Cisco Linksys WAP55AG Manuale utente
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No:WAP55AG
Slide 1
WWW.LINKSYS.COM
Dual-Band Wireless A + G
Access Point
Model No: WAP55AG
August 2003
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No:WAP55AG
Slide 2
Agenda
•Knowledge Check
•Product Information
–Product Description
–Features & Benefits
–Home & Business Usages
–Package Contents
–Access Point’s Front Panel / Back Panel
–Technical Specifications
–Environmental Specifications
•Product Installation
–Hardware Installation
–Device Configuration using Setup CD
–User Interface
•Troubleshooting
•FAQs
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No : WAP51AB
Knowledge Check
•Access Point
The Instant Wireless Network Access Point is a transparent Media
Access Control (MAC) bridge that provides access for wireless stations
to a wired local area network (LAN).
With an Access Point, wireless workstations can be added quickly and
easily to an existing wired network.
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No : WAP51AB
•802.11a -- an extension to 802.11 that applies to wireless LANs
and provides up to 54Mbps in the 5GHz band. 802.11a uses an
orthogonal frequency division multiplexing encoding scheme
rather than FHSS or DSSS.
•802.11b (also referred to as
802.11 High Rate
or Wi-Fi) -- an
extension to 802.11 that applies to wireless LANS and provides 11
Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the
2.4 GHz band. 802.11b uses only DSSS. 802.11b was a 1999
ratification to the original 802.11 standard, allowing wireless
functionality comparable to Ethernet.
Knowledge Check
•802.11g - A extension of the IEEE 802.11 standard for wireless
networking hardware. The 802.11g specifications used by Linksys
specify a maximum data transfer rate of 54Mbps using OFDM
modulation, an operating frequency of 2.4GHz, backward compatibility
with IEEE 802.11b devices and WEP encryption for security.
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No : WAP51AB
•OFDM (Orthogonal Frequency Division Multiplexing)
Orthogonal frequency-division multiplexing (OFDM) is a method of
digital modulation in which a signal is split into several narrowband
channels at different frequencies.
•ISM band - The FCC and their counterparts outside of the U.S. have
set aside bandwidth for unlicensed use in the ISM (Industrial,
Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in
particular, is being made available worldwide.
Knowledge Check
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No : WAP51AB
•Frequency Hopping Spread Spectrum (FHSS) uses a narrowband
carrier that changes frequency in a pattern that is known to both
transmitter and receiver. Properly synchronized, the net effect is to
maintain a single logical channel. To an unintended receiver, FHSS
appears to be short-duration impulse noise.
•Direct Sequence Spread Spectrum (DSSS) generates a redundant
bit pattern for each bit to be transmitted. This bit pattern is called a
chip (or chipping code). The longer the chip, the greater the
probability that the original data can be recovered. Even if one or
more bits in the chip are damaged during transmission, statistical
techniques embedded in the radio can recover the original data
without the need for retransmission. To an unintended receiver,
DSSS appears as low power wideband noise and is rejected (ignored)
by most narrowband receivers.
Knowledge Check
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No : WAP51AB
Wireless Network Type - Infrastructure
WAP55AG
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No:WAP55AG
Slide 8
Knowledge Check
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No:WAP55AG
Slide 9
•The Linksys Dual-Band Wireless A+G Access
Point gives you universal wireless
connectivity. It’s the best way to add
wireless capability to your existing wired
network, or to add bandwidth to your
wireless installation.
•The Dual-Band Wireless A+G Access Point
contains two separate wireless connectivity
radio transceivers, which support all three
popular wireless networking specification.
•Protects your data and privacy, the A+G
Access Point can encrypt all wireless
transmissions. The MAC Address filter lets
you decide exactly who has access to your
wireless network, while Dynamic Frequency
Selection (DFS) puts your network on the
cleanest channel in your location.
Product Description
© 2003 Cisco Systems, Inc. All Rights Reserved. Model No:WAP55AG
Slide 10
Features and Benefits
Features
•Dual-band, tri-standard Access
Point communicates with
Wireless-A (802.11a), Wireless-
B (802.11b), and Wireless-G
wireless networks
•Protect your wireless
investment while preparing your
infrastructure for the future
•Advanced features: SNMP
manageability, and Dynamic
Frequency Selection (DFS)
•Powerful security: Up to 152-bit
wireless data encryption (WEP),
and wireless MAC address filter
Benefits
•Set up a high-speed Wireless-G
network in your home or office
•Data rates up to 54Mbps – almost
five times as fast as Wireless-B
(802.11b)
•Also interoperates with Wireless-B
networks (at 11Mbps)
•Advanced wireless security with
128-bit WEP encryption and MAC
filtering
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