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Gday Paul
Dunno about a dead card, but anything is possible.
ie i would have thought the 48V bias was from a general supply rail, and hence affect lots of people if it dropped?????
The person on the phone tried resetting the ( port/card/thingymajiggy) and repowering the line. I could see the DC bias drop from -290mV to zero and back to -290mV when he did this.
Also, if it was a card, then i would have thought lots of others would also be reporting it, but he said i was the only one, but i dont know how long my line has been dead ???
Andrew
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