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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Security
Page 4-9Facility Restriction Levels and Remote Access
4
Table 4–2. Recommended Settings for Tie and Non-Tie Default COR and Callback
How Facility Restrictions
Levels Work in a Network 4
The diagram in Figure 4–1 illustrates how FRLs function in a network. An
extension’s FRL is compared to the local ARS route FRL or the local dial plan
route FRL, whichever is used for the call. If the extension user has dialed a
Remote Access code included in the non-local dial plan, the user’s barrier code
FRL is compared to the UDP or ARS route FRL before the call leaves the calling
system (barrier codes must be required in the default COR setting on the called
system for the applicable type or types of tandem facilities). If the extension or
barrier code FRL is equal to or greater than the route FRL, the call goes through.
Setting Name
Recommended
Setting Description
Barrier Code
Requirement
On Requires barrier code entry for remote access calls on DID,
PRI dial plan-routed, dedicated or shared remote access, or
tandem facilities. Remote access calls will arrive over
tandem trunks if the Remote Access code is included in the
non-local dial plan of the calling system. Ignored for UDP
calls across the network.
Calling
restrictions
Unrestricted Allows routing across the network. Toll restrictions can still
be applied to remote access calls on DID or PRI dial plan-
routed facilities, as long as barrier codes are required.
Facility
Restriction
Level
Higher than 1 For a call to be routed to the PSTN or to an extension on
another system in the network, the FRL assigned here must
be equal to or greater than the UDP or ARS route FRL.
Allowed List None Not Applicable
Disallowed
List
Disallowed List 7 Prohibits calls to the numbers in the list. Modify as needed.
Other lists can be assigned to barrier codes and default
CORs.
Automatic
Callback
No
recommendation
Applies to all remote access calls that arrive on PSTN
trunks but does not apply to UDP- and ARS-routed network
calls. For extensions making intersystem or ARS calls,
Callback can be turned on or off at the extension.