# System Asterisk could not receive DTMF

**URL:** <https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217>\
**Category:** Asterisk APIs\
**Created:** [January 16, 2018, 9:00am UTC](https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217 "2018-01-16T09:00:39Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![namle](https://avatars.discourse-cdn.com/v4/letter/n/3da27b/32.png) [@namle](https://community.asterisk.org/u/namle)\
**Post date:** [January 16, 2018, 9:00am UTC](https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217/1 "2018-01-16T09:00:39Z")

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Hi all,  
I have a auto IVR . But a few week I had problem with DTMF when system have many call one time. System could not receive DTMF in some call.  
EX: We test 20 call to IVR one time but some call could not receive DTMF so IVR not working correct  
Please help me about that problem. I losed 2 week for that problem ☹

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**Author:** ![david551](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@david551](https://community.asterisk.org/u/david551)\
**Post date:** [January 16, 2018, 10:21am UTC](https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217/2 "2018-01-16T10:21:36Z")

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How was the DTMF being signalled to you? Which channel technology were you using? If VoIP, which codecs were you using?

What did you do in the two weeks to try and isolate the problem?

These questions are mainly there to allow us to know which questions we really need to ask.

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**Author:** ![namle](https://avatars.discourse-cdn.com/v4/letter/n/3da27b/32.png) [@namle](https://community.asterisk.org/u/namle)\
**Post date:** [January 16, 2018, 10:47am UTC](https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217/3 "2018-01-16T10:47:10Z")

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Hi David, thanks about your reply.

- I write a agi (callagi.php). I try using 2 command (background and get data) to play sound and catch DTMF from call when they press any key.
- Channel Technology: SIP trunk
- Codecs: G711  
I’m using call file to run auto call to many phone number one time (about 40 call one time). But some time my client press key so asterisk could not catch DTMF (about 10-20% call) .
- I try split to many context dialplan from AUTO\_CALL -\> AUTO\_CALL\_5 to offload to the system (Previously there was only one context AUTO\_CALL )

ex: I have 40 call file to call one itme  
call file 1-\>8. I using context AUTO\_CALL  
9-\>16. I using context AUTO\_CALL\_2  
… 32-\>40… I using context AUTO\_CALL\_5  
But asterisk still not receive DTMF some call :(. I try with many different devices (Iphone, Samsung,xiaomi) …

Here is content **call file**  
Channel: local/0987654321@from-internal  
Maxretries: 0  
RetryTime: 30  
Context: AUTO\_CALL  
Extension: 0987654321  
Callerid: AUTO CALL \<0123456789\>

Here is content context **AUTO\_CALL**  
[AUTO\_CALL]  
exten =\> \_XX.,1,Progress()  
exten =\> \_XX.,n,AGI(callagi.php,${action},${call\_id},${schedule\_id},${phone},${EXTEN},${data\_1},${data\_2},${data\_3},${data\_4},${data\_5})  
exten =\> h,1,AGI(callagi.php,hangup,${call\_id},${schedule\_id},${phone},${EXTEN},${data\_1},${data\_2},${data\_3},${data\_4},${data\_5},${STATUS\_CALL},${KEY\_PRESS})

Please help me ☹  
Thanks about for any your help

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<div class="post-metadata">

**Author:** ![david551](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@david551](https://community.asterisk.org/u/david551)\
**Post date:** [January 16, 2018, 10:49am UTC](https://community.asterisk.org/t/system-asterisk-could-not-receive-dtmf/73217/4 "2018-01-16T10:49:30Z")

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The first question was about dtmfmode.