Rosewill RNX-AC600UB Bedienungsanleitung PDF herunterladen (Seite 47)

Wireless Dual Band USB Adapter RNX-AC600UB User Manual

Address’ down, then present this value to the owner of

access point so he / she can add the MAC address of your

network card to his / her access point’s list.

The network is slow /

having problem when

transferring large files

1. Move closer to the place where access point is located.

2. There could be too much people using the same radio

channel. Ask the owner of the access point to change the

channel number.

Please try one or more solutions listed above.

4-3 Glossary

1. What is the IEEE 802.11g standard?

802.11g is the new IEEE standard for high-speed wireless LAN communications that provides

for up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is quickly becoming the next

mainstream wireless LAN technology for the home, office and public networks.

802.11g defines the use of the same OFDM modulation technique specified in IEEE 802.11a for

the 5 GHz frequency band and applies it in the same 2.4 GHz frequency band as IEEE 802.11b.

The 802.11g standard requires backward compatibility with 802.11b.

The standard specifically calls for:

A. A new physical layer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz frequency

band, known as the extended rate PHY (ERP). The ERP adds OFDM as a mandatory new

coding scheme for 6, 12 and 24 Mbps (mandatory speeds), and 18, 36, 48 and 54 Mbps

(optional speeds). The ERP includes the modulation schemes found in 802.11b including

CCK for 11 and 5.5 Mbps and Barker code modulation for 2 and 1 Mbps.

B. A protection mechanism called RTS/CTS that governs how 802.11g devices and 802.11b

devices interoperate.

2. What is the IEEE 802.11b standard?

The IEEE 802.11b Wireless LAN standard subcommittee, which formulates the standard for the

industry. The objective is to enable wireless LAN hardware from different manufactures to

communicate.

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