Dean Willis wrote:
I think my point has been missed. Why did the device need to indicate
willingness to send 2833 tones? It can't send them unless the other side
has indicated willingness to accept them. And, as pointed out, it
doesn't have to be able to receive them to be able to send them.
There are a (growing) number of ways to transmit DTMF information. A
particular UA that is interested in receiving DTMF needs nail down a way
of doing so. And a UA that is to send DTMF needs to nail down the
way(s?) it will be sending it.
After the initial invite there needs to be some way for the recipient to
decide if a way has been agreed upon. If not, then it still may have the
option of sending an explicit subscription. But it needs to know if that
is required. If nobody every explicitly confirms that they agree to send
DTMF in some agreed upon way then things are messed up.
Paul
_______________________________________________
Sip mailing list https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use [EMAIL PROTECTED] for questions on current sip
Use [EMAIL PROTECTED] for new developments on the application of sip
