Instruction manual

Large business communications systems
5-50 Issue 9 May 2003
■ Mark each string and route with an FRL permission value using PROC314
WORD1 FIELD8
, and PROC318 WORD1 FIELD4.
■ Use toll checking capabilities as shown:
— For WCR, use
PROC010 WORD3 FIELD22.
— For toll-free tables, use
PROC319 and PROC318 WORD1 FIELD6.
■ If needed, define more detail in the numbering plan by using PROC314.
Use wildcard digits and variable string lengths with care.
■ Send a # after troublesome call types (0 +, 011 +, etc.). Use PROC321
WORD1 FIELD16.
NOTE:
Use PROC314 to route 0 and 00 calls to an attendant.
Change override restrictions on 3-way
COR check
For G3V2 and later releases, the Restriction Override feature is used with the
3-way COR check on transfer and/or conference calls. The default is
none.
Detecting toll fraud
After you have taken the appropriate security measures, use the monitoring
techniques described in this section to routinely review system activity. Here are
some signals of possible hacker activity:
■ Employees cannot get outside trunks
■ Customers have difficulty getting through to your 800 number
■ Usage is higher than normal
■ Nights and weekends have heavy call volume
■ Attendants report frequent “no one there” or “sorry, wrong number” calls
■ Bill shows calls were made to strange places
NOTE:
If you should suspect toll fraud in your system, you should call the Avaya Toll
Fraud Intervention Hotline, 1-800-643-2353.