I am getting a some new cubes ready and during testing for dtmf I noticed the inbound call leg from sip itsp was always Inband and toward the cloud pbx (sip) was rtp-nte as configured.
Both inbound and outbound dial peers were configured with dtmf-relay rtp-nte.
While testing IVR I could not see any digits at all and IVR would not work.
After I added the LTI configuration:
dspfarm profile 1 transcode
codec g711ulaw
maximum sessions 48
associate application CUBE
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Now IVR works.
Questions, is there a better way than LTI to get dtmf to work?
Is the transcoder only invoked when it is needed?
I expect to have approx 400 calls during peak time so am wondering if during the call the transcoder is used and then released?
Thanks