電訊茶室» VoIP 研究室 » Asterisk » DTMF for different devices

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發表於 2011-10-16 17:14 | 只看該作者

DTMF for different devices

I have made some trials recently and found some clients can do proper DTMF but some do not

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發表於 2011-10-16 18:29 | 只看該作者

If we have the spectrum analysis then I can tell you whether your DTMF dialler is complied with the ITU regulation or not.

YH

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發表於 2011-10-16 19:39 | 只看該作者

回復 2# 角色

I have iphone, nokia and handset. Different settings in asterisk can have different results

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發表於 2011-10-16 23:04 | 只看該作者

I can tell from time to time different devices behave differently. I am trying yo make these devices DTMF work with my asterisk. Some times, too fast the input can also be a problem

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發表於 2011-10-17 17:50 | 只看該作者

本帖最後由 bubblestar 於 2011-10-17 17:51 編輯

In both telephone card and ATA, we can set "relaxdtmf=yes" or "strict dtmf = no" to ease this phenomenon.