FRITZ!Box 7583 Service - Knowledge Base

FRITZ!Box 7583 Service

Maximum number of calls over the FRITZ!Box

The maximum number of calls that can be conducted over the FRITZ!Box is limited by the interface (for example DECT, LAN, FON 1). You can conduct eight calls over the internet. Below you will find the number of calls possible with each type of interface. To find out how many calls you can conduct with your devices, you must do a little calculating. We have given you a couple of calculation examples.

1 IP telephones

Two connections are established when making calls with an IP telephone that is configured for the "LAN/WAN" port. Therefore, you can conduct a maximum of four calls at the same time with IP telephones, and the number of possible calls is reduced.

Example:
If you conduct a call with an IP telephone, six additional calls can be made using the other interfaces.
If two IP telephones are being used to conduct calls, four additional calls can be made using the other interfaces.
If four IP telephones are being used to conduct calls, no additional calls can be conducted using the other interfaces.

2 DECT devices

You can conduct a maximum of three calls at the same time using cordless telephones that are registered with the FRITZ!Box's DECT base station.

Example:
If calls are being conducted with three cordless telephones and an IP telephone, three additional calls can be made using the other interfaces.
If three cordless telephones and two IP telephones are being used to conduct calls, one additional call can be conducted using the other interfaces. You cannot conduct an additional call with an IP telephone.

3 Analog devices

One call can be conducted with each of the analog devices connected to the socket "FON 1" or "FON 2".

4 ISDN devices

A maximum of two calls can be conducted with ISDN devices connected to the socket "FON S0". If you use the adapter included with delivery to connect an ISDN PBX that supports point-to-point connections with 4 B channels, you can conduct four calls.

5 Integrated answering machine and fax function

The answering machine and the fax can each accept one call. All other callers hear a busy signal, even if you set up more than one answering machine. You cannot send a fax while receiving a fax, and you cannot receiving a fax while sending one.