Disallowed & Allowed Telephone Numbers
With Disallowed Telephone Numbers you can prevent users who can normally make outgoing calls from dialing specific telephone numbers or categories of telephone numbers (e.g., calls to 976 exchanges for
To prevent or allow calls to specific area codes (for example, calls to the 900 area code) requires programming 2 versions of the area code: 0900 and 1900. Follow the examples
Conversely, Allowed Telephone Numbers are exceptions to dialing restrictions.
EXAMPLE DISALLOWED LISTS
DIALING “0” OR “1” FOR LONG DISTANCE
IS REQUIRED | IS NOT REQUIRED |
For example, you might disallow (prevent) the dialing of 976 telephone numbers, but allow dialing of
By combining Dialing Restrictions and Disallowed Telephone Numbers with selected exceptions (via Allowed Telephone Numbers, Marked Speed Dial Numbers, and a list of Emergency Telephone Numbers you will specify later), you can control outgoing call traffic and associated costs without placing unreasonable constraints on your staff.
Prevent calls to
●976 Exchanges
●900 Area Code
●011 Foreign Countries
✱
These entries are necessary only in states where dialing “0” or “1” is required for toll calls within the state (example: in NJ, which has two area codes, a person in 201 who wants to call 609 must dial a “1” first).
Item | Telephone Number | |
01 | 976 |
|
02 ✱ | 0976 |
|
03 ✱ | 1976 |
|
04 | 0!1!976 |
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05 | 0!0!976 |
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06 | 1!1!976 |
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07 | 1!0!976 |
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08 | 0900 |
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091900
10011
Item | Telephone Number |
01 | 976 |
|
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02 | !0!976 |
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03 | !1!976 |
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04 | 900 |
05011
06
07
08
09
10
Form C Instructions (top):
Use form C to create lists of disallowed and allowed telephone numbers, and to assign the lists to extensions.
1. Create lists. You can create up to 4 lists each of Disallowed and Allowed | |
Telephone Numbers. | |
■ | In the space under the List number, write in a description, if any, you |
| want to use to identify the list (for example, “Suppliers”). |
■ | Under “Telephone Number” write the area codes, local exchanges, or |
2 . Assign Lists. In the “Extension Assignments” box, assign the lists to the extensions in your system, in any combination, by placing an “X” in the appropriate columns. For example, you could assign List 1 and 2 to Ext. 11, but only List 1 to Ext. 12.
Emergency Telephone Numbers
You can create a list of up to 10 emergency numbers that can be dialed at any time by any extension with access to an outside line. Emergency numbers override all other dialing restrictions, and can even be dialed when Night Service is on.
complete telephone numbers appropriate for that list (maximum 12 digits |
per telephone number). Write complete telephone numbers exactly as |
they would be dialed out of your system, including area codes with |
leading 0's or 1's. |
NOTE: To prevent or allow certain categories of telephone numbers |
requires programming more than one version of the telephone number |
into the system. The number of versions depends on whether or not you |
need to dial a leading digit for long distance. For example, if you normally |
must dial a 0 or 1 for long distance, to prevent both local and long- |
distance calls to 976 exchanges requires programming 7 versions of the |
number. See the example on the top of the next column (left box). |
(The ! is a wildcard character that matches any single digit dialed.) |
Form C Instructions (bottom):
List up to 10 emergency numbers on the bottom of form C. See the example to the right of these instructions.
NOTE: There are a variety of factors that influence the effectiveness of call restrictions. Avoid putting 800 numbers in your Emergency List.
If you need to allow restricted users to access 800 numbers, put those numbers in an Allowed List instead.
EXAMPLE EMERGENCY LIST
Item | Telephone Number |
01911
02611 (local phone company service)
03
04
05