12 Jul
2002
12 Jul
'02
2:18 p.m.
"Peter C. Wallace" <pcw(a)mesanet.com> wrote:wrote:
As far as damaging the rest of the circuitry goes
that depends on
whether the PHY can take the 48V ~1 usec spikes resulting from
connection the isolation transformer input to one (or many) 48V steps
as the connectors are mated...
A well-designed Ethernet card has some Zener diodes for protection against
that. I suppose there are probably plenty of poorly designed cards out
there, though.