Ray Bellis wrote: > (http://www.ietf.org/internet-drafts/draft-iab-dns-applications-00.txt) > > Send-N is not only intended for open number plans, it's intended > for use in _any_ plan with variable length telephone numbers. Such a mechanism simply does not work when: <draft-iab-dns-applications-00> In these plans, a telephone switch ordinarily cannot anticipate when a dialed number is complete, as only the terminating customer premise equipment (typically a private branch exchange) knows how long a telephone number needs to be. where even telephone switches (thus, telephone operators) do not have any knowledge on how many numbers should be dialed. > It came out of the proposed specifications for the UK local number > portability database, where E.164 numbers vary from 8 to 12 digits > in length. If the number portability database operated by telephone operators can eve exist, it is impossible that CPEs operated by subscribers determine the length of telephone numbers. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf