[time-nuts] Nortel Trimble thunderbolt

[Chris Albertson]

On Fri, Jul 5, 2013 at 7:03 PM, Ed Palmer <ed_palmer at sasktel.net> wrote:

> I always cursed when I tried to figure out how to wire an RS232 cable
> until I realized that transmit had a voltage on it while receive was close
> to zero volts.  So now I just remember that volts on one end connects to no
> volts on the other end.  Works every time and I don't have to think about
> straight or cross-over.


That only works if there are only three wiresand no handshaking.  What if
there is DTE/DCE and so on?

But I think in this case it is just a three wire connection but still there
is room for errors like for example is one of them a TTL level and the
other RS-232.  Some times you can mix the two, sometimes not.

-- 

Chris Albertson
Redondo Beach, California