Allied Telesis AT-WL2411 Bedienungsanleitung

High Performance Wireless Solution

Allied Telesyn's Wireless products provide the customer with the

highest performance available in the wireless marketplace today.The

transmit power and receive sensitivity of the AT-WR2411 allow it to

be used when other devices fail.The advanced software features of

the AT-WL2411 provide high-end functionality only available with the

more expensive products in the market. the world.

802.11b Wireless Access Point

AT-WL2411 wireless access point forms the basis of a wireless

solution that combines advanced security with high-end management

capabilities.The AT-WL2411 uses industry-standard IEEE 802.11b

high-rate and OpenAir wireless technologies to offer cable-free

networking at speeds of up to 11 Mbps.When combined with the

AT-WR2411 PC card, it provides a range and sensitivity that clearly

outdistances the competition.Weighing less than 8 ounces and

packaged in an attractive two-colour enclosure, the AT-WL2411 is

designed for easy integration into all office environments.

Increased Security

The AT-WL2411 now has increased security features with the

implementation of IEEE 802.1x.The 802.1x standard increases

security between the access points and the wireless end devices by

using an 802.1x authentication server to authenticate each device's

initial connection and by using rotating WEP keys

Ease of use

Designed for ease of installation and operation, the AT-WL2411

wireless access point automatically tracks and connects roaming

wireless clients without the cost and complexity of a dedicated

mobile IP server or additional hubs and cabling. In fact, with its fully

integrated IP tunnelling capabilities that allow large wireless LANs to

span across multiple subnets, users of wireless-enabled laptops and

other mobile computing devices are able to maintain a continuous,

high quality network connection while seamlessly roaming anywhere

throughout the enterprise.

