Lucent Technologies 8.2 User Manual

Issue 1

April 2000

Enhancing system security 

312

System security checklist 

6. On the 

Feature Access Code

 screen, Facility Test Calls Access Code, the 

Data Origination Access Code, and the Data Privacy Access Code fields, 
change from the default or remove them.

These codes, when dialed, return system dial tone or direct access to 
outgoing trunking facilities. Transfers to these codes can take place 
via an unsecured vector with “collect digits” steps or an unsecured 
voice mail system.

7. Restrict Call Forwarding Off Net on every class of service.

Refer to 

‘‘Class of Service’’ on page 532

 for more information on Class of 

Service.

You cannot administer loop-start trunks if Call Forwarding Off Net is 
required.

8. If loop start trunks are administered in the switch and cannot be changed by 

the Local Exchange Company, block all class of service from forwarding 
calls off-net. In the Class of Service screen, Restriction Call Fwd-Off Net 
field, set to 

 for the 16 (0-15) COS numbers.

Refer to 

‘‘Class of Service’’ on page 532

 for more information.

If a station is call forwarded off-net and an incoming call to the 
extension establishes using a loop-start trunk, incorrect disconnect 
supervision can occur at the Local Exchange Central Office when the 
call terminates. This gives the caller recall or transfer dial tone to 
establish a fraudulent call.

9. Administer Call Detail Recording on all trunk groups to record both 

incoming and outgoing calls.

Refer to 

‘‘Collecting information about calls’’ on page 439

 for more 

information.

10. On the 

‘‘Route Pattern’’ on page 865

, be careful assigning route patterns 

with an FRL of 

; these allow access to outgoing trunking facilities. Lucent 

recommends assigning routes with an FRL of 1 or higher.

An exception might be assigning a route pattern with an FRL of 0 to 
be used for 911 calls so even restricted users may dial this in 
emergencies.