12 Jul
2002
12 Jul
'02
5:11 a.m.
On Thu, 11 Jul 2002, Eric Smith wrote:
Strange, a 10baseT/100baseT Ethernet interface should
be able
withstand telephone voltages (even ringing), even if the jack has them
wired to the data pairs. Even if it sustained damage, there should
not have been any sparks.
Many of those commercial/digital phone systems often have 24VAC or
something similar available to power the phone on one of the pairs. Most
of them also have quite a bit of current available. I've seen a few cable
pair testers loose their magic smoke due to those types of phone systems.
-Toth