AASTRA DT4x2 for BusinessPhone User Guide EN - Manual (Page 75)

75 BusinessPhone – Cordless DT412/DT422/DT432
Other Useful Features
Other Useful Features
By using these features your productivity will be increased, e.g. you
can set reminders for important meetings, place the costs for
external calls on separate accounts and much more ...
Tandem configuration
The Tandem configuration is a unit, consisting of two phones using
the same directory number. One of the phones 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 phone) and need to be
mobile within their company’s building with their own Cordless (the
secondary phone). Basically the tandem configuration works as
follows:
To activate the Tandem configuration æ
Press. *28#
Dial to log on the secondary phone.
For incoming calls:
•
Both phones are treated as 1 single extension.
For outgoing calls:
•
Both phones are treated as 2 separate extensions.