Hi all, I've followed all the previous suggestions to detect the inband DTMF coming from a provider and to drop them from going further into B leg. However the inband DTMF still goes to otherside and user can hear clicking sounds. Here's what I've done so far: *VERSION:* FreeSWITCH Version 1.10.2-release+git~20191231T140119Z~f7bdd3845a~64bit (git f7bdd38 2019-12-31 14:01:19Z 64bit) *OS:* Ubuntu 18.04.4 LTS *DIALPLAN:* <extension name="dtmf_filter"> <condition field="${acl(${network_addr} lan)}" expression="true"/> <condition field="destination_number" expression="(.*)"> <action application="set" data="rtp_manual_rtp_bugs=FLUSH_JB_ON_DTMF|ignore_dtmf_duration"/> <action application="set" data="jitterbuffer_msec=1p"/> <action application="set" data="spandsp_dtmf_rx_filter_dialtone=true"/> <action application="set" data="dtmf_verbose=true"/> <action application="set" data="drop_dtmf=true"/> <action application="spandsp_start_dtmf"/> <action application="bridge" data="{bridge_filter_dtmf=true,drop_dtmf=true}sofia/gateway/CISCO_GW/$1"/> </condition> </extension> I've also tried suggestion by other users on mailing list related to flush JB on DTMF rtp_bug but that doesnt help either. *CONSOLE OUTPUT:*2020-05-12 23:59:10.195999 [DEBUG] mod_spandsp_fax.c:295 FLOW DTMF Potentially '5' - total -15.55dB, row -32.25dB, col -40.30dB, duration 338436 - miss 2020-05-12 23:59:10.195999 [DEBUG] mod_spandsp_fax.c:295 FLOW DTMF Potentially '5' - total -17.99dB, row -30.58dB, col -40.99dB, duration 338538 - miss It does detect the number but its not a hit. Can I get some more ideas how to drop inband DTMF tones, Thanks. Best Regards, Sammy