I am having a problem with SendDTMF() – 50% of time it did not succeed.
I suspect it is not sending clear DTMF tones to the IVR.
Sometime digit 3 and 2 work, and failed to do digit 1.
Sometime digit 3 work and failed to do number 2.
Sometime all went through fine.
dtmfmode=rfc2833 are set in the sip.conf file
How do I debug to see what went wrong and how to fix?
Installed on VPS (XEN, CentOS 5.x, 768 MB Ram, 1000 GB B/W – Located in UK)
VOIP Provider in UK.