[asterisk-users] DTMF digits are coming through twice

Don Kelly dk at donkelly.biz
Wed Oct 10 16:18:55 CDT 2012


Is this happening for all callers, or just iPhone callers?

--Don

 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Vik Killa
Sent: Wednesday, October 10, 2012 11:29 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] DTMF digits are coming through twice

I'm not sure I follow, the packet capture on the asterisk server shows
double digits being entered. Does that mean it's the source?

On Wed, Oct 10, 2012 at 11:55 AM, SamyGo <govoiper at gmail.com> wrote:
> Hi,
>
> Not exactly a solution, but I'm sure you must've taken pcap traces of 
> a few such sample calls. See in their RTPs that you are receiving 
> repeatedly same RTPs which will tell you that any DTMF packet is 
> coming in twice by the source or not !
> just one such simple pcap will help you identify at whose end the 
> issue lies. If the source is your vendor sending you RTPs twice for 
> DTMFs then send them the capture and ask them to fix it however they can.
>
> BR,
> Sammy
>
> On Wed, Oct 10, 2012 at 8:44 PM, Vik Killa <vipkilla at gmail.com> wrote:
>>
>> I've been running an Asterisk server (1.6.2.17.2) for over a year 
>> without any major issues. All of a sudden people are unable to login 
>> to their voicemail because Asterisk is seeing DTMF twice for each 
>> digit the caller pushes. We've noticed the problem only consistently 
>> happens to callers from specific locations. All the locations having 
>> the issue use te same ITSP and internet provider. The ITSP swears 
>> it's not them because they tested outside their phone system, 
>> straight from a d-mark. We've tinkered and played with all options in 
>> Asterisk related to DTMF with no success. Aside from upgrading 
>> Asterisk, I'm at a loss as to how to fix this. This system has worked 
>> for over a year without this issue and all of a sudden it appears. My 
>> thought is that it's the internet provider (Earthlink) but they say 
>> it can not possibly be them. Here is my DTMF settings in sip.conf:
>> dtmfmode=rfc2833
>> relaxdtmf=yes
>>
>> Any input appreciated! Thanks.
>>
>> --
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>
>
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