www.alliedtelesyn.com

AT-WL2411 Wireless Accessories Guide

Table of Contents

Introduction 3

Regulatory Concerns 3

Basic Antenna Concepts 4

Radiation Patterns of Various Antennas 5

2.4GHz/900MHz Direct Connection Antenna Circuits 6

2.4GHz/900MHz Antenna Circuit with Splitter 7

2.4GHz/900MHz Antenna Circuit with Splitter and Lightning Suppressor 8

Antenna Installation/Preparation Guidelines 9

Configuration Example 10

Cable Assemblies

AT-INT069887-00 - Radiall (Lucent) / N Receptacle 11

AT-INT064616-00 - N Plug / N Plug, 30 inch 11

AT-INT063245-00 - N Plug / N Plug, 60 inch 11

AT-INT063246-00 - N Plug / N Plug, 20 feet 11

AT-INT071179-00 - N Plug / N Plug, 30 feet 11

AT-INT070403-00 - Radiall (Lucent) / N Plug 12

Close-up of N-Receptacle Connector 12

Close-up of Radiall Connector 12

Accessories

AT-INT069888-00 - Kit, Bracket, Mounting,Antenna 13

AT-INT069893-00 - Kit, Power Supply Holder 13

AT-INT061868-00 - Lightning Suppressor 13

AT-INT586610-00 - Spare/replacement Lightning Suppressor Capsule 13

Antennas

AT-INT063363-00 - Antenna, 2.4 GHz, 5dBi, Omni 14

AT-INT063365-00 - Antenna, 2.4 GHz, 15dBi,Yagi 15

AT-INT063366-00 - Antenna, 2.4 GHz, 14dBi, Flat Panel 16

AT-INT065349-00 - Antenna, 2.4 GHz, 9dBi, Omni 17

AT-INT067262-00 - Antenna, 2.4 GHz, 5dBi, Dual Flat Panel 18

AT-INT067263-00 - Antenna, 2.4 GHz, 9dBi, Flat Panel 19

- Rear View of 067263-00 19

AT-INT070141-00 - Antenna, 2.4 GHz, 3dBi, Mini Omni, (Radiall Conn) 20

AT-INT071121-00 - Antenna, 2.4 GHz, 3dBi, Diversity 21

AT-INT071122-00 - Antenna, 2.4 GHz, 9dBi, Corner Reflect 22

AT-INT071489-00 - Diversity Antenna, 0dBi, 2.4 GHz (Radiall Conn) 22

Power Over Ethernet

AT-INT071620-00 – 1-port Power Over Ethernet Bridge 23

AT-INT071578-00 – 6-port Power Over Ethernet Bridge 23

AT-INT071579-00 – 12-port Power Over Ethernet Bridge 23

AT-INT071581-00 – Power Over Ethernet Splitter 23

6 port and 12 port bridge characteristics 24

Introduction

The purpose of this document is to provide Allied Telesyn

customers with a tool which will enable them to better

understand how the various Allied Telesyn antennas, cable

assemblies, and accessories blend together. The accessories

listed in this document are designed for use with the AT-

WL2411 Wireless Access Point.Other Allied Telesyn Access

Points, ie. the AT-WL2400 are not designed for

interoperability with these accessories.

Regulatory Concerns

Note: The information below will help you to

understand some of the regulatory issues surrounding

the use of antenna, antenna circuits, and radios.

However, it is critical to remember that all antennas must

be approved and certified before they can be used with

radio (RF) equipment purchased from Allied Telesyn.

FCC

FCC requirements limit the total output power of a

wireless LAN system operating in the 900 MHz and 2.4

GHz frequency ranges to 4 Watts. This limit is expressed

in EIRP, which stand for "Effective Isotropically Radiated

Power." This is the total power created by the transmitter

and gain generated by the antenna, minus any loss due to

cabling and connections. Given this 4W (4000 mW)

maximum, the EIRP must not exceed 36dBi.

ETSI

ETSI requirements limit the total output power of a 2.4

GHz wireless LAN system to 0.1 Watt (100 mW). Given

this 100 mW maximum, the EIRP must not exceed

20dBm. 900 MHz systems are not allowed and UHF

system maximum EIRPs vary from country to country.

Most European countries such as France and Italy

operate under a lower power directive, which limits them

to a maximum output limit of 10 mW.

Non-ETSI & Non-FCC Countries

Electromagnetic-transmission regulations are mandated

by each country’s own governing body. Many countries

follow the directives issued by ETSI or the FCC but

others create their own regulations.

Before adding radios or antennas to a RF system, please

consult an Allied Telesyn Systems Engineer.

www.alliedtelesyn.com

Antennas and Power

Antennas do not increase nor decrease the power applied to

them. They can only transmit or receive the amount of

power that is applied to them. It is possible to have some

power loss before or after the signal leaves the antenna. An

example of this is "line loss: which is a decrease in power due

to imperfect connections and imperfect conductivity to

cabling materials. It is, however, possible to increase the

power output in a certain direction. But the total power

emitted will always be the same as the amount applied to the

antenna minus the amount lost due to line loss, ohmic loss,

reflection loss etc…

dBi – (decibels relative to an isotropic {spherical}

radiation pattern)

An isotropic antenna is a theoretical antenna that radiates

in the shape of a perfect sphere.

dBm –(decibels relative to one milliwatt)

dBm is a commonly used unit of measurement in the RF

industry that expresses radio frequency power relative to a

1 mW point of reference.

dBd –(decibels relative to a _ wave dipole

antenna)

dBd is gain with respect to a _ wave dipole antenna. Some

commercial antenna companies use dBd to rate their

antennas.

EIRP –(Effective isotropically radiated power)

The mathematical product of (1) the power supplied to the

antenna and (2) its gain.

Gain

Gain is given in dB (decibels). If an "I" is added as in 3dBi,

this rating is relative to an "isotropic" antenna. An isotropic

antenna is a theoretical antenna that radiates in the shape

of a perfect sphere. If a "d" is added as in 3dBd, this rating

is relative to a "dipole" antenna. A dipole antenna with a

rating of 2.14dB is equivalent to a 0dBd antenna.

Line-of-sight

This refers to the fact that some electromagnetic wave

frequencies require a clear line of sight between transmitter

and receiver. This is largely because higher frequency

electromagnetic waves, such as those in the 2.4 GHz range,

do not bend around or penetrate objects as well as some

lower frequency signals.

Multipath, Reflection, or Physical Interference

Because of the electromagnetic properties of waves used to

transmit data, large metal objects in the immediate

transmission path of the antenna will likely cause

distortion of the signal and should therefore be avoided.

Omni-directional

An omni-directional antenna radiates evenly horizontally

around the antenna in a plane parallel to the earth. These

antennas do not always radiate evenly vertically around the

antenna in a plane perpendicular to the earth. By giving up

vertical coverage, above and or below the antenna and

refocusing that signal around the antenna, it is possible to

achieve gain with an omni-directional antenna.

Omni-gain

Wavelength and operating frequency determine the size of

the antenna. By using a longer antenna, you do not achieve

greater overall coverage, but you can achieve greater

distance in a focused direction. For example, omni-

directional antennas with gain achieve some measure of

gain in the horizontal plane.

Basic Antenna Concepts

Omnidirectional: Circular pattern in open spaces: range is

slightly affected by antenna gain but the radiation pattern will

remain relatively circular.

Flat panel: Modest directional coverage with a slight

backlobe: The main lobe of the radiation pattern can be almost

circularto fairly oblong in shape.Good for slightly directional

coverage such as down corridors or away from walls.

Dual Flat panel: Bi-directional coverage: Good for

transmission down two opposing directions of a corridor.

DirectionalYAGI (High Gain): Highly focussed signal:

Good for wireless bridging or very specialized coverage. Not

available for_watt (500 mW), 2.4 GHz uses.

Antenna patterns are 3 dimensional. The radiation patterns

(above) are views of the azimuth plain, which is a top down view.

There must always be a tradeoff between gain and coverage area. As can be seen in the radiation patterns presented, the higher

the gain (directional distance) as with the Yagi antenna, the narrower the coverage. And conversely, the lower the gain, the more

universal the coverage about the antenna’s axis.

www.alliedtelesyn.com

Radiation Patterns of Various Antennas

2.4GHz/900MHz Direction Connection Antenna Circuits - A

2.4GHz/900MHz Antenna Circuit with Splitter - B

AT-WL2411

Access Point

AT-WL2411

Access Point

2.4GHz or 900MHz Antenna with

N Receptacle Connector

2.4GHz with N Receptacle Connector

AT-INT067266-00 Cable - 2’(61cm)

AT-INT071178-00 Cable - 12’(366cm)

AT-INT070402-00 Cable - MMCX

AT-INT070403-00 Cable - Radiall

AT-INT069888-00 Kit, Bracket mounting

AT-INT070140-00 Antenna, 3dBi Mini Omni, MMCX

AT-INT070141-00 Antenna, 3dBi Mini Omni, Radiall (Lucent)

AT-INT071488-00 Diversity Antenna, MMCX

AT-INT-071489-00 Diversity Antenna, Radiall (Lucent)

www.alliedtelesyn.com

2.4GHz/900MHz Antenna Circuit with Splitter - A

2.4GHz Antenna Circuit with Splitter - B

AT-WL2411

Access Point

AT-WL2411

Access Point

2.4GHz or 900MHz Antenna with

N Receptacle Connector

AT-INT063198-00 Splitter, 2.4GHz

AT-INT069304-00 Splitter, 900MHz

AT-INT063198-00

Splitter, 2.4GHz

2.4GHz Antenna with N Receptacle

Connector

AT-INT064616-00 Cable - 2.5’(76cm)

AT-INT063245-00 Cable - 5’(152cm)

AT-INT063246-00 Cable - 20’(610cm)

AT-INT071179-00 Cable - 30’(914cm)

AT-INT067265-00

Adapter Cable - 1’

(30cm)

AT-INT069866-00 Cable - MMCX

AT-INT069887-00 Cable - Radiall

AT-INT069888-00 Kit, Bracket, Mtg

Splitter

AT-INT064616-00 Cable - 2.5’(76cm)

AT-INT063245-00 Cable - 5’(152cm)

AT-INT063246-00 Cable - 20’(610cm)

AT-INT071179-00 Cable - 30’(914cm)

2.4GHz/900MHz Antenna Circuit with Splitter & Lightning Suppressors - A

2.4GHz Antenna Circuit with Splitter & Lightning Suppressor - B

AT-WL2411

Access Point

AT-WL2411

Access Point

2.4GHz or 900MHz Antenna with

N Receptacle Connector

2.4GHz Antenna with N Receptacle

Connector

AT-INT067265-00

Adapter Cable - 1’

(30cm)

AT-INT069886-00 Cable - MMCX

AT-INT069887-00 Cable - Radiall

AT-INT069888-00 Cable - Kit,

Bracket, Mtg.

