Attended transfer does not work on hardware phone

core

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Nov 11, 2009
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#1
Hello,

I'm using Elastix 1.6-12 mainly with softphones (X-Lite). We use attended transfer functionality (*2) and it works great.

But we have 2 hardware phones - produced by Siemens and attended transfer is not working at all using them. I also tried it on the Grandstream BudgeTone GXP-200 which I had borrowed and it also didn't work.

It seems that no DTMF tones are recognized using the hardware phones.

What can I check to solve that problem?
 

Patrick_elx

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#2
you have to look at a few things things:

- in the extension tab on the PBX:
what codec are you using for your extensions ?
what dtmfmode settings did you put for your extensions ?

- in the phone itself (on the phone web page or file config):
any forced dtmfmode settings ?
any dial pattern that will intercept the *2 for another build in phone function ?
 

core

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#3
Thank you for your answer.

I found DTMF settings in phone's panel and changed it to rfc2833. Now everything works!
 

Patrick_elx

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#4
great. It can sometimes be tricky as some hardware phones have their own way of doing stuff by default that are not compatible with your pbx settings.
 

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