AT&T 7406BIS User Manual page 10

Voice terminal with communications system generic 2 and system 85 functions

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Provides total voice terminal operation without using the

S101A and S201A

handset. Turning on the speakerphone is equivalent to going

Speakerphone

off-hook when placing or answering a call and turning off the

speakerphone is equivalent to going on-hook. A mute switch

is provided to temporarily cut off transmission to the distant

caller.

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Definity and system 85 7406bis