Speakerphones - AT&T MERLIN LEGEND Release 2.0 Programming Summary Manual

Telephones
Analog Multiline Telephones without
Built-in Speakerphones
Use this procedure to identify those telephones that do not have the built-in
speakerphone or Hands Free Answer on Intercom (HFAI) capability for analog
multiline telephones with flat membrane buttons. The models that must be
identified are 5-Button, 10-Button, 34-Button, and 34-Button Deluxe analog
multiline models with flat membrane buttons.
Keep the factory setting for analog multiline models with raised plastic
buttons, including the following models: 10-Button HFAI, 34-Button with
speakerphone (SP-34), 34-Button with speakerphone and display (SP-34D),
BIS-10, BIS-22, BIS-34, BIS-22D, and BIS-34D.
This procedure is not needed for MLX or single-line telephones.
9-12
Analog Multiline Telephones without Built-in Speakerphones