FRITZ!Box 3390 Service - Knowledge Base

FRITZ!Box 3390 Service

Setting up the FRITZ!Box to conduct calls over another FRITZ!Box

If you have two FRITZ!Boxes, you can configure them so that the numbers configured in the FRITZ!Box (router) connected to your line are also available to the second FRITZ!Box (IP client). This way you can also use the second FRITZ!Box to conduct calls, even if it does not have access to the Internet.

Important:The instructions for configuring the FRITZ!Box (router) are valid for the FRITZ!Box model given above these instructions. For the instructions on configuring the FRITZ!Box (IP client), we used a FRITZ!Box with FRITZ!OS 6.30 or later as an example. You can find the version of FRITZ!OS on the "Overview" page of the FRITZ!Box user interface.

Requirements / Restrictions

  • The FRITZ!Box (router) must already be configured for making calls and be connected to the FRITZ!Box (IP client).
  • All of your telephone numbers must be configured the FRITZ!Box (router).
  • Various functions cannot be used with the FRITZ!Box (IP client). This is the case with busy on busy and call-back on busy / no response, for example. In addition, neither faxing nor data connections are reliable.

Note:The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS for your FRITZ!Box.

1 Deleting dialing rules in the FRITZ!Box (IP client)

  1. Click "Telephony" in the user interface of the FRITZ!Box (IP client).
  2. Click "Call Handling" in the "Telephony" menu.
  3. Click on the "Dialing Rules" tab.
  4. Delete all of the dialing rules that can be deleted.
  5. If a dialing rule cannot be deleted, call up its settings and select the option "Internet automatically" for "Connect via".

    Important:Only configure new dialing rules in the FRITZ!Box (router)!

2 Configuring FRITZ!Box (IP client) as an IP telephone in the FRITZ!Box (router)

Registering FRITZ!Box (IP client) as an IP telephone with the FRITZ!Box (router)

  1. Click "Telephony" in the user interface of the FRITZ!Box (router).
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the "Configure New Device" button.
  4. Enable the option "Telephone (with or without answering machine)" and click "Next".
  5. Enable the option "LAN/WLAN (IP telephone)" and click "Next".
  6. Enter a password that is at least 8 characters long and does not contain the user name.
  7. Click "Next".
  8. Select the telephone number to be used by the FRITZ!Box (IP client) to make calls.
  9. Click "Next".
  10. Select the numbers that the FRITZ!Box (IP client) should react to when you receive calls.
  11. Click "Next" and then "Apply" to save your settings.

Entering new telephone numbers in the FRITZ!Box (IP client)

  1. Click "Telephony" in the user interface of the FRITZ!Box (IP client).
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click the "New Telephone Number" button.
  4. Enable the option "Internet telephone number" and click "Next".
  5. Select "Other provider" from the drop-down list.
  6. Enter the following information:
    • Number and user name:
      • Enter the number displayed in the user interface of the FRITZ!Box (router) for the user name (for example 620) in all of the fields for numbers and user names.
    • Password:
      • Enter the same password that you used for the IP telephone in the user interface of the FRITZ!Box (router).
    • Registrar:
      • Enter the IP address of the FRITZ!Box (router). The FRITZ!Box has the IP address 192.168.178.1 in the factory settings.
    • Proxy server:
      • Do not enter a proxy server.
    • STUN server:
      • Do not enter a STUN server.
  7. Click "Next" and follow the Wizard's instructions.

Configuring a telephone connected to the FRITZ!Box (IP client)

So far, you have only configured a new telephone in the FRITZ!Box (router). Now you just have to "transmit" the settings for this telephone to a telephone connected to the FRITZ!Box (IP client):

  1. Click "Telephony" in the user interface of the FRITZ!Box (IP client).
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the "Configure New Device" button.
  4. Enable the option "Telephone (with or without answering machine)" and click "Next".
  5. Select the port your telephone is connected to. Enter a name for the telephone and click "Next".
  6. When you are asked "Is the telephone ringing?", select "Yes" if the connected telephone rings.
  7. When asked which number should be used to conduct the calls, select the Internet telephone number you used to register the FRITZ!Box (IP client) as an IP telephone with the FRITZ!Box (router).
  8. Click "Next".
  9. Enable the "all incoming calls" option.
  10. Click "Next" and then "Apply" to save your settings.

Example configuration

In the following example, the telephone connected to the FRITZ!Box (IP client) uses the telephone number 3333 to make calls and reacts to incoming calls to the numbers 3333 and 4444:

IP telephone in the FRITZ!Box (router)Telephone number in the FRITZ!Box (IP client)Telephone connected to the FRITZ!Box (IP client)
User name: 620
Password: secret
Number for outgoing calls: 3333
Numbers for incoming calls: 4444
Telephone number for registration: 620
Internal telephone number in the FRITZ!Box: 620
User name: 620
Password: secret
Registrar: IP address of the FRITZ!Box (router)
Number for outgoing calls: 620
Number for incoming calls: all
Table: Example for a telephone connected to the FRITZ!Box (IP client)

If you would like to assign different numbers to different telephones connected to the FRITZ!Box (IP client), register the FRITZ!Box (IP client) as an IP telephone with the FRITZ!Box (router) several times. You could then configure another telephone connected to the FRITZ!Box (IP client) so that the telephone uses the number 5555 to make calls and reacts to all incoming calls, for example:

IP telephone in the FRITZ!Box (router)Telephone number in the FRITZ!Box (IP client)Telephone connected to the FRITZ!Box (IP client)
User name: 621
Password: secret
Number for outgoing calls: 5555
Numbers for incoming calls: all
Telephone number for registration: 621
Internal telephone number in the FRITZ!Box: 621
User name: 621
Password: secret
Registrar: IP address of the FRITZ!Box (router)
Number for outgoing calls: 621
Number for incoming calls: all
Table: Example for an additional telephone connected to the FRITZ!Box (IP client)

3 Using a telephone book with the FRITZ!Box (IP client)

With the FRITZ!Box (IP client) you can use quick-dial or the vanity code (string of letters) to dial a number saved in the telephone book of the FRITZ!Box (router):

  • Dial *#**7[quick-dial]#,
    • or
  • Dial *#**8[vanity code]#.

4 Functions supported by the FRITZ!Box (IP client)

You can use the FRITZ!Box (IP client) to make internal calls and use the functions CLIP (forwarding caller IDs) and CLIR (withholding own caller ID). We cannot guarantee that other functions can be used.