In order to determine if DTMFs would be sent out-of-band or in-band (telephone-event supported or unsupported respectively)
(cherry picked from commit 739b7bd4)
Parent: linphone-sdk!3508 (merged)
In order to determine if DTMFs would be sent out-of-band or in-band (telephone-event supported or unsupported respectively)
(cherry picked from commit 739b7bd4)
Parent: linphone-sdk!3508 (merged)