[Freeswitch-users] Problem with missing / duplicated DTMF

[Anthony Minessale]

I dont think there any current dtmf issues open.
It sounds like maybe you are going across the pstn and encountering
some problems with transition from
2833 to inband and back again or from hair-pinning the call.



On Tue, Feb 1, 2011 at 12:00 PM, Matt Stockton <mstockton at harqen.com> wrote:
> Sorry about not including the version. The version of freeswitch I am using
> is.
> FreeSWITCH Version 1.0.head (git-256a82d 2011-01-31 10-12-28 -0600)
>  I just updated to the latest yesterday to re-test it.
> On Tue, Feb 1, 2011 at 10:10 AM, Matt Stockton <mstockton at harqen.com> wrote:
>>
>> I have having trouble with both missing and duplicated DTMF in
>> Freeswitch.
>> Here are the steps of how I am using it:
>> 1. Leg A - I am calling out from my Freeswitch instance (through iCall),
>> and I am calling an iCall number that is also connected to the same
>> Freeswitch instance.
>> 2. Leg B - The above call is routed through iCall and then answered by the
>> same Freeswitch instance.
>> 3. On Leg B, I play a file and attempt to get DTMF in a lua script. Here
>> is the code of interest:
>>
>> callPin = session:playAndGetDigits(1, 10, 4, 30000, "#","/tmp/cw_17.wav",
>> "", "\\d+");
>>
>> 4. On Leg A, I send DTMF information in a lua script. Here is the code of
>> interest. I initiate a delay between each digit:
>>
>> local newPin = "";
>>
>> for i = 1, string.len(pin) do
>>
>>   newPin = newPin .. string.sub(pin, i, i) .. "W";
>>
>> end
>>
>> session:execute("send_dtmf", newPin .. "#@200");
>>
>> ** Note that there is a session:sleep on Leg A before I send the DTMF to
>> make sure i don't send it too early **
>>
>> The problem is that the recognized DTMF on Leg B is wrong about 30% of the
>> time. For example, if Leg A enters: 22063083, Leg B will get the DTMF digits
>> 222063083. This is an example of duplication, but I have also experienced
>> missing DTMF codes (and an occasional wrong code completely)
>>
>> I have messed with a bunch of DTMF settings in hopes of fixing this issue,
>> but I cannot seem to find something that is reliable 100% of the time.
>>
>> _____________________________
>>
>> Here are the DTMF settings I have looked at / messed with. I've tried
>> various values for the dtmf-duration in the config (and in the send_dtmf
>> command above)
>>
>>     <!-- This is in external.xml -->
>>
>>     <param name="dtmf-duration" value="500"/>
>>
>>     <param name="dtmf-type" value="rfc2833"/>
>>
>>     <param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>
>>
>>     <param name="outbound-codec-prefs" value="$${outbound_codec_prefs}"/>
>>
>>     <param name="inbound-codec-negotiation" value="greedy"/>
>>     <!-- This is in vars.xml -->
>>     <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMU"/>
>>     <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU"/>
>> ________________________
>> I have run fs_cli with event logging and the DTMF events that Freeswitch
>> gets do correlate to the wrong value (e.g. the duplication / missing digits
>> is noticable in the Freeswitch events as well).
>> Also, I am not running any dtmf-related applications on the session before
>> I give control to the lua scripts (e.g. not running start_dtmf)
>> Has anyone experienced this type of issue? Or know what I can do to
>> resolve it? My next step was going to be trying this against another
>> provider besides iCall, but I figured I would see if anyone has encountered
>> a similar problem before. Any help is appreciated.
>> Thanks
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>



-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900