AT&T MERLIN LEGEND Release 4.0 Feature Reference page 498

Feature Reference
If a remote caller does not dial a number or feature code before the timeout
period expires, the call is sent to the redirect destination programmed for
Remote Access.
Trunks used for dedicated Remote Access must not be assigned to ring into a
calling group.
Systems using Call Accounting System (CAS) track calls by barrier codes.
Touch-Tone Receivers are needed for Remote Access to work. For more
information on TTR requirements see the Touch-Tone or Rotary Signaling
feature.
Mode Differences
Hybrid/PBX Mode
Remote access Automatic Callback is available only in Hybrid/PBX mode for
calls made to busy pools.
Feature Interactions
Account Code Entry
Allowed Lists
Automatic Route
Selection
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Remote Access
A remote access user cannot enter account codes. However, if a
remote access user calls an inside extension and the person at that
extension enters an account code, the code overwrites the barrier code
number (01–16) in the ACCOUNT field.
You cannot enter account codes on calls made through Remote
Access. However, if a remote access user calls an inside extension and
the person at that extension enters an account code, the code
overwrites the barrier code number (01–16) in the ACCOUNT field of the
SMDR report.
An Allowed List is one of the class of restriction items for Remote
Access. When barrier codes are not used, Allowed Lists can be
assigned to trunks systemwide (tie trunks and non-tie trunks are
grouped separately.) When barrier codes are used, Allowed Lists can
be assigned to individual barrier codes.
Remote access users can make calls by using ARS. Dial into the
system, enter a barrier code if one is required, and dial the ARS code
while listening to system dial tone. Facility Restriction Levels (FRLs) can
be assigned to restrict the routes that remote callers can use. When
barrier codes are not used, an FRL is assigned to all trunks (tie trunks
and non-tie trunks are grouped separately) and cannot be assigned to
individual trunks. When barrier codes are used, FRLs are assigned to
individual barrier codes.