Lucent Technologies 5 manual Merlin Legend Communications System Release

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997
6 Managing the System
Revising Disallowed Lists	Page 6-73

routing calls. Star codes are provided by the central office (CO) to allow the use of special features (for example, in many areas *70 turns off a call-waiting feature provided by the central office). In Release 3.0 and earlier systems, the star code digits were processed as dialed digits by ARS, Allowed Lists, Disallowed Lists, and calling restrictions. Therefore, the actual called party number was not properly processed when a star code was entered.

Release 3.1 and later systems permit system managers to include star codes in Allowed and Disallowed Lists. If a star code is allowed, the digits following the star code are checked normally by Allowed/Disallowed Lists, calling restrictions, and ARS.

The MERLIN LEGEND Communications System Release 3.1 and later observes these Bellcore standards for star codes:

■Only 2- or 3-digit star codes are recognized. Two-digit star codes must begin with 1, 4, 5, 6, 7, 8 or 9. Three-digit star codes must begin with a 2 or a 3.

■The star code or codes must come at the beginning of the string of digits dialed, not at the end or in the middle. Multiple leading star codes are allowed for dialing, but not in Allowed/Disallowed Lists. For example, *67*705551212 is recognized correctly, but in 5551212*67*705553131 the stars are ignored.

■To prevent rotary phone users from using all star codes, include a separate Disallowed List entry, 11. To disallow specific codes, create separate entries where 11 is substituted for the *, for example, 1167.

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 rotary telephones

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