Voice Recorder over Asterix ( Sangoma E1 card, VOIP)

I need a Linux-based offline voice recording application that operates over Asterix using a Sangoma E1 line and VOIP. This application should have a Command-Line Interface (CLI) and save recordings in WAV format.

Key Requirements:
- The application must be compatible with Linux
- It should feature a Command-Line Interface (CLI)
- Recordings need to be saved in WAV format

Ideal Skills:
- Extensive experience with Linux development
- Command-Line Interface (CLI) design and implementation
- Asterix telephony platform knowledge
- VOIP and Sangoma E1 line familiarity
- Audio programming and WAV encoding expertise