> 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 is for this reason that Send-N specifies the _minimum_ number of required 
digits, not the exact number.

Ray



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