To log off
#11# ÛÜ Dial.
ÙÚ Wait for the call timer to start in the display.
Press to finish the procedure.
Enter the Authorization Code and press.
Dial.
*11* ¿ *
¿ # ÛÜ Enter your extension number and press. ÙÚ Wait for the call timer to start in the display.
Press to finish the procedure.
The display shows your phone number.
To log on
Free Seating (optional)
The Free Seating function is used for persons who have an office extension number but no telephone set of their own. For example, flexible office workers, persons mostly outside the office, etc. As a free seating user and working from the office, you logon to any free telephone set that temporarily will be assigned with your extension number and your system authorities.

Free Seating (optional)

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DT590

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Ericsson DT59C manual Free Seating optional