I've seen this same circuit with many different capacitor values. The values range from 1.0uF to 47000 pF. Which would be the most appropriate for good quality sound? I understand that the capacitor is used to block DC in the circuit and keep the line from going off-hook. I don't understand the range of the capacitors used nor the use of the resistor. Any insight would be appreciated. ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![phone_circuit_schematic.jpg phone_circuit_schematic.jpg](https://forum.allaboutcircuits.com/data/attachments/73/73470-a109e42b6944ee3ed020ba7db5bb85b1.jpg)
![phone_circuit_schematic.jpg phone_circuit_schematic.jpg](https://forum.allaboutcircuits.com/data/attachments/73/73470-a109e42b6944ee3ed020ba7db5bb85b1.jpg)