Technical information

Security Measures
Issue 7 June 2001
4-33
Block International Calling
If your company does not do business overseas, deny everyone the ability to
directly dial international calls; in other words, block calling the international dial
prefix, for example, 011. However, this will impact your company’s ability to reach
the “Telco” operator since 0+ dialing is blocked. This can affect credit card calls,
Collect calls, Third Party Calls, and Special Use (0700+) numbers.
For DEFINITY G1 and System 75:
 Enter change ars fnpa 000 to display the ARS FNPA Table screen.
 Leave the following FNPA fields for international calling blank, or, for older
versions of software, assign them to an unused route pattern (for example,
254) with no trunk assignments.
NOTE:
As a reminder, not all international calls follow this pattern. For example,
Canada uses standard area codes.
ARS Routing Table
Operator 0
Toll Operator 00
International Operator 010
International Direct Dial 011
Toll Operator Direct Dial
International Operator
Assistance
012
Operator Assistance 001
Digits Dialed FNPA Translator Table
011 11
010 10
10xxx011 111
001 4
010n 12
101xxxx010 110
101xxxx01 112