[Asterisk-Users] Cisco 7912G through NAT, problems with tones detection.

[Hermann Wecke]

Diego Mariano Velo wrote:
> Hi, i have a cisco 7912G with SIP firmware, its connect to the asterisk
> through nat. The only problems is in the voice mail....asterisk not
> detect the tones, therefore i cant access to my voice mail extension.

Check the DTMF settings...

http://www.voip-info.org/wiki/view/Asterisk+config+sip.conf

dtmfmode: inband | info | rfc2833