Do you have an analog voice modem and a sound card in your pc?

If yes, you can convert it with Advance Phone Recorder to a call recorder.
Advanced Phone Recorder helps you connect your phone to your modem phone socket, make a telephone call as you usually do and pressing the record button, record the conversation to your hard disk.

Every recorded call is kept in a list with information about time, date and your personal comments.

You can set it in auto recording mode where all of your incoming calls will be recorded automatically with no intervention.

You can choose among the different types of compression your modem uses, such as PCM-8bit, PCM-16bit, unsigned PCM-8bit, u-law, a-law, IMA ADPCM, 4-ADPCM

You can choose the compression format of the wav files saved to your hard disk, such as uncompressed PCM, ACELP, a-law, u-law, DSP truespeech, GSM 6.10, IMA ADPCM, Microsoft ADPCM, G723.1, WMA, VOX, BTV digital, Creative fastspeech, MP3 and many others your system supports.

Choosing the right format you can have compression ratio about 2.81Mb/hour.

Post process your wav files. Adjust digitally the recording level. Apply voice equalization between calling and called party. When the volume level of one of the parties is much lower you can increase it with a click of a button.

Here are some key features of "Advanced Phone Recorder":