Technical information

DEFINITY ECS, DEFINITY Communications Systems,
System 75, and System 85
Issue 7 June 2001
7-5
Toll Analysis
When an automated attendant system transfers calls to locations outside the
switch, you can use the Toll Analysis form to limit call transfers to the numbers you
identify. You can also specify toll calls to be assigned to a restricted call list so
automated attendant callers cannot dial the numbers on the list. Call lists can be
specified for CO/FX/WATS, TAC, and ARS calls, but not for tie TAC or AAR calls.
Security Measures
The security measures described in this section use switch restrictions on the
automated attendant ports. A disadvantage to this approach is that these
restrictions are transparent to the caller; unaware of restrictions, determined toll
hackers may keep trying to get through.
NOTE:
Even if you do not use the Remote Access feature, you should review the
security measures found in Chapter 4. Some of the security measures
described in that chapter can also be used to help secure your automated
attendant system.
Limit Transfers to Internal Destinations
You can restrict automated attendant menu options to transfer only to internal
extension numbers or announcements by making the automated attendant ports
outward-restricted.
!
WARNING:
Entering “#” transfers calls to the switch; that is, the transfer feature is
always available in AVP Auto Attendant and appropriate outgoing port
restrictions must be in place to avoid toll fraud.
For DEFINITY ECS, DEFINITY G1, G3, and System 75:
 On the Class of Restriction form, create an outward-restricted COR by
entering
outward in the Calling Party Restriction field.
 Assign the outward-restricted COR to the automated attendant port.
 Assign an FRL of 0 and enter n for all trunk group CORs.
For DEFINITY G2 and System 85:
 Use PROC010 WORD3 FIELD19 to assign outward restriction to the
automated attendant port COS. To secure the port, assign toll, ARS toll,
and Miscellaneous Trunk Group Restrictions, and an FRL of 0.