Enter the complete telephone number that other systems
will use to contact this machine in the
CALLBACK NUMBERS:
fields. The callback number has three parts and must be no more than
15 digits.
Under Country, enter the Country Code of the callback number, from
0 to 4 digits. A Country Code of 0 is typically used to indicate that
the callback number is a private network number. This field can be
left blank.
Under Area/Trunk, enter the area code or trunk ID of the callback
number, from 0 to 7 digits.
Under Local Number, enter the local telephone number of the callback
number.