[Freeswitch-users] DTMF filter (RFC2833)

Christopher Rienzo cmrienzo at gmail.com
Tue Aug 1 12:40:00 UTC 2017


I don't think this exists in FS.  You can create a small dialplan APP that
installs a DTMF hook and drops all digits that aren't 0-9,#,* by returning
SWITCH_STATUS_FALSE to drop and SWITCH_STATUS_SUCCESS to allow.
 mod_dptools.c and switch_ivr_async.c have examples of DTMF hooks.


On Tue, Aug 1, 2017 at 2:36 AM, Mickael Hubert <m.hubert at hexanet.fr> wrote:

> Hi list,
> I'm looking for a way to filter ingress DTMF on A leg.
> I receive "bad" DTMFs from SIP provider (Signal A,B,C, etc ...) I want to
> filter only these DTMF, not all others.
> I receive only RFC2833 DTMF.
>
> Ex:
> Sip Provider -- (DTMF 1,A,2,C on A leg) --> FS --> (DTMF 1,2 on B leg) -->
>
> Do you have an idea for me please ?
>
> Thanks in adavance
>
>
> FS version: FreeSWITCH Version 1.3.13b+git~20130213T200819Z~cd7d1efc2a
> (git cd7d1ef 2013-02-13 20:08:19Z)
>
> --
> Mickaƫl HUBERT
> Responsable du service VoIP
> Tel: (+33) 03.26.79.30.05 <+33%203%2026%2079%2030%2005>
>
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