Here's one example:  You have a dedicated long distance route at your company.  You also have a local Telco trunk route.  The cost to call Area Code 312 is cheaper over the long distance route.  If that long distance trunk route fails or becomes busy, you would like some callers to fail over to the local Telco route.

With BARS, you can program the system so the long distance route is preferred for all calls to NPA 312, but during a failure or all trunks busy condition, the most important users (or any users you specify) will automatically route over the local Telco lines.  You assign NPAs to Route Lists.  Route Lists contain the trunk routes

The column to your right is a route list printed out.

The first BARS101: Call Tour and the BARS LDs

The RLI is the List of Trunk Routes an NPA, NXX or SPN can call out on.

In the example below, you can also refer to THIS

RLI 4 - The LIST in the example

ENTR 0 The first entry in the LIST
LTER NO
ROUT 15  The Long Distance route in the example
TOD 0 ON 1 ON 2 ON 3 ON
    4 ON 5 ON 6 ON 7 ON
CNV NO
EXP NO
FRL 3
DMI 0
FCI 0
FSNI 0
OHQ YES
CBQ YES


ENTR 1 The second entry in the LIST
LTER NO
ROUT 10  The local Telco route in the example
TOD 0 ON 1 ON 2 ON 3 ON
    4 ON 5 ON 6 ON 7 ON
CNV NO
EXP YES
FRL 3
DMI 12
FCI 0
FSNI 0
OHQ YES
CBQ YES
ISET 2
MFRL 2