> >These should probably all be checked, if James is gonna cast them >on techref, but I seem to recall 48v was supposed to be the nominal >voltage applied at the telco end - miles of wire away. Even that, I've seen as low as 12V and as high as 52, 24 is not uncommon. 48 is the correct "nominal" number, but the telco may supply other "nominal" voltages depending on the equipment in use. The on-hook voltage is almost immune to line length variation though, since almost zero current is flowing. -- Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu