Disallowed Phone Number Lists (#404)
Use this feature to specify telephone numbers that users cannot dial. For example, you may want to prevent calls to a specific telephone number or to categories of numbers, such as international numbers.
You can create up to eight Disallowed Phone Number Lists of up to 10 telephone numbers each. A Disallowed Phone Number can be up to 12 digits long and may include 09, #, *, and (hold)- (the wildcard character, displayed as !).
- After completing this procedure, you must use Disallowed List Assignments (#405) toassign the Disallowed Phone Number Lists to specific extensions.
- To restrict dialing specific telephone numbers, enter the telephone number exactly as you would dial it. For example, to prevent calls to the local number 555-5678, press5555678.
- To restrict dialing numbers in an entire area code, enter that area code exactly as you would dial it (for example, 900, 1900, or 0900, depending on the Toll Call Prefix required). This setting tells the system whether a 0 (for operator-assisted calls) or a 1 (for direct-dial calls) is required when you make toll calls.
Preventing Dialing of Numbers in One Exchange When Toll Prefix Required
- (976) Prevents local calls
- (1!!!976) Prevents direct-dial calls to all area codes
- (0!!!976) Prevents operator-assisted calls to all area codes
- (1976) Prevents direct-dial toll calls in the same area code (needed only when 0or 1 is required for toll calls in the same area code)
- (0976) Prevents operator-assisted toll calls in the same area code (needed onlywhen 0 or 1 is required for toll calls in the same area code)
Preventing Dialing of Numbers in One Exchange When No Toll Prefix Required
- (976) Prevents local calls
- (!0!976) Prevents calls to area codes with 0 as the second digit, such as 203
- (!1!976) Prevents calls to area codes with 1 as the second digit, such as 212
To prevent international calls, enter the international prefix number, 011.
To prevent the use of all star codes, enter * (for touch-tone telephones) and 11 (equivalent to a * on rotary telephones).
To prevent the use of a specific star code (for example, *67 to block Caller IDinformation), enter the * plus the 2- or 3-digit code (for touch-tone telephones) or 11 (equivalent to a * on rotary telephones) plus the 2- or 3-digit code.
For touch-tone telephones, entering *67 prevents the use of *67 to block Caller ID information.
For rotary telephones, entering 1167 prevents the use of 1167 to block Caller ID information.
Allowed Phone Numbers, Emergency Phone Numbers, and Marked System Speed Dial numbers override the Disallowed List.
When a user dials a number that is on a Disallowed List for the users extension, the user hears a reorder tone (fast busy signal) after dialing the part of the number that is stored in the list (for example, an area code).
The entries you must make to permit or restrict toll calls differ depending on the setting for Toll Call Prefix (#402).
If Star Code Dial Delay (#410) is active, after a valid star code is dialed, the system resets the dialing restrictions to check the number beginning with the first digit after the star code.