Good SIP quality only if I reboot server frequently


An IVR is accessible through FXO or through SIP (I have two different numbers) on the same server. The prompts of the IVR are WAV files.

If I call through PSTN/FXO, the quality is good. But if I call through SIP, the prompts will be terrible quality (only first few seconds of the prompts). It is only after I reboot the server that the quality will be good (even better than FXO).

The problem is that I don’t want to reboot my server every day …

Does anyone has an idea why I need to reboot my server so frequently for the SIP to work well, as the audio prompts are fine through FXO even if the server hasn’t been rebooted for a year.

thank you for any help!

at the time that you are having the bad audio quality issue, why dont you test another audio format as sln. you can convert your audio filex using sox

sox ivr.wav -t raw -r 8000 -s -2 -c 1 ivr.sln