Setting up a DECT telephone or 1&1 MultiPhone with the 1&1 DSL-Router

Open the user interface of your 1&1 DSL-Router. Enter http://fritz.box into the address line of your browser (Mozilla Firefox, Microsoft Internet Explorer or similar).

Alternatively, you can enter the IP address 192.168.178.1 or the IP address you have set. If you have protected the user interface with a password, enter it now.

Please note:
The interface on older firmware versions may look different. The process is, however, the same or very similar.

In the user interface for your 1&1 DSL-Router, click on DECT > Schnurlostelefone (DECT > Cordless telephones) (A) and then on Neues Gerät einrichten (Set up new device) (B).

Overview of connected DECT cordless telephones

Now DECT will register on your cordless telephone: During the search, your 1&1 DSL-Router will be shown in the display of the cordless phone as Basisstation 1 (Base station 1). Choose this base station in your DECT phone.

If you are prompted to enter a PIN, enter 0000. If you have set a different PIN for your 1&1 DSL-Router, enter this instead. Click on Weiter (Continue).

Registering DECT on your cordless phone

Your 1&1 DSL-Router will now establish the DECT connection with your cordless phone. Click on Weiter (Continue) as soon as you receive the message that registration has been successful.

Connecting the DSL-Router to the DECT telephone

Your DECT telephone will now be listed as a telephone under DECT > Schnurlostelefone (DECT > Cordless telephones). Click on the edit icon to adjust the settings.

Open settings for the DECT telephone

Now set a name for your DECT telephone. This will later appear on the call list for your 1&1 DSL-Router, which displays all incoming and outgoing calls. If you use more than one telephone, choosing different names for each provides a clearer overview.

Naming the DECT telephone

Choose which phone number you want to use to make outgoing calls (A). Then choose whether you want your DECT telephone to respond to all calls or only calls from specific numbers (B). Click on OK (C) to save.

Setting incoming and outgoing numbers

Switch to the Klingeltöne (Ringtones) menu (A). Click on Testen (Test) (B), to check the connection with your DECT telephone. If the test is successful, click on OK to confirm.
If the test is unsuccessful, check the pre-requisites mentioned at the start, as well as the settings on the DECT phone itself.

Test the connection between your 1&1 Router and your DECT phone