AT-INT064616-00 Cable - 2.5’(76cm)

AT-INT063245-00 Cable - 5’(152cm)

AT-INT063246-00 Cable - 20’(610cm)

AT-INT071179-00 Cable - 30’(914cm)

AT-INT064616-00 Cable - 2.5’(76cm)

AT-INT063245-00 Cable - 5’(152cm)

AT-INT063246-00 Cable - 20’(610cm)

AT-INT071179-00 Cable - 30’(914cm)

Splitter

AT-INT063198-00

Splitter, 2.4GHz or

AT-INT069304-00

Splitter, 900MHz

AT-INT063198-00

Splitter, 2.4GHz

www.alliedtelesyn.com

Antenna Installation/Preparation Guidelines

The AT-WL2411 Access Point features antenna diversity, which means that two antennas can be attached to a single radio.

The antenna ports on the radio card are marked | and ||.

Port | is the send/receive port; port || is the receive-only port. (Note that the antenna diversity system uses only one antenna

at a time.) If you attach only one antenna to the AT-WL2411 Access Point, you must attach it to Port |.

If you are using two antennas for one AT-WL2411 Access Point, placement of the antennas is critical because each

antenna has a particular function. Antennas placed too close together may cause interference with each other. Antennas

placed too far apart may not be able to establish two-way communications with other radios. To achieve optimum

placement for the two antennas, you must place the transmit/receive antenna so that it is within range of all the radios

that the receive-only radio can hear.

Note these important points about antenna placement for an AT-WL2411 Access Point:

●Use external antennas to achieve the recommended antenna separation for placement of either omni or directional

antennas.

●Position directional antennas so they point in the same direction.

●Follow the recommended antenna separation precisely when using the closest distances. Movement of as little as 3.05

centimeters (1.2 inches) may strongly affect performance.

●Position the antennas so that both antennas are within range of the radios they need to communicate with.

●Do not position the two antennas around a corner or so that a wall is between them.

The recommended antenna separation is listed in the following table. You should choose the greatest distance possible

within the constraints of your environment.

Location Recommended Antenna Separation

Highly reflective warehouse environment 0.33 m (13 in) or 0.64 m (25 in)

Moderate reflective warehouse environment 0.64 m (25 in), 1.22 m (4 ft), or 1.83 m (6 ft)

Open/Office environment 1.22 m (4 ft) to 3.05 m (10 ft)

Configuration Example

Wireless Access Point

AT-WL2411

Antenna

AT-INT063363-00 AT-INT063365-00

AT-INT063366-00 AT-INT065349-00

AT-INT067262-00 AT-INT067236-00

AT-INT071121-00 or AT-INT071122-00

Extension cable

AT-INT064616-00 (2.5’coax cable)

AT-INT063245-00 (5’coax cable)

AT-INT063246-00 (20’coax cable)

AT-INT071179-00 (30’coax cable)

Radiall - N Plug Adapter

AT-INT069887-00

Power over Ethernet Splitter

AT-INT071581-00

Power over Ethernet

1, 6, or 12-port Power Over Ethernet Module

AT-INT071620-00 AT-INT071578-00 or

AT-INT071579-00

** requires AT-INT071581-00 PoE Splitter

CAT-5 cable to switch

Mounting bracket

AT-INT069888-00

Lightning Suppression

To add lightning suppression, add

AT-INT061868-00 and a short extension

cable, i.e. AT-INT064616-00. The lightning

suppressor is used to connect the short

extension cable and another extension cable.

Andere Handbücher für AT-WL2411

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