AASTRA 4425 IP Vision for BusinessPhone User Guide - Manual (Page 84)

Other Useful Features
BusinessPhone – Dialog 4425 IP Vision 84
For incoming calls:
•
Both telephones are treated as 1 single extension.
For outgoing calls:
•
Both telephones are treated as 2 separate extensions.
To deactivate the Tandem configuration #28#
Press to log off the secondary telephone.
For incoming calls:
•
The secondary telephone cannot be called and the primary
telephone works as a normal stand-alone telephone.
For outgoing calls:
•
Both telephones are treated as 2 separate extensions.
Transferring a call between members of a Tandem unit
Line
Ô
Press.
z
Enter own directory number.
í
Press to finish the procedure.