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08.12.2008 at 05:22AM PDT, ID: 23640894
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7.8

Strange DTMF received on a incoming call

Asked by eigbar in Asterisk Open Source Telephony, Voice Over IP, IP PBX Systems

Tags: , ,

We have a Asterisk 1.4.21.2 box conected to several VoiP trunks and E1 links (through Mediant 1000 gateways), and the calls are sent to SIP peers. Sometimes, during incoming calls, our users are able to hear some beeps similar to DTMF digits. See examples bellow (they are portuguese conversation, but you can hear the sounds).

http://www.katizak.locaweb.com.br/asterisk/beep.mp3
http://www.katizak.locaweb.com.br/asterisk/beep2.mp3
http://www.katizak.locaweb.com.br/asterisk/beep3.mp3
http://www.katizak.locaweb.com.br/asterisk/beep4.mp3

On the other side of the conversation, we are pretty sure they are not pressing any button in their phones.

Do you guys have any guess about where these sounds are coming from? Is there any configuration that can prevent the SIP peers from receiving DTMF digits, while they still can send DTMF outside?

Thanks for any help you may provide!Start Free Trial
[+][-]08.12.2008 at 06:15AM PDT, ID: 22212706

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[+][-]08.12.2008 at 07:08AM PDT, ID: 22213206

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[+][-]08.12.2008 at 07:17AM PDT, ID: 22213297

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[+][-]08.12.2008 at 07:38AM PDT, ID: 22213525

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[+][-]08.12.2008 at 07:55AM PDT, ID: 22213716

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[+][-]08.13.2008 at 05:48AM PDT, ID: 22221178

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About this solution

Zones: Asterisk Open Source Telephony, Voice Over IP, IP PBX Systems
Tags: Digium, Asterisk, 1.4.21.2
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Solution Provided By: eigbar
Participating Experts: 1
Solution Grade: A
 
 
 
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