AT&T MERLIN LEGEND Data Manual page 64

Planning
Ringing Options
ARS Facility Restriction
Level
See "Automatic Route Selection" in
Chapter 4 of PBX System Planning for
additional information on ARS planning.
3-20
Assigning Features to Data Stations
For modems assigned to a digital-to-analog modem pool, set the ringing option
for the line buttons to "no ring." This prevents the modem from answering calls
placed in error to the wrong side of the modem pool (the side away from the
data hunt group or extension assigned to the modem in an analog-to-digital
modem pool or to the ISDN 7500B Data Module in a digital-to-analog modem
pool).
Planning Form Instructions
On the "Button Diagram" section of Data Form 2a or 2b for each data
station:
For each outside line. write "No Ring" on the line provided on the left side of
the button.
Use these instructions only if the system is operating in the Hybrid/PBX
mode.
If your PBX system uses Automatic Route Selection (ARS) for data calls, you can
assign a Facility Restriction Level (FRL) to each data station. This value (from
0 to 6) corresponds to the FRL assigned to each route and is used to restrict
data users from access to specific routes. Before restricting a data station,
review the values assigned to each route.
To restrict a data station from specific routes, assign an FRL value lower than
the route's lowest value. (Values equal to or greater than the route's values allow
data station users to access those routes.) A value of 0 is the most restrictive,
and a value of 6 is the least restrictive. The factory setting is 3.
For example, to give an analog data station unlimited use of any ARS route,
assign a value of 6. If you have digital data stations, assign a value of 0 to
prevent users from inadvertently using ARS to select an analog line for outside
data calls.
Planning Form Instructions
Locate System Form 9b, Automatic Route Selection Table and System
Form 9c, ARS Default and Special Numbers Table.
1. Review the values assigned to the routs.
Use the "Optional Features" section of Data Form 2a or 2b for each data
station to record your decisions about Facility Restriction Level.
2. Next to the "ARS Facility Restriction Level" heading, write the value (0 to 6)
for the ARS Facility Restriction level you want to assign to each data
station.
Check "3" to keep the factory setting.