OTC Wireless ACR-201 manuale d’uso

i WiFi Wireless Ethernet Adapter AirEZY-2411-BT (ASR-102/ACR-201) User Guide[...]

ii AirEZY 2411 BT (ASR-102/ACR-201) Wireless Ethernet Adapter User’s Manual Copyright Information in this document is subjec t to change without not ice. Complying wit h all applicable copyright laws is the res ponsibility of the user. No part of this document may be reproduced or transmitt ed in any form or by any means, electronic or mechanical[...]

iii Table of Contents AirEZY-2411-BT (ASR-102/ACR-201) User’s Manual Chapter 1 INTRODUCTION 1 Data Sheet 2 Chapter 2 INSTALLATION 3 Installing the Hardware 3 Power 3 Ethernet connection 3 Status LEDs 3 Optional Hardware 5 Installing the Utility Software 6 System Requirement 6 Installation 6 Chapter 3 UTILITY SOFTWARE 7 Use the Utility Program 7 O[...]

1 Chapter 1 INTRODUCTION AirEZY-2411-BT is an 802. 11b compliant, or WiFi, radio with a 10-BaseT interface. Two features separate AirEZY- 2411-BT from many other 802.11b-compliant radios. Firstly, this 802.11b-compliant (WiFi) radio can be configured as either a Station (ACR-201) or an AP (ASR-102). Secondly, when configured as a Station, the 10-Ba[...]

2 AirEZY-2411-BT (ASR- 102/ACR-201) WiFi Radio Specifications Model AirEZY-24 11-BT Standard 802.11 and 802 .11b Host Interf ace Ethernet, 802.3, RJ-45 receptacle Frequency 2.4GHz – 2.49 5GHz RF Channels 11 channels ( US, Canada), 13 channels (Europe), 13 channels (Ja pan) Transmission power 14dBm at antenna in put typica l Receiver sensitivity -[...]

3 Chapter 2 INSTALLATION Installing the Hardware Power This radio is capable of pulling power from either an AC adapter (supplied with the standard purchase) that plugs into a wa ll outlet or from the USB or the PS2 port of a notebook computer through special adapter cables (call OTC to find out more about these optional cables), or through a batte[...]

4 in the shipment. Power on the AirEZY 2411 BT, the LEDs on the front panel should exhibit the following patterns: LED Color Light Blinking Pattern ON RED Steady on RX GREEN Steady on TX RED on, when transmitting RF signal LINK YELLOW Flickering when comm unicating over the Ethernet port; steady-on when Ethernet connection is absent If the yellow L[...]

5 Three installation examples are shown below. Optional Hardware Radio with externally mount ed antenna (ASR-102E/ACR-201E) Power over Ethernet: DC-injector and dc-extractor 9V adapter if up to 120-ft long CAT-5 cable is used 12V adapter if up to 240-ft long CAT-5 cable is used USB power cable PS2 power cable Power drawn from the USB Ethernet Adapt[...]

6 Installing the Utility Software System Requirements To use the AirEZY-2411-BT Wireless Ethernet Adapter’s utilit ies software, your computer must meet the follo wing minimum requirements: Windows® 95 (OSR2)/ 98 (SEC)/ME/2000/XP Ethernet capable computer with RJ-45 port (either built-i n or add-on NIC) Installation To install the utility pr ogr[...]

7 Chapter 3 UTILITY SOFTWARE Use the Utility Program Once the radio is properly turned on an d connected either directly to the computer running t he Utility program or to a port on the same subnet, the Utility is ready for use. To start the Utility program from your Microsoft Windows, click “Start”, then “P rogram”, move to locate the “A[...]

8 Configure AirEZY-2411-BT as an Access Point (ASR-102) By checking the “Change Role to AP” (r ed-arrowed in screen-shot #3), most parameter fields become undimmed and modifiable, as se en in screen-shot #3 . With the exception of the “MAC” field, and sometimes the “Allowed Station List” field, each filed can be m odified and uploaded i[...]

9 Each field on this “Access Point” sub-tab is explained below. Device Name: Allows the user to enter a use r- defined name for the radio. Up to 32 bytes can be used. MAC: Displays the MAC address of the radio when it is configured as an AP. This filed cannot be modified. SSID: Service Set Identity is used by a station radio when issuing Associ[...]

10 exactly the same SSID as the SSID entered in this sub-tab. The tightest level of network access control is implemented in Level 3, [Hide SSID, Match SSID, Use Allowed List] , add one additional criterion for a Station to gain access to the network associated with this AP—it s MAC address m ust appear in the “ Allowed Station List ” (see be[...]

11 system” mode. When the “shared key” option is chosen, the “Encryption” tab of the Utility program must be properly filled out. Fragmentation Threshold: In the presence of hostile RF environment, such as interference, frames longer than this thre shold numbers in bytes are divided prior to transmission into one or more fragm ents equal [...]

