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DTMF with snom 375 with AVM Fritzbox 7590

Do you have any hint how to use sending DTMF tones if the snom is linked with an AVM Fritzbox 7590? 


The fritzbox is registered with a landline of Deutsche Telekom. The Snom is registered at the FRitzbox.

I found no method to send DTMF tones in this constellation.

1 Comment

Hello,


I am not sure what is needed by the Fritzbox, but Snom phones support 3 methods for DTMF: in-band, RFC2833 and SIP INFO. I suggest to just try all 3 of them and see which works better for your case.


To prioritize In-Band, the settings must be:
         - setting http://wiki.snom.com/Settings/codec_priority_list must not contain "telephone-event"
         - setting http://wiki.snom.com/Settings/user_dtmf_info must be set to "off"

To prioritize RFC2833, the settings must be:
         - Snom setting  http://wiki.snom.com/Settings/codec_priority_list must contain "telephone-event"
         - Snom setting http://wiki.snom.com/Settings/user_dtmf_info must be set to "off"

To prioritize SIP INFO, the settings must be:
         - Snom setting  http://wiki.snom.com/Settings/codec_priority_list must not contain "telephone-event"
         - Snom setting http://wiki.snom.com/Settings/user_dtmf_info must be set to "sip_info_only"


Thanks

Catalina


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