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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Security
Page 4-10Facility Restriction Levels and Remote Access
4
After a call is routed to another system, the extension/barrier code FRL has no
effect. The remote system’s default COR FRL takes its place. For the call to go
through, the default COR FRL must be equal to or higher than the remote system
ARS or UDP route FRL, whichever is routing the call next.
Figure 4–1. Facility Restriction Levels Applied to Network Calls
Table 4–3
provides a quick reference to the way that route and extension or
default COR FRLs are applied to calls.
System A
Extension FRL=2:
Caller dials either 9 plus
number or UDP
extension number.
1
System A ARS or UDP
routing selects Route 1.
Extension FRL 2 > Route FRL 1
2
3
System B
Call is routed over
tandem facility to
System B, another
network system.
System B ARS or UDP
routing selects Route 2. Remote
Access COR FRL 4 > Route FRL 3
4
To PSTN or
to another
network system
5
System C
Extension FRL=2:
Caller dials either 9 plus
number or UDP
extension number.
1
System C ARS or UDP
routing selects Route 2.
Extension FRL 1= Route FRL 1
2
3
System D
Call is routed over
tandem facility to
System D, another
network system.
4
System D ARS or UDP routing
selects Route 3. Remote Access
COR FRL 4 < Route FRL 5.
Call is blocked.
STOP