Instruction manual

Calling Restrictions
Facility Access Restriction:
Any station may be denied dial access to the local CO and/or to all other
group). A station so restricted may only dial access those facilities via
Selection (ARS) feature.
pooled facilities (as a
the Automatic Route
In addition, each trunk and Virtual Facility can be administered to allow or restrict dial access. If dial
access is restricted, the trunk or Virtual Facility may only be dial accessed via ARS.
ARS Restriction:
Special restrictions on each station may be imposed when the call is routed by the ARS feature.
Facility Restriction Levels (FRLs) are used to restrict access to trunk groups. A FRL is a single digit
(0, 1, 2, 3). A terminal assigned a FRL of 0 has the least privileges, a terminal assigned a FRL of 3,
the most. A FRL is also assigned to each route in each ARS routing pattern. The terminal’s FRL
must be equal to or greater than the route’s FRL in order to use that facility.
Considerations
Restrictions are used whenever it is necessary to restrict certain users from accessing designated
facilities. A typical application is to deny most stations dial access to all trunk groups. This forces
callers to use the ARS feature, which should result in reduced toll charges.
Interactions
The following features interact with Calling Restrictions:
Automatic Route Selection: The use of the ARS feature will not allow users to avoid restrictions.
Outward Restriction and Toll Restriction, when administered, can prevent calls originating at
associated voice terminals from routing via ARS. Facility access restrictions, however, are
circumvented.
Bridging of System Access Buttons: If a station goes off-hook on a Bridged Access (BA) button
and dials a number, the call is completed according to the bridging station’s restrictions and
characteristics, not those of the principal station’s.
Two bridging stations or a bridging station and its principal station can attempt to originate a call on
their corresponding System Access (SA) and BA buttons at the same time. This call is completed
according to the calling restrictions of the station that went off-hook first.
Callback Queuing: Restrictions in effect at the time a call is originated also apply to the retry
attempt.
Forwarding: When Forwarding to an outside station is initiated, the system will ensure that the
forwarding does not violate any calling restrictions applied to the forwarding station.
November 1995
2-89