FRITZ!Box 6490 Cable Service - Knowledge Base

FRITZ!Box 6490 Cable 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.

Requirements / Restrictions

  • Only functions that the door intercom system provides according to the specifications for EuroISDN/DSS1 can be used with it. Any proprietary functions (functions not defined in this standard) it offers cannot be used.

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.