Technical information

Large Business Communications Systems
4-18 Issue 7 June 2001
Alternate Facility Restriction Levels
For DEFINITY G2, G3r, and System 85, this tool is used with or without
authorization codes to replace originating FRL values (the COS FRL versus the
AAR/ARS/WCR pattern preference FRL) with an alternate set of values. This
allows FRLs to be set to a lower value outside of normal business hours so more
restrictions are placed on after-hours calling.
NOTE:
A button is assigned to the attendant console to activate alternate FRLs.
Toll Analysis (G3 only)
For DEFINITY ECS and DEFINITY G3, the Toll Analysis screen allows you to
specify the toll calls you want to assign to a restricted call list (that is, disallowed),
such as 900 numbers, or to an unrestricted (that is, allowed) call list, such as an
out-of-area number to a supplier. Call lists can be specified for CO/FX/WATS,
TAC, and ARS calls, but not for tie TAC or AAR calls.
Free Call List
For DEFINITY G2 and System 85, you can identify up to ten 3-digit telephone
numbers that can be called on otherwise-toll-restricted ports. This list allows toll
restricted phones to call emergency numbers, such as 911. This option can only
be used with TAC calls, not AAR/ARS calls.
NOTE:
This feature should be used only when CO trunks are obtained using TACs.
The preferred arrangement is always to use ARS/WCR.
AAR/ARS Analysis
ARS routing allows calls to be routed based on the number dialed and the routing
plan in effect. The routing is normally to the lowest-cost facility. Different Time of
Day plans can be implemented to allow or prohibit calling at certain times.
NOTE:
Never route public network calls (leading digit = 0 or 1) via AAR analysis;
always cross over to ARS. (This happens automatically in G2 and
System 85 with ETN.)
Some long-distance area codes may start with the same digits as your local
exchanges. Be cautious when blocking access to those long-distance area codes,
so that access to required local exchanges is not simultaneously blocked. Since
COR/COS-to-COR/COS restrictions do not apply to AAR/ARS trunks, use FRLs
to limit the calling area [see ‘‘Facility Restriction Level (FRL)’’ on page 4-17 for
further information].