If your signal is so quiet that the spandsp FAX can't detect it, then nothing else will either. Regards, Steve On 12/23/2014 04:41 AM, Ali Pey wrote:

Hello,

Is there anyway to make fax tone detection more sensitive?

I use spandsp_start_fax_detect for the first 10 seconds of the call and fax tones are not always detected. It seems that if the tone is not loaud enought, freeswitch doesnt' detect it.

Thanks, Ali Pey