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The customer must now determine the number of area codes and exchanges for
which each line pool should be used. After finding the following Information, he or
she writes it in the “Number of Area Codes or Exchanges for which Line Pool is Used”
column:
— Pool 890 serves area code 413 (toll dialing).
— Pool 891 serves 16 area codes in its region (toll dialing).
— Pool 9 serves all the area codes in the U.S. (toll dialing).
— Pool 890 serves approximately 500 exchanges in the 617 area code (local
dialing).
— Pool 9 serves 19 exchanges in the local calling area (local dialing).
The information in the ARS Worksheet allows the customer to complete his or her
default tables. The customer turns to the Form for Automatic Route Selection Tables
page (found with the instructions in this Planning Guide) that contains Tables 8 and
9. Looking at his or her completed worksheet, the customer decides that the local
lines (pool 9) handle the greatest amount of 1 + area code (toll) dialing since they
serve all area codes in the United States. He or she enters 9 on the first line in the
Pool column of Table 8, the Default Toll Table. Next the customer decides that line
pool 890 serves the greatest number of exchanges using 7-digit or 1 + 7-digit (local)
dialing. Thus, he or she enters 890 on the first line of the Pool column of Table 9, the
Default Local Table. The system administrator will be the person who decides the
preferred way of placing calls in this company’s business. The preferred way will be
based on the administrator’s decisions of how calls are routed by the system.
In summary, as a result of following the steps indicated, this Massachusetts
customer’s ARS default tables and line pools are set up as follows:
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The default toll table contains the local lines.
The default local table contains the in-state (Band 0) WATS lines for area code
617.
Line Pool 890 is used to route calls to the 413 area code and its exchanges over
the in-state (Band 0) WATS lines.
Line Pool 9 is used to route calls to 19 local exchanges over the local lines.
Line Pool 891 is used to route calls to the 16 area codes that are served by the
regional (Band 1) WATS lines.
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