Manual AVM fritz box fon wlan 7570 (page 126 of 159) (English)

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FRITZ!Box Fon WLAN 7570 vDSL 126

Frequency Ranges

In the 5-GHz frequency band, your FRITZ!Box occasionally

may change channels unexpectedly due to DFS (Dynamic

Frequency Selection) if a “higher privileged user” simulta-

neously claims the selected channel. This can happen es-

pecially when military or civilian radar is used in the imme-

diate vicinity.

A prerequisite for use of the 5-GHz frequency band is that

all WLAN adapters in the network support this frequency

range in accordance with the IEEE 802.11a or IEEE 8002.11n

standard.

2.4 GHz or 5 GHz The FRITZ!Box works in the WLAN network either in the 2.4-

GHz range or in the 5-GHz range, but not parallel in both fre-

quency ranges at the same time.

Bandwidth In both frequency ranges you can select between channel

bandwidths of 20 MHZ or 40 MHz (exception: channel 140

in the 5-GHz frequency band). The FRITZ!Box initially at-

tempts to select a channel with 40 MHz bandwidth

(throughput up to 300 Mbit/s). If this is not possible due to

interference or channels already being used by other

WLANs in the vicinity, the FRITZ!Box automatically switches

over to a channel with 20 MHz bandwidth. Greater band-

width provides for higher data throughput:

Increasing bandwidths also increases the probability of in-

terference by wireless networks in the vicinity. Large band-

widths reduce the frequency range available to other wire-

less networks in the vicinity.

Bandwidth (MHz) Maximum Data Throughput (Mbit/s)

20 130

40 300

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AVM fritz box fon wlan 7570 Manual

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