
References
Telephone line interface for PC
The device serves as a telephone line interface for PC. The device connects between the telephone set and the line and allows the transmission of audio to and from the computer, including the ability to listen in and enter the call.
The second option is to connect the cable directly to the handset (microphone) of the device. The device supports rich signaling options, line current and voltage detection, ringing, etc. From the PC side, the device acts as a sound card; the signalling functions are transmitted as USB HID data and are also available via a C# library.
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