FRITZ!Box 7330 Service - Knowledge Base
Maximum number of calls over FRITZ!Box
If you have configured several Internet telephone numbers in the FRITZ!Box, you can conduct up to five Internet calls over the FRITZ!Box at the same time.
If you cannot conduct more than one call, then your provider does not allow you to conduct several calls at the same time.
If you have connected the FRITZ!Box to an analog landline, you can also conduct an additional call over your landline.
Note:The FRITZ!Box allows you to conduct up to three calls over your landline and/or the Internet at the same time using the DECT base station. With IP telephones, you can conduct a maximum of two Internet calls at the same time.