Hello everybody,

 

I really need some help here!

 

I’m trying to use FS for making both inbound and outbound calls through Broadvox.

Everything works perfectly except one particular situation with DTMF problem.

In case of inbound calling (I’m calling FS), everything works fine. Call connects and I can send DTMF to FS and FS recognized those 100% (Testing with softphone from my desktop, SIP phone in the office, and all wireless carriers)

However, I am having trouble with outbound calling. I have set it up to where FS makes an outbound call to certain number and once the call is answered, we start playing some custom IVR.

Here, it works fine with softphone from my desktop, SIP phones in the office, AT&T, and Verizon. But for some reason FS will not recognize the DTMF coming from T-Mobile cell phones.

Anyone has any idea? Below are my current setting from external.xml which was recommended by Broadvox.

 

<param name="codec-prefs" value="PCMU,G729"/>

            <param name="dtmf-type" value="rfc2833"/>

            <param name="auto-rtp-bugs" value="clear"/>

            <param name="pass-rfc2833" value="true"/>     

            <param name="inbound-late-negotiation" value="true"/>

           

            <param name="sip-trace" value="no"/>

            <param name="sip-capture" value="no"/>       

            <param name="rfc2833-pt" value="101"/>

            <param name="sip-port" value="$${external_sip_port}"/>

            <param name="dialplan" value="XML"/>

            <param name="context" value="public"/>

            <param name="dtmf-duration" value="1000"/>

            <param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>

            <param name="outbound-codec-prefs" value="$${outbound_codec_prefs}"/>

            <param name="hold-music" value="$${hold_music}"/>

            <param name="rtp-timer-name" value="soft"/>

 

 

 

Best regards,

 

Phil Kim

 

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