AT&T 7406BIS manual Drop button

Drop button	For disconnecting from a call or dropping the last party
	added to a conference call.
Conference button	For setting up conference calls.
Message light	For indicating when a message has been left for you (steady
	green light).

The following optional modules are compatible with the 7406BIS voice terminal:

500A Headset Adapter Provides a dual-purpose switch that turns on the adapter connecting the headset to the voice terminal. Pressing the ON switch is equivalent to going off-hook with the handset, and pressing the OFF switch is equivalent to going on-hook with the handset.

7400B Data Module Provides data capability to the attached DCP voice terminal. It also provides integrated simultaneous voice data communications over standard twisted-pair wiring.

C401A or C401B Call Provides 20 call appearance/feature buttons to supplement

Coverage Module those on the associated voice terminal. For more information about using the features assigned to this module, see the appropriate feature procedures that follow.

D401A Digital Display Provides visual indication of call-related information, time

Moduleand date, elapsed time on calls, messages, and abbreviated dialing numbers.