Using ARS to restrict outgoing calls

Last Updated : Oct 07, 2026 |
Prolog information
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Keywords:
With ARS, you can block outgoing calls to specific dialed strings. For example, you can restrict users from making international calls to countries where you do not do business, or in the U.S. you can restrict access to 900 and 976 pay-per-call numbers.
Other:
To prevent toll fraud, deny calls to countries where you do not do business. The following countries are currently concerns for fraudulent calling.
List of country codes for fraudulent calling
country
code
country
code
Colombia
57
Pakistan
92
Ivory Coast
225
Peru
51
Mali
23
Senegal
221
Nigeria
234
Yemen
967
To prevent callers from placing calls to Colombia (57):
  1. Type change ars analysis 01157.
  2. Press Enter.
    1. Enter 011 (international access)
    2. Enter the country code (57)
    STEP RESULT:
    The system displays the ARS Digit Analysis Table screen.
  3. Move to a blank Dialed String field.
    ADDITIONAL INFORMATION:
    Skip to Step 6 to deny calls to this dialed string
    STEP RESULT:
    If the dialed string is already defined in your system, the system displays the cursor in the appropriate Dialed String field.
  4. Enter 01157 in the Dialed String field.
  5. Enter 10 in the Total Min and 23 in Total Max fields.
  6. Enter deny (denied) in the Route Pattern field.
  7. Enter intl in the Call Type field.
  8. Press Enter to save your changes.
Related links
Call routing modification