500 basic – Siemens optiPoint family User Manual
Page 27
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optiPoint 500 basic.
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12 function keys with light-emitting
diodes
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Open listening
●
Integral USB 1.1 interface
●
1 adapter socket
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1 interface for up to 2 auxiliary devices:
• optiPoint key module
• optiPoint signature module
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Alphanumerical LCD display, tilting,
with two lines of 24 characters
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3 dialog keys for interactive user
guidance: Yes, Return and Continue
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2 adjusting keys (plus, minus) for idle
tone volume, idle tone quality, call
waiting tone and display contrast
(depending on system)
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Suitable for wall mounting
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Colors: arctic, mangan
500 basic.
7
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