AT&T MERLIN LEGEND System Reference Manual page 77

Features
Auto Answer Intercom
Extension Programming
Description
See Chapter 5 for more on the HFU.
Telephone Differences
Considerations
2-28 Auto Answer Intercom
Programming Code: *753
MLX Display Label:
telephone programming only)
Some models of analog multiline telephones do not have a built-in
speakerphone. Users with this type of telephone can still answer inside calls
without lifting the handset by using Hands Free Answer on Intercom (HFAI). By
connecting an optional Hands-Free Unit (HFU), a user can also answer outside
calls without lifting the handset.
The Auto Answer Intercom feature expands the capabilities of the HFU to
include inside calls received on an Intercom or System Access button. With
Auto Answer Intercom, the HFU can be used to answer both inside and outside
calls without lifting the handset.
To activate Auto Answer Intercom, the user presses the Auto Answer Intercom
button. The green LED next to the button turns on, and the HFU turns on
automatically when an inside or outside call is received.
To deactivate the feature, the user presses the Auto Answer Intercom button.
The green LED next to the button turns off, and the HFU turns on automatically
only when outside calls are received.
Auto Answer Intercom cannot be used on an MLC-5 cordless telephone, MLX
telephone, or single-line telephone.
Feature codes cannot be used to activate or deactivate Auto Answer
Intercom.
Only analog multiline telephones without a built-in speakerphone can use
Auto Answer Intercom.
Both Auto Answer Intercom and Auto Answer All can be programmed on an
analog multiline telephone, but they cannot be used at the same time.
Auto Answer All should be used instead of Auto Answer Intercom to allow an
answering device to answer intercom calls. Using Auto Answer Intercom can
cause intercom calls to be dropped.
In the Hybrid/PBX mode, when Auto Answer Intercom is activated and a call
is received on a System Access button, the HFU turns on even if the button is
programmed for Delayed Ring or No Ring.
AutoAnsIcom (centralized