AT&T MERLIN LEGEND System Reference Manual page 94

Features
Mode Differences
Considerations
ARS can be used only on systems that operate in Hybrid/PBX mode with trunk
pools.
ARS users must dial a dial-out code (usually 9) to gain access to an outside
trunk.
The factory setting for the ARS dial-out code is 9.
Once a user has dialed the ARS dial-out code, he or she will hear beeps
instead of tones as the rest of the number is dialed.
A 1 must be dialed before any 10-digit toll call, even if the Iocal telephone
company does not require it.
ARS restrictions (FRLs) operate independently of dial access to pool
restrictions, providing greater flexibility in assigning the type of usage a
telephone is allowed.
A system can have up to 16 fully programmable ARS routing patterns. Each
pattern can contain up to 12 routes (6 per subpattern).
The wildcard character (Pause) cannot be used in system programming to
enter area code and/or exchanges in ARS tables.
Calls made to the equal access code (10xxx) are always routed over the
main pool.
Users who are restricted from using a particular ARS route will hear a high-
low error tone indicating the call cannot be completed.
Users can press # after dialing a 1 + 7-digit number to avoid a timeout
delay—the delay between the time the last digit is dialed and the time the
system recognizes that there are no more digits coming.
When ARS is used on rotary-dial trunks, the timeout delay is 24 seconds
when zero to two digits are dialed (this includes dialing 00 for the toll
operator), 10 seconds when three to six digits are dialed (this includes
dialing 010 for the overseas operator), and 5 seconds when more than six
digits are dialed or if the only digit dialed is a zero.
The factory setting for FRLs for routes and telephones is 3.
From 0 to 20 digits can be added by ARS to numbers dialed by the user. The
factory setting is 0.
From 0 to 11 digits can be absorbed, starting with the first digits dialed by
the user. The factory setting is 0.
Automatic Route Selection 2-45