Enter the last extensions for the ranges of telephone numbers used
on the local system.
The length of the start and end extensions must agree with the number
shown in the Extension Length field. Leading
zeros might be needed to conform to this requirement. The end extension
must be equal to or greater than the start extension.
Up to 10 different ranges can be specified. AMIS address ranges and
message delivery address ranges must be unique; they cannot overlap
with other AMIS analog networking and/or message delivery address
ranges.