> In TE mode card works perfectly...In Nt mode When I try to connect > isdn phone(ascom eurit 133) , i hear nothing (with cross-over isdn > cable or not). As i know in NT mode isdn card provides voltage > (38-40V),that's right?? There is no voltage between pins 3,4,5,6... > Maybe my card doesn't have support for NT mode???
I think you dont have power on the ISDN bus, the board dont do that, you need external power feed, i use a lot of hfc-pci boards, with some equipments there is no need of power on bus, with some the power is required only to see "ok the isdn signal is there", some equipments need this power to go on and work.. (as your phone). How to power the bus? i found a lot of examples on internet, the more simple solution, for me, is to use the telco NT1 box, it has 220V power cord, a telco connector (two wires) and two isdn connectors; i dont use the telco connector, i put my isdn board with a cross-link cable on the first connector, and the phone on the second, and the 220V power supply, simple and efficent (and no cost, in Italy this kind of box is frequently abandoned by the telco provider). :-)
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