FRITZ!Box 6890 LTE Service - Knowledge Base

FRITZ!Box 6890 LTE Service

Setting up an ISDN door intercom system in the FRITZ!Box

You can set up an ISDN door intercom system in the FRITZ!Box and then use a telephone to accept door calls, speak with visitors, and open the door.

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

1 Connecting the door intercom system

  1. Connect the door intercom system to the "FON S0" socket on the FRITZ!Box.

2 Setting up a door intercom system

  1. Configure 99999 in the door intercom system as its MSN.

    Note:Automatic outside line access is deactivated for ISDN devices connected to the "FON S0" socket that transmit "99999" as their MSN to the FRITZ!Box.

  2. If a specific telephone should ring, configure the internal number of that telephone in the door intercom system as the destination call number.

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

    • If you want several telephones connected to the FRITZ!Box (call group) to ring, configure the quick-dial number, for example 701, of an internal call group as the destination call number.
    • If all of the telephones connected to the FRITZ!Box should ring, configure 9 to make a broadcast call.