[asterisk-users] delay in processing dtmf

[Ioan Indreias]

Have you used a mobile phone when you test the "fast speed DTMF sequence"?
We have found that in GSM network DTMF digits are sent out-of-band from the
terminal (despite the tones generated by phones) and are "injected" in-band
into the audio channel _but_ with some delays between digits. At least this
is the situation in Romania (Vodafone and Orange GSM networks).

HTH,
Ioan (Nini) Indreias
www.modulo.ro

On Mon, Oct 19, 2009 at 10:54 PM, Danny Nicholas <danny at debsinc.com> wrote:

>  The default setting of tonedur in dahdi.conf is 80.  This means that each
> DTMF key you press takes 80 ms to transmit across  the “line”.  When mine
> got changed to 300, it made my in-house calls take 2-5 seconds to connect
> and outgoing calls 7-11 seconds.  Genconf_dahdi changes this if you
> regenerate (I think).
>
>
>  ------------------------------
>
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Waruna de Silva
> *Sent:* Monday, October 19, 2009 1:44 PM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Subject:* Re: [asterisk-users] delay in processing dtmf
>
>
>
> Hey thanks for that,
>
> but can you give more details on that.
>
>
>  On Mon, Oct 19, 2009 at 11:46 PM, Danny Nicholas <danny at debsinc.com>
> wrote:
>
> You might want to play with tonedur in dahdi.conf.  This IME effects SIP
> calls as well.
>
>
>  ------------------------------
>
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Waruna de Silva
> *Sent:* Monday, October 19, 2009 1:06 PM
> *To:* asterisk-users at lists.digium.com
> *Subject:* [asterisk-users] delay in processing dtmf
>
>
>
> Hi,
> I'm new to this list
>
> I'm developing asterisk application where users can call and control volume
> up and down in music player.
> Problem I'm getting is if users press 222228 in fast speed, system will
> process all those 2s and then process 8, so there is few seconds ( around
> 4-5) processing key press 8 , therefore users will feel unresponsiveness in
> system.(in other words users will press those six keys in 2.5 seconds and it
> will take 5 seconds to process them),its not application's problem. may be
> within asterisk.
>
> this only happen when users call from physical phone, if they use softphone
> eg: Xlite then this delay wont happen.
>
> think this is because network latency in telephony networks. Are  there any
> work around or possible solutions? Please anyone know, give me
> some idea.
>
> Thanks in advance
> Waruna.
>
>
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