AT&T MERLIN LEGEND System Reference Manual page 367

Features
System Numbering
System Progmmming
2-318 Remote Access
If the caller uses Remote Access to dial out on a line or trunk, the "Station" field
is blank on the first SMDR record and a second record is generated for the
outgoing call.
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 overrides the barrier code number (00-16) printed in
the Account Code column.
If the system includes DID or dial-in tie trunks, the number assigned to the trunk
can be programmed to reach the Remote Access code. This allows Remote
Access users to call in on the DID or dial-in trunk.
The Remote Access code can be renumbered. The factory-set Remote Access
code is 669.
Assigned Dedicated or Shared Remote Access to lines/trunks.
LinesTrunks -> RemoteAccss -> Lines Trunkst
If barrier codes are not used, assign class of restriction to lines/trunks.
LinesTrunks -> RemoteAccss -> Non-TIE or Tie Lines
Assign barrier codes and/or change class of restriction for each barrier
code.
LinesTrunks -> RemoteAccss -> BarrierCode
Activate or deactivate Callback for busy pools (Hybrid/PBX only).
LinesTrunks -> RemoteAccss -> AutoQueuing