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