Avaya Communication Manager Administrator's Manual page 326

Enhancing System Security
System Security Checklist
7
Restrict Call Forwarding Off Net on every class of service.
See Class of Service
NOTE:
You cannot administer loop-start trunks if Call Forwarding Off Net is required.
8
If loop start trunks are administered on Communication Manager 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,
See Class of Service
NOTE:
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.
See Collecting Information About Calls
10
On the Route Pattern
allow access to outgoing trunking facilities. Avaya recommends assigning routes with an FRL of
1 or higher.
NOTE:
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.
Tip:
You can use the
their status.
11
On all trunk group screens, set the
Access Codes, thus bypassing all the ARS call screening functions.
12
On the AAR and ARS Digit Analysis Table
conduct business to den (deny).
13
If you require international calling, on the
use only the 011+ country codes/city codes or specific dial strings.
14
Assign all trunk groups or same trunk group types a unique Class of Restriction. If the trunk group
does not require networking through Communication Manager, administer the Class of
Restriction of the trunk group where the
and all unique Class of Restriction assigned to your outgoing trunk groups are n. See
Restriction
Tip:
You can use the
groups. Then, you can use the
group) to check the COR of each trunk group.
15
For your AUDIX, on the System Appearance screen, set:
326
on page 696 for more information on Class of Service.
Restriction Call Fwd-Off Net
on page 696 for more information.
on page 1125, be careful assigning route patterns with an
list route-pattern print
Dial Access
on page 682 for more information.
list trunk-group print
display trunk-group x
Administrator's Guide for Avaya Communication Manager
field, set to y for the 16 (0-15) COS numbers.
on page 503 for more information.
command to print a copy of your FRLs and check
field to n. If set to y, it allows users to dial Trunk
on page 603, set all dial strings not required to
AAR and ARS Digit Conversion Table
is 0, the
FRL Calling Party Restriction
command to have a printout of all your trunks
command (where x is the trunk
FRL of 0; these
on page 607,
field is outward,
Class of
November 2003