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Forums › Spark New Zealand › DTMF Tones between two telecom xt mobiles


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Wannabe Geek
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Topic # 55355 31-Dec-2009 09:39
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Hi,
We have setup a GSM gateway here at work and when any of our team rings in from there xt mobile we cant use DTMF tones, if we ring in from anywhere else (Voda Telecom landline, telstra, 2talk ) we can use DTMF tones. 

Does anyone know if Telecom are blocking DTMF tones between two XT mobiles??

I have tested 2 Voda sims and it works fine

Thanks for any help

Nick

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Uber Geek
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Biddle Corp
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  Reply # 286230 31-Dec-2009 10:00
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This is a known issue with the XT network and was discussed a month or two ago on here. Telecom aren't purposely blocking XT<->XT DTMF tones, they just simply don't work due to an issue. Unlike regular PSTN lines DTMF tones are not carried inband (within the audio stream) in mobiles due to the compressd voice codecs.

There is no timeframe for a resolution at this stage but it is known about.

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  Reply # 286231 31-Dec-2009 10:01
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have a search, there is a thread somewhere about this (I think)



7 posts

Wannabe Geek
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  Reply # 286234 31-Dec-2009 10:05
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Thanks for all your help ill have a search around see what i can find

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  Reply # 286238 31-Dec-2009 10:17
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Earlier thread is here

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