AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 191

System Features
4. If extra digits at the beginning of the dialed number may be required for
the system to place a call on a particular pool, enter the digits (0 through
9) in the same row as the pool number, in the column under the Other
Digits heading. (See the Other Digits example below, in Figure 4–5.)
These special access or account codes can range from a single digit,
such as 9, to a maximum of 20 digits.
Because calls to the 15 area codes shown on Figure 4 4 should be placed on
the cross-country WATS lines/trunks when all the northeastern WATS
lines/trunks are busy, the number of the cross-country WATS pool, 890, is used
in both cases. An FRL of 4 is assigned to restrict some users from using cross-
country WATS lines/trunks.
Example. If a business uses a different long-distance company for calls to nine
area codes in Canada, accessing the alternate long-distance company lines
requires getting a local line and dialing seven digits. The completed form for the
Area Code Table that routes these calls to the alternate long-distance company
lines is shown in Figure 4 5.
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Features