[asterisk-users] Problem with DTMF dialing

[Ian]

Sorry for taking so long to reply,

This email got lost in translation, again.

Ian

Ian said the following on 30-Jan-08 03:57 PM
> Thaks for the speedy reply
>
> Tzafrir Cohen said the following on 30-Jan-08 12:37 PM:
>> On Wed, Jan 30, 2008 at 09:21:31AM +0200, Ian wrote:
>>   
>>> Hi all
>>>
>>> I have a small problem here. I asked this question on another asterisk 
>>> mailing list, but nobody seemed to be able to help me there.
>>>
>>> We are running
>>>
>>>    * Asterisk 1.4.17
>>>    * Libpri 1.4.3
>>>    * Zaptel 1.4.8
>>>
>>> on a 1.6 dual core, 2GB ram and a digium TDM800P wildcard, hardware echo 
>>> cancelation and a quad FXO card.
>>>
>>> We have 4 analog lines, one of which is a Cellphone line for least cost 
>>> routing.
>>>
>>> The  problem I am having is dialing out using DTMF signalling. At the 
>>> moment I am making do with Pulse dialing through the 3 analog lines. I 
>>> can recieve calls on the Cellphone line without any problems, but cant 
>>> dial out through it, as a cellphone cant do pulse dialing. I have run 
>>> "ztmonitor 1 -f gains", where 1 is the zap channel where the cellphone 
>>> is located, while dialing the number 072 031 1294. I then went to 
>>> audacity, on my own pc, and converted the raw file into mp3 format, 
>>>     
>>
>> mp3 is a compressed format, and hence may lose some quality. Generally
>> you should stick with wav. ztmonitor should spit the appropriate sox
>> command to do the conversion. Maybe it would look slightly different in
>> the original format.
>>   
> Ok I tried this everywhich way I could but everytime I came up short 
> of an answer. Meaning I am unable to find the right sox command to get 
> this converted to wav on the same computer, so once again I got it to 
> my pc, and then using my favourite friend, audacity I imported it as a 
> raw format at 8000Hz, and exported it as a wav file this time, 
> available for download from http://www.iancoetzee.za.net/gain.wav. it 
> has the same effect, the numbers I dialed and the feedback I got is 
> two different things.
>>   
>>> which is available for download at 
>>> http://www.iancoetzee.za.net/tone_dial.mp3. After listening to the 
>>> playback I concluded that the DTMF signals being sent is totally wrong.
>>>     
>>
>> Is that the whole tone? It is too short to be a valid DTMF.
>>   
> Yes that was the dial bit, this time I included the whole recording 
> from beginning to end. if you count the tones you get to 10, which is 
> the correct amount for South Africa. Another thing that got me worried 
> is the fact that the last digit has a fair ammount of pause (about the 
> same length of another tone) before it is sent.
>
> If you want I can upload the raw data to my server as well.
>
> Regards
> Ian
>
> -- 
> www.vddi.co.za <http://www.vddi.co.za/>
> I Coetzee
> IT Technician
> Telephone 	: 	012 664 2300
> cellphone 	: 	079 522 6519
> Fax 	: 	012 644 2902
> E-mail 	: 	ian at vddi.co.za
> Skype 	: 	vddb_igcoetzee
>

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