Ericsson IP Vision Dialog 4425 User Manual page 86

Other Useful Features
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Doorphone
The Doorphone is used to monitor the admission to your company,
i.e you can open the doorlock from your phone.
Answering Doorphone calls
Lift the handset.
You will be in speech connection with the calling party.
Opening of the doorlock
After you have answered the Doorphone, you can open the door
making an inquiry to the door-opener's directory number.
Press.
z
Enter the door-opener´s directory number.
Please ask your system administrator for the number.
Note: You can also program the door-opener's directory
number as a Common Abbreviated Number or a Function
key.
BusinessPhone – Ericsson Dialog 4425 IP Vision