BusinessPhone – Dialog 4223 Professional / Dialog 3213
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

Secondary on/off

Press (pre-programmed).

Or:

Dial to log on the secondary telephone.

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

Secondary on/off

Press (pre-programmed).

Or:

Dial 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

Inquiry

Press and dial own directory number.

Transfer

Press.

© Ericsson Enterprise 2003