FRITZ!Box 7590 Service - Knowledge Base

FRITZ!Box 7590 Service

Number of telephony and DECT devices that can be used with the FRITZ!Box

You can use different types of telephony devices, for example telephones, fax devices, answering machines, or PBXs, with your FRITZ!Box. Your line type determines how many devices can be used.

1 DECT devices

The following DECT devices can be registered with the FRITZ!Box at the same time:

  • six cordless telephones, for example FRITZ!Fon C5
  • six DECT repeaters, for example FRITZ!DECT Repeater 100
  • twelve radiator controls, for example FRITZ!DECT 300
  • ten switchable sockets, for example FRITZ!DECT 210
  • ten HAN FUN devices from other manufacturers

    Note:The "DECT" button on the FRITZ!Box is used to connect HAN FUN devices with the FRITZ!Box; they can then be configured under "Home Network > Smart Home" in the FRITZ!Box user interface.

2 IP telephones and IP door intercom systems

You can register a maximum of ten IP telephones (for example FRITZ!App Fon) or IP door intercom systems with the FRITZ!Box.

3 Analog devices

The FRITZ!Box has different sockets for analog devices:

  • "FON 1" and "FON 2" for devices with an RJ11 plug
  • "FON 1" for devices with a TAE plug

You can connect two analog devices to the FRITZ!Box at the same time, for example a telephone, fax machine, and/or door intercom system. One "FON 1" port must remain free (unassigned).

4 ISDN devices

You can connect up to eight devices at the same time, for example a telephone or PBX, to the "FON S0" port on the FRITZ!Box by means of an ISDN hub or S0 bus cabling. The FRITZ!Box can provide power to one ISDN device. The other ISDN devices must use their own power supply.

The ISDN service indicators you can use depends on whether you use your landline or the internet (VoIP) to make the call. You can use the following ISDN service indicators when making calls over the internet (VoIP), on an analog landline or an ISDN line:

  • Voice (service indicator 1)
  • Audio 3.1 (service indicator 4)
  • Telephony (service indicator 16)
  • Fax G2/G3 (service indicator 17)

When making calls on an ISDN line, you can also use the following ISDN service indicator:

  • Data (service indicator 2)

5 Integrated answering machine and fax function

You can use your FRITZ!Box as a fax and answering machine, without having to connect any additional devices. The FRITZ!Box can be used to send and receive faxes and you can configure up to five different answering machines.