Televic Confidea, Инструкция по установке и эксплуатации

Страница: 17 / 69

Confidea Wireless System Installation and User Manual
Televic Conference Systems 2008-09-05 17
5. Wireless networks
and frequency
bands
5.1. Wireless LAN
Most of the wireless local area computer networks
today are based on the IEEE 802.11 a/b/g standards.
These standards were developed by the IEEE
(Institute of Electrical and Electronics Engineers) in
order to insure inter-operability between different
WLAN vendors. Refer to Table 5.1: Wireless LAN
standardsTable 5.1 for an overview of the different
standards:
Table 5.1: Wireless LAN standards
802.11
Standard
Release
Date
Frequency
(GHz)
Maximum
bit rate
(Mbits/sec)
Modulation
type
a 1999 5 54 OFDM
b 1999 2.4 11 DSSS
g 2003 2.4 54 OFDM
5.2. Televic Confidea
system
The wireless network of the Televic Confidea system
is based on the 802.11 a/g standards.
Additional protocols have been added on top of the
802.11 a/g standards to provide high robustness
against interference from other wireless devices.
These additional protocols also ensure a guaranteed
quality of service for the audio streams on the
wireless network.
The Confidea system supports the following
frequency bands (refer to Table 5.2):
Table 5.2: Frequency bands supported by Confidea
ISM 2.4 GHz RLAN low RLAN high ISM 5 GHz
2412 MHz 5180 MHz 5500 MHz 5745 MHz
2417 MHz 5200 MHz 5520 MHz 5765 MHz
2422 MHz 5220 MHz 5540 MHz 5785 MHz
2427 MHz 5240 MHz 5560 MHz 5805 MHz
2432 MHz 5260 MHz 5580 MHz
2437 MHz 5280 MHz 5600 MHz
2442 MHz 5300 MHz 5640 MHz
2447 MHz 5320 MHz 5660 MHz
2452 MHz 5680 MHz
2457 MHz 5700 MHz
2462 MHz
2467MHz
2472 MHz
In the 2.4 GHz ISM (Industrial Scientific Medical)
band, there are 13 overlapping wireless carriers
available. Only 3 non-overlapping carriers are
available.
In the “ RLAN low ” frequency band, there are 8 non-
overlapping wireless carriers. In Europe all of these
wireless carriers can be used. In the USA and Canada
(FCC regulations) only the 4 lowest wireless carriers
Note:
The 2.4GHz and 5GHz frequency bands
are license free world wide.
However you must be aware of country
specific limitations and follow them.