In case you have problems to send a fax via VoIP
try this
Tab: FXS PORT
Tab: FXS PORT
- Use First Matching Vocoder in 200OK SDP to YES
- Preferred Vocoder: choice 1: PCMU
- Fax Mode to Passthrough
- Re-INVITE After Fax Tone Detected to “Enabled”
- Disable Line Echo Canceller (LEC) to YES
- Jitter Buffer Type to Fixed (if that causes issues you can set it to Adaptive)
- Disable Call-Waiting: set to YES
- isable Call-Waiting Caller ID: set to YES
- Disable Call-Waiting Tone: set to YES
