AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 63)

63 BusinessPhone – Dialog 4187 Plus
Other Useful Features
Tandem Configuration
The Tandem configuration is a unit, consisting of two telephones
using the same directory number. One of the telephones is defined
as the primary and the other one as the secondary.
This function enhances the communication for users that, for
example, have a wired phone on their desk (the primary telephone)
and need to be mobile within their company’s building with their
own portable (the secondary telephone). Basically the Tandem
configuration works as follows:
To activate the Tandem configuration u
Lift the handset. *28#
Dial to log on the secondary telephone.
Verification tone. d
Replace the handset to finish the procedure.
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 u
Lift the handset. #28#
Dial to log off the secondary telephone.
Verification tone. d
Replace the handset to finish the procedure.
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.