Technical information

Security Measures
Issue 7 June 2001
4-35
For DEFINITY ECS and DEFINITY G3:
 Enter change ars analysis to display the ARS Analysis screen.
 Specify the telephone numbers in the Dial String field that you do not want
dialed by entering
blank in the routing pattern or routing to a pattern that
contains a high FRL.
 Disable TAC/DAC dialing (see ‘‘Disable Direct Access to Trunks’’ on page
4-38).
 To block calls to countries in the North American dial plan, enter the area
code plus any required prefix digit (0 and 1). Be sure to define possible
variations of the number. For example, to block calls to the 809 area code,
enter
1809 and 0809 with 11 in both the Min and Max fields. If you do not
include a prefix digit, enter
10 in both the Min and Max fields.
For DEFINITY G2 and System 85:
 For DEFINITY G2.1 and System 85 R2V4, assign numbers to the
Unauthorized Call Control feature using PROC313 WORD1. The FRL for
unauthorized call control is assigned in PROC275 WORD3 FIELD10. It
should be assigned FRL 7.
 For DEFINITY G2.2, use digit conversion to reroute abused telephone
numbers to an attendant or to VNI 0. Enter
PROC314 WORD1.
NOTE:
Make sure Remote Access barrier codes have properly assigned CORs with
FRLs set low to restrict access to the network, and use COR-to-COR
restrictions to prevent access to trunk groups.
Select Authorization Code Time-Out to Attendant
For DEFINITY ECS, DEFINITY G1, G3, and System 75, you can send calls to an
attendant if the caller fails to enter a required authorization code within 10
seconds. For DEFINITY G2 and System 85, you can route calls to an attendant
when callers fail to enter a required telephone number or authorization code within
10 seconds.
For all switches:
 Select the Timeout to Attendant feature when you administer authorization
codes.
For DEFINITY ECS, DEFINITY G1, G3, and System 75:
 Use the System-Parameters screen to request authorization code timeout.