AT&T MERLIN LEGEND Release 4.0 Feature Reference page 66

Feature Reference
Absorbed Digits. The number (0 to 11) of user-dialed digits that ARS
absorbs (does not dial out) on this route. Digits are absorbed starting
with the first user-dialed digit after any leading star codes.
System-Prefixed Digits. A string of up to 20 digits (0–9, *, and
Pause) that ARS dials out on this route before dialing any remaining
user-dialed digits but after dialing any user-dialed leading star codes.
ARS allows up to 16 programmable tables, each of which may contain one of
the following types of information:
Area Code Tables. These tables are lists of 3-digit area codes. Area
code tables are useful if just one type of trunk (for example, a regional
WATS trunk) is used for all calls to each area code on the list.
Local Exchange Tables. These tables list 3-digit exchanges within the
local area code. They can be used to route calls over in-state WATS
lines.
6-Digit Tables. If the cost of calls to another area code varies according
to the exchange, this table can be used to route calls on different trunk
pools, depending on both the area code and the exchange.
In the 6-digit tables, an area code is the first entry. The remaining 99
entries are exchanges within the area code. The system scans the first 6
digits of the user-dialed number (area code and exchange) to route the
call.
1 + 7 Tables. In some areas, callers must dial a
call certain exchanges, even though the call is within the local area code.
A 1 + 7 table contains a list of exchanges within the local area code that
require dialing a 1 but not an area code before the 7 digits.
In addition to the fully programmable tables, ARS has four factory-set tables:
Dial 0 Table. This factory-set table routes calls to numbers that start with
0. The international dialing code, 011, is treated as a special case and
can be put into a programmable table. If 011 is not specified in a
programmable table, international calls are routed through the Dial 0
Table. Programming of this table is limited to a single pool, its FRL, and
system-prefixed digits.
Special Number (N11) Table. This factory-set table routes calls to the
special numbers 411, 611, 811, and 911. The main pool is always used.
This table is not programmable.
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Automatic Route Selection
and a 7-digit number to