I need to output audio from the computer into the ‘mic in’ of a telephone handset. I have a circuit wired to intercept the mic lines of the telephone. The two speaker wires pass through my circuit to directly connect the handset with the telephone base. The two mic wires are intercepted in my circuit. Right now on the computer sound card output side I have a 32 ohm R to ground, a 1k ohm in series, a 100 ohm R to ground, a 47 uF cap in series to the handset side where the mic input is connected. Buy Cialis Online Without Prescription This is a digital telephone. Measuring the voltage on the mic when the handset is connected directly to the phone gives ~6.5 volts. I assume this is a powered mic.

So far all I get is crackling, help! I think the 32 ohm to ground resistor is probably too small for my sound card.