AT&T MERLIN LEGEND System Reference Manual page 67

Features
Automatic Route Selection
Callback
Conference
Coverage
Directory
Display
Queued Call Console
Remote Access
2-18 Account Code Entry
When ARS is used on the system, an account code can be entered before or
after dialing the telephone number. If Forced Account Code Entry is assigned,
the user must enter the oode before dialing the ARS dial-out code.
An account code must be entered before the user activates Callback. If not, the
user must wait until after the call is connected before entering the account code.
Account codes cannot be entered while the call is queued.
separate account code must be entered for each outside call added to a
A
conference.
When answering calls on a Primary Cover, Secondary Cover, or Group Cover
button, a receiver cannot enter an account code. The account code must be
entered from the sender's telephone. (If the receiver tries to enter an account
code, no error tone sounds and the account code does not appear on the
SMDR printout.)
Since Cover buttons are not required when the QCC queue is programmed as a
receiver for a Coverage group, a QCC system operator can enter account
codes and the account code appears on the SMDR printout.
An MLX-20L telephone user can program account codes either individually or
with a telephone number in a Personal Directory listing. However, the user must
lift the handset or press the Speakerphone button before selecting the listing
from the display.
When the Account Code Entry feature is activated, the "Acct:" message on the
display prompts the user to enter the account code. The account code digits
are shown next to the prompt as they are dialed.
On a QCC, Account Code Entry can be activated only by selecting the feature
from the display-not by feature codes.
Normally, account codes cannot be entered when a Group Coverage call is
answered at a Group Cover button programmed on a multiline telephone.
However, when the QCC queue is programmed as the receiver for a coverage
group, the QCC system operator can enter account codes and the account
code appears on the SMDR printout. Cover buttons are not required when the
QCC queue is programmed as a receiver for a coverage group.
Account codes cannot be entered on calls made via Remote Access.