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General information
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Single-line telephone / multi-line telephone
Your OpenStage 40 is a multi-line telephone. This means that multiple 
lines can be configured on your OpenStage phone, which is not the case 
with single-line phones. Each line is assigned an individual phone number 
which you can use to make and receive calls.
The programmable sensor keys function as line keys on multi-line phones 
Æ page 19.
The "Line overview" tab on the telephony interface provides information 
about the lines configured on your phone and the current status of each 
line 
When using a multi-line phone to make and receive calls, certain particu-
larities must be taken into account