Operation Manual

How Does Internet Telephony Work?
36 FRITZ!Box Fon WLAN – 5 Configuring FRITZ!Box Fon WLAN for Telephone Connections
Telephony Scenarios
If you have configured both a fixed-line number and an Inter-
net number in FRITZ!Box Fon WLAN, you can make calls in all
directions:
z from the fixed-line network into the fixed-line network
z from the Internet into the fixed-line network
z from the Internet into the Internet
and receive calls from all directions as well.
Bandwidth Management with FRITZ!Box Fon WLAN
FRITZ!Box Fon WLAN is equipped with integrated bandwidth
management. This function ensures that the speech quality
during telephone calls over the Internet is not reduced by
surfing activity. FRITZ!Box Fon WLAN adjusts all uploads and
downloads to the currently available bandwidth. Because
FRITZ!Box Fon WLAN also places a higher priority on Internet
telephony connections over Internet data connections, un-
welcome interference is largely avoided. However, this is al-
so true for Internet telephony: once the conversation capaci-
ty has been reached, the remote site will receive a busy sig-
nal.