[Asterisk-Users] dtmfmode=auto, but doesn't work

[Kevin P. Fleming]

Aryanto Rachmad wrote:

> I am aware that inband DTMF does not work over G.729 codec. So in this case my provider does not offer RFC2833. I can not do anything about this, can I? Or is there anyway to simulate inband DTMF over any other codecs, but G.711a or G711u?

You are correct, if your provider is using G.729 but does not offer
RFC2833 (or SIP INFO) for DTMF, then you cannot have reliable DTMF
transmission/reception (if at all).