OTC Wireless ACR-201 User's Manual
Contents
1. e Make sure that the Signal Strength indicator on the Link Info tab is not zero A minimum of 20 is recommended If the Signal Strength is less than 20 the distance between the AirEZY 2411 BT and the targeted radio an AP or another Station may be too far Decrease the distance to see if the radio link can be established e Make sure that the AirEZY 2411 BT is set up as a Station not an AP e Make sure that the SSID is any or the same as that for the Access Point if operating in the infrastructure mode or the same as that of the other Stations if operating in the Ad Hoc mode e Make sure that all the access controls are satisfied if operating in an infrastructure mode i e connecting to an AP For example is the MAC address of the host computer device of the AirEZY 2411 BT Station entered in the AP e Make sure that the encryption keys are entered correctly if WEP is enabled e Make sure that there is no RF interference present in the radio network No Radio Link When Set Up As an AP ASR 102 If the AirEZY 2411 BT is set up as an AP but one or more target Station radios cannot link with it check the following QTC a 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 question has exactly the same SSID as the AP2. add on NIC Installation To install the utility program simply insert the CD ROM provided and the installation process will finish with you clicking a few OK The installation copies the Utility program and its run time support components of Visual Basic onto the host computer without altering any settings of the host computer Notice that the operation of the AirEZY 2411 BT is independent of the Utility Program Therefore it is NOT necessary to install the Utility on the network device computer that you plan to install the AirEZY 2411 BT For example if you plan to connect a printer server wirelessly to the network with the AirEZY 241 1 BT you do not need to have the Utility Program installed on the printer server you will not be able to In this example you configure the AireEZY 2411 BT as a Station on a PC installed with the Utility Program disconnect it from the PC then connect it to the printer server While the Utility program must run on a computer equipped with Microsoft Windows the radio can operate with computers devices of any OS Also notice that to configure or monitor the radio with the Utility program the computer running the Utility program can be either directly connected to the radio or connected to the same subnet the radio is connected to QTC Chapter 3 UTILITY SOFTWARE Use the Utility Program Once the radio is properly turned on and connected either directly to the computer running the Utili
3. are not calculated due the imprecise timing Uninstall the Utility Software If you need to uninstall the Utility software 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 the Control Panel 2 Double click the Add Remove Programs icon 3 Click the AirEZY 2411 BT This will uninstall the utility program from your computer OTC 17 Chapter 4 TROUBLESHOOTING Blank Pages Appear When Open the Utility Program This is either because the radio is extremely busy on the RF side or because the Ethernet connection is problematic Try to hit the button a few times If the blank page condition persists it is unlikely that the problem is caused by a busy radio Check your Ethernet connection Make sure you use at least a legitimate CAT 3 cable but preferably a CAT 5 Make sure that it is a straight through cable between the radio and the computer or a crossover cable between the radio and the hub if a hub is involved Check to make sure that the Ethernet card of the computer running the Utility program is functional No Radio Link When Set Up As a Station ACR 201 If the AirEZY 2411 BT is intended to function as a Station but the Link Quality indicator on the Link Info tab shows 0 check the following possible causes e Make sure that a target radio an AP or another Station is turned on and operating properly
4. ext a Obtain Link Information Lay Wireless Ethernet Adapter Mi Ea Lay Wireless Ethernet Adapter ME Ea OTC Wireless LAN Management Utility OTC Wireless LAN Management Utili Link ina stasis About Link info clas About Device Device Device Mame OTE 802 11b6 Ethernet Device Name OTC 802 116 Ethernet Firmware wersion 01 01 18 Date 05 28 02 Firmware wersion 01 01 18 Date 05 28 02 Curent Status Role Current SSID AnE2 72411 AnE2 72411 Port Status Connected to E55 Current Channel 5 5 Beacon Interval 100 Kus Beacon Interval 100 Kus Curent Tx Aate 2 Mbps Link Quality 100 Excellent TT TTT TTT EL Signal Strength 100 Excellent TTT TTT TTT Screen shot 13 Fetesh ke Exit only Screen shot 14 etezh TK Exit onl This page provides an overview of the setup of the radio The Device field displays the Device Name assigned to the radio and the firmware installed The Current Status field displays the few configuration parameters most pertinent to setting up a WiFi link In addition if the radio s role is Station the Link Quality and Signal Strength are automatically retrieved from the radio and displayed every 2 seconds Link Quality measures the percentage of accurately OTC 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 r
5. from 3 3 mm Type I to 5 0 mm Type II to 10 5 mm Type III These cards can be used for various functions including memory storage landline modems and wireless modems PS Mode Power Save Mode This mode is recommended for devices where power consumption is a major concern such as battery powered devices Radio Frequency RF Terms GHz MHz Hz The international unit for measuring frequency is Hertz Hz equivalent to the older unit of cycles per second One megahertz MHz is one Million Hertz One gigahertz GHz is one Billion Hertz The standard U S electrical power frequency is 60 Hz the AM broadcast radio frequency band is 0 55 1 6 MHz the FM broadcast radio frequency band is 88 108 MHz and wireless 802 11 LANs operate at 2 4GHz SSID Service Set ID A group name shared by every member of a wireless network Station The Station is the component that connects a host computer or device to the wireless medium It may be referred to as the Wireless Network Adapter or the Wireless Network Interface Card WEP Wired Equivalent Privacy The optional cryptographic confidentiality algorithm specified by 802 11 used to provide data confidentiality that is subjectively equivalent to the confidentiality of a wired LAN medium that does not employ cryptographic techniques to enhance privacy OTC 26
6. host computer Poor Link Quality If the Signal Strength is reasonably high gt 20 and the Link Quality is not zero but the Link Quality stays in the Poor range it could be due to one of the following reasons Make sure that radio interference is not present in the radio network OTC i Make sure that the radio is not surrounded by many strongly reflecting metallic surfaces With multiple reflecting 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 packet collision caused by a hidden node problem A hidden node problem is the situation where the RF signal from two or more Station radios cannot reach each other but can reach the AP In such situation multiple Stations may attempt to transmit data packet to the AP at the same time and therefore cause packet collision To solve this problem either re arrange the Stations in question such that the RF signals are mutually sensible by all Stations or turn on the RTS CTS protocol by setting the RIS threshold on the Station sub tab to a reasonably small value 500 for example There is no guarantee that the packet collision can be entirely eliminated by invoking RTS CTS protocol but the severity can be reduced enough to see visible improvement of the link quality Radio Interf
7. if enhanced security level 2 or 3 is chosen Make sure that the Station in question has exactly the same WEP keys as the AP Special attention should be paid to this item if pass phrase is used to generate the WEP keys and the Station radios in question are NOT an AirEZY 2411 BT No Network Connection While the Radio Link is Good If the Link Quality indicator shows good link quality on the Link Info tab but the host computer device cannot be connected to the network Make sure that the Yellow LED on the radio is NOT constantly ON If it is Ethernet connection is questionable Make sure the Ethernet Adapter of the host computer device is properly installed Make sure that the UTP cable connecting the radio and the host device meets at least the CAT 3 standard and has a Straight through connection not a Cross over Make sure that the AirEZY 2411 BT when set up as a Station is not connected to a hub with multiple computers devices plugged in Make sure that the IP address of the host computer device is properly set up for the network Make sure that the host computer device has initiated some packet traffic since the radio was turned on That is the failure of the network connection is not just determined by trying to access the host from a remote point in the network Reset or re power the host with the AirEZY 2411 BT turned on may be necessary in order for the AirEZY 2411 BT to learn the MAC address of the
8. interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try and correct the interference by one or more of the following measures Relocate your WLAN equipped laptop computer Increase the separation between the WLAN equipped laptop computer and other electronics Connect the WLAN equipped laptop computer into an outlet on a circuit different from that of other electronics Consult the dealer or an experienced radio TV technician for help FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment This equipment should be installed and operated with minimum distance of 20cm between the radiator amp your body Caution Changes or modifications not expressly approved by OTC Wireless could void the user s authority to operate the equipment This transmitter must not be co located or operating in conjunction with any other antenna or transmitter OTC European Community EC Directives Conformity and Restrictions This product is in conformity with the protection requirements of EC Council directives 89 336 EEC 73 23 EEC and 1999 5 EC on the approximation and harmonization of the laws of the Member States
9. open space Support both the ad hoc mode and the infrastructure mode Support the standard 64 bit WEP and the optional 128 bit WEP Support User enabled Dynamic WEP key generation and distribution Selectable levels of access control SSID hidden in beacon exact SSID match and MAC address based allowed list password protected AP configuration Output SV 2 6A Input 100 120V 50 60Hz 1 0A max lt 480mA max reached in transmit mode 4 Power Transmission Receiving Link Ethernet connection 10 C 50 C FCC part 15 Class B CE OTC 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 wall 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 battery pack Power can also be supplied to the AirEZY 2411 BT over the Ethernet cable with the used of an optional dc extractor box near the radio and an optional dc injector at the NOC side This scheme is particularly useful when AirEZY 241 1 BT is deployed as Access Point at a location without an installed AC outlet Ethernet Connection When configured as a Station i e ACR 201 the AirEZY 2411 BTcan be connected to a computers or a printer servers Ethernet port via the included Straight through UTP cable Please note that as dictated by the
10. runs self sufficiently without the aid of any driver program in the host computer connected to the radio This Utility program therefore is intended to be in most cases just a tool for the network operators An end user simply plugs the pre configured radio into a host computer or a network device equipped with a RJ 45 receptacle without ever being expose to this Utility program The Utility program is simple to install and easy to use through its graphic user interface The details are described in Chapter 3 QTC AirEZY 2411 BT ASR 102 ACR 201 WiFi Radio Key Features O Highest degree of security provided by Dynamic WEP encryption key distribution QO Configurable as either an Access Point or a Station O Plug amp Play as a Station o No driver on the host device is required for radio operation o Radio operation is independent of the operating system on the host device Windows 98 2000 ME Linux Unix embedded etc as long as an Ethernet port is properly supported a Simple effective and user selectable network access control methods as an AP O Industry standard IEEE 802 11b compliant wireless interface Interoperable with AP and Client radios from other vendors WiFi certified O Ethernet 802 3 compliant host interface to enable true Plug amp Play a 11Mbps data rate and automatic selection of lower data rate 5 5 2 and 1 Mbps in degraded RF environment O Integrated omni directional antenna to provide best tradeoff betwee
11. sure that a straight through cable is used for connecting directly to a host A cross over UTP cable is needed if connecting to a hub If the yellow LED is not lit and power is on to the device then the Ethernet connection between the host computer and the Wireless Ethernet Adapter is correct If one cannot communicate and the yellow LED is off you may want to re position the AirEZY 2411 BT to a different location for better RF reception You may also want to check if the unit is configured with the proper RF channel and security settings by using the Utility software Once the hardware is checked out to work properly with the intended host device or network equipment the radio can be secured in the desire location by the pair of Velcro tabs OTC Three installation examples are shown below Se Ethernet Adapter f 5 E ol ea ai from the USB 9 Optional Hardware Radio with externally mounted 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 OTC Installing the Utility Software System Requirements To use the AirEZY 2411 BT Wireless Ethernet Adapter s utilities software your computer must meet the following minimum requirements Windows 95 OSR2 98 SEC ME 2000 XP Ethernet capable computer with RJ 45 port either built in or
12. 64 Bit 125Bit Disabled f 64 Bit f 128 6it Disabled To enable encryption Shared Fey must De selected for the To enable encryption Shared Fey musi be selected for the Agthentication Cations on the Config tab Authentegtion Options on the Config tab Use Dynamic WEF Rey Jf Use Dynamic WEP Key To fave maximum Secuii select ievel 3 for Enhanced Sec TO have MAINAN Sectii select level 3 for Enhanced Sec on the Access Point config supbigh on the Access Point config sutige Dery Unencrpted Data Dery Unencrpted Data Default WEP Key Entry Default WEP Key Entry Create with Bealls Create with possi passphrase i Manual Entry PPP PEPE PPP Ee i a a a a a a a a a aeaa EEEEEREFFFFFE Transmission Ket WEP kep factor Every 100 frames vee a factor TE seer TIL IM reuse Screen Shot 9 efresh OK Exit Apply I Screen Shot 10 piresh ok Ext Apply scheme A set of four keys needs to be created in the default key scheme There are two ways of generating the four keys Choosing Create with Pass Phrase and entering a pass phrase causes the radio to generate the default keys following a set algorithm the same pass phrase applied to another AirEZY 2411 BT radio will generate an identical set of default keys The same pass phrase OTC 13 applied to other Wi Fi radios however may result in very different keys For this reason clicking the button after en
13. 802 11 standards only one MAC address can be supported by a Station radio As a result an AirEZY 2441 fi BT configured as a Station will not function properly when connected to a hub plugged in with multiple computers network devices So as a rule straight through cable is always used to connect an AirEZY 2411 BT Station to a computer or a network device 5 aicht through UTP x When configured as an Access Point i e ASR 102 the AirEZY 2411 BTcan be connected to a server computer a hub a switch or a router A straight through cable must be used when connecting to the Ethernet port of a server computer a cross over cable however must be used when connecting to a hub a switch or a router Status LEDs Connect the 10BaseT port which resembles an over sized telephone jack on the bottom panel of the AirEZY 2411 BT to the 10 BaseT port in the client computer or computing device using the 3 ft straight through UTP cable included 3 WIRELESS 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 communicating over the Ethernet port steady on when Ethernet connection is absent If the yellow LED stays on continuously then the Ethernet connection to the host computer or device is not made Check your UTP cable and make
14. List jE ee IE has been chosen as the access control rale method When Level 3 Hide SSID Access Point Match SSID Use Allowed List is a ceo _Change Password selected the Add the Delete and the Device Name OTC 802 11b Ethemet Exit buttons below the Allowed List o j SSID Ir panel become undimmed and 3 selectable Screen shot 6 An input Enhanced Sec 3 Hide SSID Match SSID Use Allowed List box screen shot 7 for entering the Freret Rate it Mbps z Allowed Station List MAC address of a Station to be allowed mer Option SharedKey 000304055565 to join the network appears when the smeveten Theshod asse button is clicked Type in the MAC AS ties le TT address and click the button the Channel E 2432Mhz x newly added MAC address should eseas TT Wes appear in the list As usual the Apply a Ue T button needs to be clicked before this addition truly takes effect To delete a Screen shot 7 _ Petes OK Em am MAC address from the Allowed Station List simply highlight the MAC address and click the button Clicking on the Exit button right after either the Add cathe De ete action but before pressing the Apply button will cancel either the Add or the action Note that if the Station radio is a Wireless PCMCIA Card or a Wireless USB Adapter the MAC address is directly associated with the Card or the Adapter The MAC addresses can be either read off the labels on the Card Ada
15. OTC WIRELESS WiFi Wireless Ethernet Adapter AirEZY 2411 BT ASR 102 ACR 201 User Guide OTC AirEZY 2411 BT ASR 102 ACR 201 Wireless Ethernet Adapter User s Manual Copyright Information in this document is subject to change without notice Complying with all applicable copyright laws is the responsibility of the user No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without the express written permission of the seller If however your only means of access is electronic permission to print one copy is hereby granted The seller provides this documentation without warranty term or condition of any kind The seller may make improvements or changes in the product s and or the program s described in this documentation at any time Other product and company names herein may be trademarks of their respective owners Copyright 2001 2002 OTC Wireless Inc All rights reserved Revision v1 13 10 15 2002 QTC Table of Contents AirEZY 2411 BT ASR 102 ACR 201 User s Manual Chapter 1 INTRODUCTION Data Sheet Chapter 2 INSTALLATION Installing the Hardware Power Ethernet connection Status LEDs Optional Hardware Installing the Utility Software System Requirement Installation Chapter 3 UTILITY SOFTWARE Use the Utility Program Overview of the Tabs Configure AirEZY 2411 BT Configure AirEZY 2411 BT as an Access Point AS
