FRITZ!Box 7490 Service - Knowledge Base

FRITZ!Box 7490 Service

Conducting calls with the FRITZ!Box over another router

The FRITZ!Box can also be used to conduct calls if another router (for example an IAD) in the network establishes the Internet connection. With the FRITZ!Box you can

  • use any Internet telephony provider from which you received login data for Internet telephone numbers. The Internet telephone numbers can either be from your provider or from a different Internet telephony provider.
  • use the router's sockets for telephony devices, if your provider enabled them.
  • conduct calls over a landline (analog or ISDN).

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS

1 Configuring Internet telephone numbers

2 Entering a STUN server

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click the button (Edit) for the relevant Internet telephone number.
  4. Check whether the field "STUN server" is shown under the fields for entering your account information.
    • If the field is shown and empty:
      • Enter the address of your Internet telephony provider's STUN server in this field and click "OK".
    • If the field is not shown:
      1. Select "Other provider" from the drop-down list, even if you are using a pre-configured Internet telephony provider.
      2. Check whether the "STUN server" field is now shown.
        • If the field is shown:
          • Enter the address of your Internet telephony provider's STUN server in this field and click "OK".
        • If the field is not shown, then the STUN server is preconfigured:
          • Click "Cancel".

3 Setting up port forwarding for Internet telephony

Since the upstream router establishes the Internet connection, you must enable port forwarding for telephony:

Setting up automatic port forwarding

If you enable port forwarding in the FRITZ!Box, then the FRITZ!Box sends IP packets on a regular basis and the router's port forwarding automatically remains enabled:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click on the "Line Settings" tab.
  4. Enable the option "Keep port forwarding of the Internet router enabled for telephony".
  5. Select a suitable time interval. Select "30 seconds" if you do not know how long the router the FRITZ!Box is connected to maintains temporary port forwarding rules.
  6. Click "Apply" to save your settings.

Setting up static port forwarding

If the router does not support automatic port forwarding via the FRITZ!Box, set up static port forwarding for Internet telephony in the router:

Note:You can find information on configuring the router in its manual, or consult its manufacturer directly.

  • From any UDP ports >= 1024 (for example 6078-6097) to ports 7078-7109 on the FRITZ!Box
  • From UDP port 5060 to port 5060 on the FRITZ!Box

4 Configuring the FRITZ!Box for landline telephony

If the router is equipped with a socket for connecting telephony devices that has been enabled by your provider, connect the FRITZ!Box to the router as follows:

Note:You can also connect the FRITZ!Box to a landline, if one is available. You can find information on connecting it in the FRITZ!Box's manual.

Connecting the FRITZ!Box

If both ISDN and analog end devices can be connected to the router, connect the FRITZ!Box to the socket for ISDN devices on the router:

  1. Plug the longer end of the DSL/telephone cable ("Y cable") included with delivery into the socket on the back of the FRITZ!Box labeled "DSL/TEL".
  2. If the router has a socket for ISDN devices, plug the black plug on the split end of the cable directly into this socket,
    • or, if the router only has a socket for analog devices:
      • Plug the black plug on the split end of the cable into this socket. If the plug does not fit into the socket, refer to your provider for a suitable adapter.

Configuring landline numbers

Now you can assign numbers to the telephony devices connected to the FRITZ!Box and use them for making and receiving calls.