12 Configure AirEZY-2411-BT as a Station (ACR-201) Click on the “Station” sub-tab to display the “Station” page if the “Access Point” page is on top after clicking the “Configuration” tab. Similar to the case of configuring the radio for AP, checking the “Change Role to Station” undims the page and makes most fields modifiable. [...]

13 PS Mode: Power Saving can be enabled only w hen “Infrastructure” is select ed for the “Network Type”. Channel: This field is modifiable only when the “Ad hoc” type is selected for “Network Type”. The Station automatically scans for the right channel to join when operated in the “Infrastructure” m ode. In the “Ad hoc” mode[...]

14 applied to other Wi-Fi radios, however, may re sult in very different keys. For this reason, clicking the Apply button after entering the pass-phrase will caus e the 4 sets of keys being temporarily displayed under “Manual Entry” as if they were entered manually. (See screen-shots #9 and #10, the display in screen-shot #10 is dimmed and not [...]

15 of the default keys for transmitting its data. When Use Dynamic WEP Key is checked, only 3 default keys are available for selection (Screen Shot #11). Note that once the Dynamic WEP Key is in force, the Transmission Key Selection (Screen Shot#12) made by the user is only used in the authentication process and is irrelevant in the encryption of t[...]

16 transmitted data packets. “Signal Strength” directly measures the amount of RF energy received relative to a “maximum” expected for the best condition. The two measures are related, but could differ due to various reasons. In general, as a first step toward maximizing Link Quality, one should try to maximize the Signal Strength by moving[...]

17 Notice also that in this manual mode th roughputs in Bits/Sec are not calculated due the imprecise timing. Uninstall the Utility Software If you need to uninstall the Utility softwar e for any reason, complete the following steps: 1. Close all programs that are currently running. 2. Click the Window Start button, point to Settings and then click[...]

18 Chapter 4 TROUBLESHOOTING Blank Pages Appear When Open the Utility Program This is either because the radio is extr emely busy on the RF side or because the Ethernet connection is problematic. Try to hit the Refresh button a few times. If the blank-page condition persists, it is unlik ely that t he problem is caused by a busy radio. Check your E[...]

19 • Make sure that the MAC address of the Station in question is properly entered into the “Allowed Station List” of the AP if enhanced security level 3, [Hide SSID, Match SSID, Use Allowed List] , is chosen. • Make sure that the Station in ques tion has exactly the same SSID as the AP if enhanced security level 2 or 3 is chosen. • Make [...]

20 • Make sure that the radio is not surrounded by many strongly reflecting (metallic) surfaces. With multiple refl ecting surfaces between the radio in question and the target radio, a severe “ multi-path ” problem may introduce high bit error rate despite a strong “Signal Strength”. • Make sure that there is not a condition of severe [...]

21 Appendix A: LIMITED WARRANTY Wireless LAN Hardware The seller warrants to the end user (“Cus tomer”) that this hardware product will be free from defects in workmanship and materials, under normal use and service, for one (1) year from the dat e of purchase from the seller or its authorized reseller. The seller’s sole obli gation under thi[...]

22 Appendix B: REGULATORY COMPLIANCE FCC Part 15 Declaration of Conformity (DoC) The following equipment: Product Name: Wireless Ethernet Adapter Model Number: AirEZY-2411-BT WLAN is herewith confirmed to comply with the requirements of FCC Part 15 rules. The operation is subject to the following two conditions: 1. This device may not cause harmful[...]

23 European Community (EC) Directi ves Conformity and Restrictions This product is in conformity with the protection requirements of EC Council directives 89/336/EEC, 73/23/EEC, and 1 999/5/EC on the approximation and harmonization of the laws of the Member States relating to electromagnetic compatibility, safety of electrical equipment designed fo[...]

24 GLOSSARY 10BaseT An IEEE standard (802.3) for operat ing 10 Mbps Ethernet networks (LANs) with twisted pair cabling and a wiring hub. Access Point An internetworking device that seamlessly connects wired and wireless networks. Access Points combin ed with a distributed system support the creation of multiple radio cells t hat enable roaming thro[...]

25 Hidden Node The situation where two or more radios in a multiple-radio network fail to detect the RF signals from each other. For example, in a 3-radio network, radio 2 and 3 both have good link to ra dio 1. Radio 2 and 3, however, are isolated from each other by, say, a meta l wall. Radio 2 therefore is a “hidden node” to radio 3, and vice [...]

26 PCMCIA Personal Computer Memory Card International Association . Th is Association develops standards for PC card s, formerly known as PCMCIA cards. These cards are available in three ty pes, and are about the same length and width as credit cards. However, the diffe rent cards range in thickness from 3.3 mm (Type I) to 5.0 mm (Type II) to 10. 5[...]