Ray Bellis wrote: >> where even telephone switches (thus, telephone operators) do not have >> any knowledge on how many numbers should be dialed. > > It is for this reason that Send-N specifies the _minimum_ number of > required digits, not the exact number. It contradicts with the following description of the draft: With this information, the application is not required to query the DNS every time a new digit is dialed, but can wait to collect sufficient digits to receive a response. That is, the application can wait to collect sufficient digits to know the _minimum_ number means that the application MUST know the minimum number of digit to make such query, even though E.164 structure often changes. Worse, even if the application knows the _minimum_ number, the application MUST make DNS querys for every digit beyond the _minimum_ number, which means negligibly small number of queries could be saved. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf