Unable to select IVR menus starting from Call Flow App from external call

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BlueIceK9

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Hi,
i'm trying to setup a call flow app in order to properly handle holidays according to my business (we offer helpdesk service and we are open for support also in some holidays and closed in others) since the standard holidays doesn't work for me.
i've created an app that routes the call to a fake extension after evaluating the time and date. the fake extension is 790

on this extension i've setup the working hours and it forwards the call to the main ivr extension or helpdesk ivr extension based on this and from this the customer can browse the ivr using dtmf and selection the proper menù items.

trunks's rules:
chrome_JQ7ighHZVP.jpg

fake main extension's forward rules:
fake main extension with forward rules

main ivr menu options:
joKIZHzpJs.jpg


using this setup everything works perfectly.
i've tried to install the CF APP and updated the trunk's settings to forward call to the app, but i'm facing a problem with external calls... testing it internally calling directly the CF extensions, everything works fine and i can reach the ivr and browse the menus, but calling from the external i can reach the IVR but the dtmf aren't working properly.
i've posted the menu of the first ivr selection, i can reach it but i can select ONLY the button 2, another IVR DESTINATION and from tis ivr the 5 possible selection don't work, and they are all QUEUE items. it looks like if, passing from a CF APP i can't reach a QUEUE.

can you help me to find where the problem can be?

my pbx release is: 18.0 (Build 912)

my trunk options are these:
chrome_kOPdJr1NQI.jpg
 
I just tried to reproduce this in a testing environment, and works as expected. Most probably, your SIP Trunk is sending DTMF digits as in-band audio, instead of doing this using RFC2833 signals over RTP. This can be confirmed in a Wireshark capture.
 
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