[Freeswitch-users] Volume of DTMF tones

Hi there, We received the following comment from a customer who is not able to use DTMF tones generated from FreeSWITCH. The call flow is PSTN ------> FS -----> PSTN i.e. simple call forwarding. The comment reads: "we had our phone system tech out yesterday. He tested the line and noted that when the forwarded (FreeSWITCH) line is forwarded the DTMF tones were weak. When our main line was called directly the DTMF tones were clear and strong. Perhaps by boosting the power during the forwarding process this can be rectified. I hope that helps. I am using start_dtmf_generate Is there a way of boosting the volume of the generated tones? Or just a better way to handle this situation? Thanks so much for any advice Pj