 1-2 and 3-6 for 10BaseT
connections.  If you choose some serial scheme using 4-5 and 7-8 for
serial you can avoid any "accidental" mismatches - anything mismatched
is talking to a dead line.  But be wary of various wiring schemes,
ethernet, token ring, ISDN, etc., have standard pinouts; serial pin
assignments over RJ45 weren't quite so lucky though there are some
obvious standards.  At any rate, try to avoid matching live wires of
dislike end devices.

Jeff Kell <[log in to unmask]>