FRITZ!Box 7390 Service - Knowledge Base

FRITZ!Box 7390 Service

Conducting internal calls

If several telephones are connected to your FRITZ!Box, you can conduct (free) internal calls between the telephones. For example, you can use a cordless telephone to call a telephone connected to an analog extension of the FRITZ!Box.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Preparations

Telephones connected to the "FON S0" port on the FRITZ!Box either directly or via an ISDN PBX cannot automatically be reached internally. Although the FRITZ!Box assigns an internal telephone number to the telephones during setup, this telephone number must still be assigned in the telephone or the PBX:

Configuring a telephone in the FRITZ!Box

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Configure all of the telephones connected to the "FON S0" port as ISDN telephones. To do so, click the "Configure New Device" button and follow the instructions.

    Important:The wizard's ring test does not work due to an error in the FRITZ!Box. When you are asked "Is the telephone ringing?", select "Yes" even if the telephone does not ring.

  4. If you connected an ISDN PBX to the FRITZ!Box, also configure all of the analog telephones connected to this PBX as ISDN telephones in the FRITZ!Box. To do so, click the "Configure New Device" button and follow the instructions.

Assigning internal telephone numbers in the FRITZ!Box

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the (Edit) button for the relevant ISDN telephone.
  4. Select the internal telephone number, for example 52, from the drop-down list "Number of the terminal device".
  5. Click "OK" to save the settings.

Assigning internal telephone numbers in telephones

  1. Assign the internal telephone number to the ISDN telephone as the incoming telephone number. If the telephone is connected to a PBX, assign the telephone number to the extension of the PBX instead of to the telephone.

2 Conducting internal calls

Configuring a telephone to use the keypad function

Keypad sequences are strings of characters and numbers that you can use to enable or disable functions. No configuration is necessary to use keypad sequences with telephones, such as FRITZ!Fon C5, that are registered with the base station of your FRITZ!Box. If you want to use them with a telephone connected to the "FON S0" port or a cordless telephone that is not registered with the FRITZ!Box's base station, you must enable the keypad function first:

  1. Configure the telephone so you can send keypad sequences (sequences of characters and numbers, such as *121#) and enter special characters such as * and # with it. On many telephones, you can configure this function in the menu "Operation at a PBX > Dialing options > Dial * and #".

Making internal calls

  1. If all of the telephones connected to the FRITZ!Box should ring, enter **9 to initiate a broadcast call. The call is conducted with the party who picks up the telephone first.
    • If a specific telephone should ring, enter ** followed by the internal telephone number of the telephone.

      Example:
      To call a telephone connected to the "FON 1" port, enter **1.

      Note:You can find the internal numbers of the telephony devices in the FRITZ!Box user interface under "Telephone Book > Internal Numbers".