Instruction manual

Large business communications systems
5-30 Issue 9 May 2003
■ Enter up to 10 barrier codes (use all seven digits) and assign each a COR
and COS that allow only necessary calls. The COR should be restricted so
that even if a hacker deciphers the barrier code, a valid authorization code
is still needed to make a call.
NOTE:
Use the Remote Access feature only on an as-needed basis, and
assign a unique COR to each barrier code. Change the barrier codes
periodically. See ‘‘Remote access barrier code aging/access limits
(DEFINITY G3V3 and Later)’’ on page 5-67.
■ When assigning authorization codes used only to upgrade FRLs, use an
outward-restricted COR with the appropriate FRL. Use
change
authorization-code
<code> to display the Authorization Code-COR
Mapping screen.
NOTE:
Be sure to remove the authorization code whenever an authorized
user leaves the company or no longer needs the Remote Access
feature.
■ Consider using a special partition group for the remote access COR, and
then administer the AAR/ARS tables only for those external locations you
allow remote access users to call. Use
change cor to specify either the
Time-of-Day routing or partition group. Use
change ars analysis partition
to define the appropriate partition group.
■ Monitor authorization code usage with CDR. See ‘‘Call detail
recording/station message detail recording’’ on page 5-53 for further
details.
For DEFINITY G2 and System 85:
■ Use PROC010 WORD1-4 to set COS 31 for remote access.
■ Use PROC285 WORD1 FIELD1 to require a barrier code for remote
access.
NOTE:
As an alternative, you can require an authorization code. However,
since only one code can be used to gain access to remote access,
more protection is provided when you require a barrier code to enter
remote access and then an authorization code to dial out of the
system.
■ Use PROC350 WORD2 FIELD1 = 26 to assign an access code that allows
you to change the barrier code using the attendant console.
■ When authorization codes are assigned, use PROC282 WORD1 FIELD2
to administer the lowest FRL you can.