Lucent Technologies 555-661-150 manual Facility Restriction Levels Applied to Network Calls

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
4 Security
Facility Restriction Levels and Remote Access	Page 4-10

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.

1

System A
2	3

System B
4	5

Extension FRL=2: Caller dials either 9 plus number or UDP extension number.

System A ARS or UDP routing selects Route 1. Extension FRL 2 > Route

Call is routed over tandem facility to System B, another network system.

FRL 1

To PSTN or

to another

network system

System B ARS or UDP

routing selects Route 2. Remote

Access COR FRL 4 > Route FRL 3

	System C
1	2	3
Extension FRL=2:		Call is routed over
Caller dials either 9 plus		tandem facility to
number or UDP		System D, another
extension number.	System C ARS or UDP	network system.
	routing selects Route 2.
	Extension FRL 1= Route FRL 1

System D

4

STOP

System D ARS or UDP routing

selects Route 3. Remote Access

COR FRL 4 < Route FRL 5.

Call is blocked.

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.