[Asterisk-Users] PSTN outgoing DTMF vs. transfer Problem

[Vahan Yerkanian]

Doug Crompton wrote:
> I am using an SPA-3000 3.1.10d
> 
> When I have transfer enabled - 'T' in the dial string I cannot reliably
> send DTMF keys to a bank, voicemail, or other service requiring tones. If
> I disable (remove transfer option) from the dial string all is fine. I
> would like to be able to use features but the ability to have reliable
> DTMF after call completion is more important.

Make sure you're using SIP INFO as the DTMF transport.