Hello experts,

H.323 v2 section 6.8.2.1 says, "Transmitters shall limit the content of their transmitted information to that which the receiver has indicated it is capable of receiving." On the other hand, H.245 v3 section 7.12.6 says, "Endpoints shall use the alphanumeric indication to convey DTMF user input if the other endpoint has not indicated the ability to receive DTMF using UserInputCapability."

These two statements seem to be in conflict since H.245 v3 seems to be saying that the endpoint is required to send alphanumeric user input regardless of whether the remote endpoint has indicated its ability to receive input in that format. The only ways I can see to reconcile these two statements are to assume either:

o Every endpoint is required to indicate capability of receiving alphanumeric user input (not likely), or --

o Every endpoint is assumed to have the capability to accept alphanumeric user input; i.e., each endpoint *implicitly* indicates that it has this capability. Or --

o I'm interpreting H.245 v3 too strictly. What it really means is that endpoints shall use alphanumeric if the remote endpoint did not indicate DTMF capability but it did indicate alphanumeric capability; otherwise don't send user input at all.

Is any of these interpretations correct? Can someone please clarify the requirements here?

Thanks, Rich ---------------------------------------------------------------------------- Richard K. Bowen Cisco Systems, Inc. rkbowen@cisco.com Research Triangle Park, NC ----------------------------------------------------------------------------