Disallowed Lists - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

System Features

Disallowed Lists

This section contains instructions for using Disallowed Lists to prevent people
from making calls to specific numbers, whether or not restrictions are specified
for an extension. You can use this feature instead of restricting telephones
totally from making toll or local calls.
!
SECURITY ALERT:
Be sure to review the toll fraud information with regard to Disallowed Lists
in Appendix A, "Customer Support Information."
Use a "wild card" character to indicate that you want calls to an exchange
restricted in every area code. During system programming, a Pause (entered
using the Hold button) indicates a wild card character; therefore, use the letter
"p" to indicate on the form that a wild card character should be programmed.
You can design up to 8 lists with a maximum of 10 numbers. Each number can
have up to 11 digits, for example, a leading 1 (if a toll-call prefix is required for
dialing) followed by the area code and telephone number. Star codes (such as
*67) may also be included in the list to block users from accessing special
services offered by the Central Office. Once you have designed the lists, decide
which telephones to restrict. You can assign up to eight lists for each telephone.
Disallowed List #7 is the system default list and includes the numbers most
frequently associated with fraud. The table below lists the default entries for
Disallowed List #7.
Table 4–2. Disallowed List #7 Default Entries
NOTE:
Users cannot dial a number on an Allowed List if it matches a number on a
Disallowed List assigned to the telephone.
4–40
Features
0
10
11
1809
1700
1900
976
1ppp976