From: [EMAIL PROTECTED] In case of DTMF digits, a single RFC 4733 packet carries a single DTMF digit in my understanding. Triple redundancy is the basic means to target RTP packet losses, i.e. the receiver must receive at least one out of three.
Be careful -- An RFC 4733 packet carries state information about a DTMF sound, either that the sound is on (and if so, how long it has been on) or that the sound has stopped. E.g., it is up to the recipient to decode this information into DTMF digits, and in some cases, to distinguish how long the digit was. Multiple packets are used to defeat packet loss, but also to allow transmitting the initiation of the digit before the finish of the digit has been seen, and to allow the transmission of the real length of the digit. Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
