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fixed feature keys: Goodbye, Message, Call log (including Redial List),
Applications, Shift, Goodbye, Hold, "Smart" Mute, and volume control
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Navigation cluster, Quit, and Copy
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three line by twenty-four character display area
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Call Log (includes Redial List)
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Group Listening
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on-hook dialing
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two accessory ports
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support for an amplified or unamplified headset
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Direct connect headset port
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Full icon support (with expansion module)
Telephones and Consoles
M 3900 description
Description, Installation, and Operation
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