> I've a problem with a TDM400P digium card. > > My box has no molex connectors for power supply. Simply has no any power > connector, because is not a normal PC) And I need to know if i can use a > external supply. But I've several questions: > > 1.- Are both circuits (PCI-power and Phone-line-power) electrically > separated? > 2.- A little voltage difference can create an undesired internal current? > 3.- What are the current needs for this supply? > > I need the power supply because I want to use both FXS and FXO ports. > And I can't use a Y cable, because I've no molex connectors.
Been discussed several times before and you should have found the answer using google. The TDM connector is only used for the fxs modules, and then only the +12 volt lead on that connector (and ground) is actually wired to anything on the TDM board. So, there is no conflict with internal system voltages. Yes you can use an external 12 volt power supply. The 12 volts is only used on the card to generate ringing voltage to the fxs modules. No ringing, no significant current draw. Just about any 12 volt supply should do, however I think I'd be looking for one that is at least somewhat regulated. No other idea on the power supply specs. _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users