AT&T Callmaster Series Reference Manual page 472

ISDN 7505 Modular Terminal
CONFERENCE/RING button
DROP/TEST button
TRANSFER button
HOLD button
SPEAKER button
MUTE button
REDIAL/or feature button
SELECT button
Message Light
The red Message light goes on when a message is left for the user. It goes off when the user
retrieves the message.
Call Appearance/Feature buttons
The 7505 has nine or 10 call appearance buttons. These same 10 buttons, when properly
administered, can be used for activating features. One of these buttons is used as a
DATA/SEND/OFF button if the set has data capability.
Feature-Only Button
The 7505 has three buttons that are used for features. When used with the SELECT button
these buttons can be used for three additional custom features. In addition to these three but-
tons, the REDIAL button provides another custom feature button.
Self-Test
The 7505 has a local self-test. When used with the SELECT button, the DROP/TEST button
begins and ends the self-test.
MUTE button
Pressing the MUTE button mutes the handset or the speakerphone, whichever is active. The red
light next to the MUTE button goes on. The user is placed in a listen-only mode.
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