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SIP DTMF

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DeanStaunton

Technical User
Sep 23, 2015
14
GB
Hi Has anybody had any problem with R11.1 IP 500, J159 & J169 DTMF on sip trunks. The sip provide can see no DTMF (RFC2833).
If you use the J159 & J169 internally to the voicemail pro it work fine.
I have an SE on the same version and that works with both phones internally and externally with the same sip provider

 
Set the Only supported codec by your provider in the line and remove any other codecs. Check mark codec lock down and uncheck direct media.
 
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