Lucent Technologies 5 manual Allowed/Disallowed Lists

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997

4Features and Applications

Features Page 4-43

In Release 3.1 and later systems in Hybrid/PBX mode, remote access users are automatically restricted from making outside calls using the system. See ‘Facility‘ Restriction Levels (FRLs)’’ on page 4-44 for more information.

Allowed/Disallowed Lists

Apply to: Extensions and remote access barrier codes

Use Allowed Lists to permit restricted users to make some calls. (Tagged System Speed Dial codes or their corresponding marked Directory listings can also be used to make certain calls.) Use Disallowed Lists to provide some protection from toll abuse when no other restrictions are applied. Allowed/Disallowed Lists can be used with any other calling restrictions. This feature provides flexibility by allowing users whose phones are restricted to call specific numbers related to their business activities, as well as emergency numbers.

Beginning with Release 3.1, star codes can be included in Allowed and Disallowed Lists (in Releases 3.0 and earlier, the system treats star codes no differently from other dialed digits, and you cannot include a star code in an Allowed/Disallowed List; this can affect calling restrictions and ARS routing). Furthermore, they are ignored by the Automatic Route Selection feature when routing calls. Star codes, typically dialed before an outgoing call, provide special services from the CO. For example, in many areas a telephone user can dial *67 before a telephone number to disable central office-supplied caller identification at the receiving party’s telephone. To allow or disallow use of this star code preceding a call, you include *67 in an Allowed or Disallowed List. For each star code, a separate list entry is required. For more information about star codes in

Allowed/Disallowed Lists, see Chapter 6, ‘Managing‘ the System’’.

Beginning with Release 3.1, a default Disallowed List (number 7) is provided with the system. This Disallowed List is automatically assigned to both generic and integrated VMI ports used by voice messaging systems. It includes the following entries, which are often used for toll fraud:

■0, to prevent international calls

■10, to prevent access to long-distance service providers

■1809, to prevent unauthorized international calls routed through the Dominican Republic

■1700, to prevent unauthorized toll calls with a “700” area code

■1900, to prevent unauthorized toll calls with a “900” area code

■976, to prevent local toll calls to numbers with “976” local access codes

■1www976, where “w” stands for a wildcard entry, to prevent long-distance calls to numbers with “976” local access codes

■11, to prevent the use of star codes at single-line telephones

■*, to prevent the use of star codes at multiline telephones