フリー問題

問題文

A user dials a destination one digit at a time, and the numeric dial plan that has been provisioned still leaves room for a longer match to turn up. What has to happen before the cluster settles on a route, and what does the design guidance say about the default of the mechanism that is involved?

選択肢

1. The cluster has to see an end-of-dial digit from the user, and the guidance leaves the default of 15000 ms alone and treats 5000 as the floor that any dialed string in the plan must clear.
2. The inter-digit timeout has to expire first, and the guidance calls the default of 15000 ms too long and provisions 5000 in its place for every cluster of that build.
3. The inter-digit timeout has to expire first, and the guidance leaves the default of 15000 ms alone and warns against any value as low as 5000, since a shorter wait cuts off every match that is longer.
4. The cluster has to see an end-of-dial digit from the user, and the guidance calls the default of 15000 ms too long and puts 5000 in its place wherever any pattern in the plan is of a fixed length.