[Freeswitch-users] DTMF Issue - Unexpected digits are receiving

Chandramouli P mouli123 at gmail.com
Wed Oct 24 05:52:13 UTC 2018


Hello Branden,

Thank you for your reply. As you said, I do understand about A-D DTMF
digits. But, my problem is to regenerate the issue i.e. ("A"). Which key
(s), I have to press to send "A" as DTMF digit? I am sure that the end user
is used regular mobile phone dialer only, and not softphone.

Thank you.

Best Regards,
Chandramouli.

On Wed, Oct 24, 2018 at 2:58 AM Branden Jordan <BJordan at e-teleco.com> wrote:

> A is a valid DTMF digit so I wouldn’t worry about it too much and just
> handle A-D in your valid TT fields. I see around a million calls a day and
> see a few hundred A-D DTMF. It’s rare, but some really old phones still
> have the A-D DTMF on them, and softphones have the ability to send them as
> well, maybe your user is using a softphone on their end?
>
>
>
> *From:* FreeSWITCH-users <freeswitch-users-bounces at lists.freeswitch.org> *On
> Behalf Of *Chandramouli P
> *Sent:* Monday, October 22, 2018 11:23 PM
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Subject:* Re: [Freeswitch-users] DTMF Issue - Unexpected digits are
> receiving
>
>
>
> Hello Abdullah,
>
>
>
> Thank you for your reply. By following your hint, I tried to regenerate
> the issue. I tried by getting voice mail beep, other beeps like receiving
> SMS, WhatsApp messages etc. But, unable to simulate.
>
>
>
> Thank you.
>
>
>
> Best regards,
>
> Chandramouli.
>
> On Mon, Oct 22, 2018 at 8:00 PM Vallimamod Abdullah <vma at vallimamod.org>
> wrote:
>
> Hi,
>
>
>
> I encountered the same issue in the past and have noticed that it was the
> mobile voicemail beep tone that was sometimes converted to 'A' dtmf on the
> isdn gateway.
>
>
>
> Maybe your case is similar?
>
>
>
>
>
> Best Regards,
> --
> Vallimamod Abdullah
> SIP Solutions
> vma at sip.solutions
> linkedin.com/in/vallimamod
> .
>
>
>
> On 22 Oct 2018, at 08:24, Chandramouli P <mouli123 at gmail.com> wrote:
>
>
>
> Hello David,
>
>
>
> Thanks for your reply and I understand. But, As I explained, we tried to
> regenerate the issue by pressing different keys on dial pad. But,
> FreeSwitch is receiving the digits as usual every time. So, which key was
> pressed by the user on dial pad to send "A"? Any assumptions?
>
>
>
> Thank you.
>
>
>
> Best regards,
>
> Chandramouli.
>
> On Sun, Oct 21, 2018 at 10:53 PM David Villasmil <
> david.villasmil.work at gmail.com> wrote:
>
> From what i know, "A" is a multifrequency tone, 697hz+1633hz. Maybe the
> client is actually sending that.
>
>
>
> On Sat, Oct 20, 2018, 17:54 Chandramouli P <mouli123 at gmail.com> wrote:
>
> Hello,
>
>
>
> We developed an application (FreeSwitch) that receives pressed digit by
> the end user on mobile phone dialer through DTMF and some action will be
> performed. Everything is working fine till now. But, we noticed one issue
> recently. From the FreeSwitch log, we came to know that FreeSwitch is
> received the letter i.e. "A" from DTMF, instead of digit. We tried to
> regenerate this issue. But, when we are trying to regenerate, FreeSwitch is
> receiving the digit from DTMF as usual. I would like to know How FreeSwitch
> is received the letter i.e. "A", instead of digit. Which key was pressed by
> the end user on mobile phone dialer?
>
>
>
> Thank you.
>
>
>
> Best Regards,
>
> Chandramouli.
>
>
>
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>
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