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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 pre-recorded messages,
such as horoscopes, and 900 area code “chat lines”).
Conversely, Allowed Telephone Numbers are exceptions to dialing restrictions.
For example, you might disallow (prevent) the dialing of 976 telephone numbers,
but allow dialing of 976-1212 for weather reports. Or, you can use Allowed
Telephone Numbers to permit people at extensions with dialing restrictions to
dial certain telephone numbers, local exchanges, or area codes. For example,
you may want people at normally toll-restricted extensions to be able to call
specific customers or suppliers.
Item
Telephone Number
Item
01
976
02
✱
03
✱
976
0976
!0!976
1976
03
04
011
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.
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
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.)
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 below—the left box if you dial a “0” or “1”
for long distance, or the right box if you don't.
EXAMPLE DISALLOWED
LISTS
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).
DIALING “0” OR “1” FOR LONG DISTANCE
IS REQUIRED
IS NOT REQUIRED
04
0!1!976
05
0!0!976
06
1!1!976
07
1!0!976
08
0900
09
1900
10
011
Telephone Number
01
02
!1!976
900
05
06
07
08
09
10
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.
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
01
911
02
611 (local phone company service)
03
555-2345 (Boss's home)
04
555-4567 (auto club)
05
555-1357 (company doctor)