16. R 102 Configure AirEZY 2411 BT as a Station ACR 201 Set up the Encryption Obtain the Link Information View the Packet Statistics Uninstall the Utility Software Chapter 4 TROUBLESHOOTING Blank Pages Appear When Open the Utility Program No Radio Link When Set Up As a Station No Radio Link When Set Up As an AP No Network Connection While the Radio Link is Good Poor Link Quality Radio Interference Technical Support Appendix A LIMITED WARRANTY Wireless LAN Hardware Wireless LAN Software Appendix B REGULATROY COMPLIANCE GLOSSARY QTC N e ODD OWW WW QW ili 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 BaseT interface affords it a true plug and play feature that is unavailable from any other 802 11b Station radios are based on either a PCMCIA or a USB interface and require the installation of a driver on the host computer This driver less feature also means that the operation of the radio is OS operating system independent When configured as a Station i e ACR 201 the driver less feature enables wireless connectivity for any computing devices systems installed with any OS Operating system as long as an Ethernet
17. access control method used by the 802 11 standard Basically a radio can start transmitting signal only when no carrier from another radio is sensed and after a randomized wait time has expired DTIM Delivery Traffic Indication Map The Stations that currently have data held in an AP are identified by a Traffic Indication Map TIM This TIM is included in the beacon sent by an AP DTIM is a special type of TIM When a DTIM is sent in a beacon frame it signals that all the broadcast and multicast data held for Stations in PS mode will be sent immediately following the beacon frame Encapsulated An Ethernet address mode that treats the entire Ethernet packet as a whole and places it inside an 802 11 frame along with a new header ESS Extended Service Set A set of one or more interconnected Basic Service Sets BSSs and integrated Local Area Networks LANs can be configured as an Extended Service Set Ethernet The most widely used medium access method which is defined by the IEEE 802 3 standard Ethernet is normally a shared media LAN i e all the devices on the network segment share the total bandwidth Ethernet networks operate at 10Mbps 100Mbps using CSMA CD to run over 10BaseT 100BaseT cables QTC i 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 radio 1 Radio 2 and 3 however are isol
18. agmentation Threshold 2346 RTS Threshold 2432 Channel E 2432 Mhz Beacon Interval 1100 Kus OTIM Pernod fio Eda Screen Shot 2 fresh Of Exit Apply belete La Wireless Ethernet Adapter OTC Wireless LAN Management Untlit en er iv Change Role to AP Device Mame OTC 802 11bEthemet ac fio ao OE FS aa SSID AEZ Enhanced Ser 3 Hide SSID Match SSID Use Allowed List Transfer Rate 17 Mbps Allowed Station List Authentication Option SharedKey gt 003204056666 Fragmentation Threshold 3346 ATS Threshold paz Channel 5 2432 Mhz Beacon Interval 1100 Kus OTIM Period fio Screen Shot 3 eftesh Config pee Point Change Password Add Delete Cancel OF E wit Apply parameter fields become undimmed and modifiable as seen in screen shot 3 With the exception of the MAC field and sometimes the Allowed Station List field each filed can be modified and uploaded into the radio by clicking the button without exiting the program or by clicking the button right before exiting the program This uploading action however is password protected A password challenge screen upper portion of screen Input pazzword Ok Cancel uploading Screen Shot 4 a _ The Password ie not corect please try agin Change Password The password that protects the Access Point settings can be changed by click
19. ated from each other by say a metal wall Radio 2 therefore is a hidden node to radio 3 and vice versa Since an 802 11 network relies on the CSMA CA protocol to control network access hidden nodes break down the Carrier Sensing mechanism of controlling medium access because two or more radios cannot sense the carrier from each other IEEE 802 11 The IEEE 802 xx is a set of specifications for LANs from the Institute of Electrical and Electronic Engineers IEEE Most wired networks conform to 802 3 the specification for CSMA CD based Ethernet networks or 802 5 the specification for token ring networks 802 11 defines the standard for wireless LANs encompassing three incompatible non interoperable technologies Frequency Hopping Spread Spectrum FHSS Direct Sequence Spread Spectrum DSSS and Infrared IEEE standards ensure interoperability between systems of the same type Infrastructure Network A wireless network centered about an Access Point In this environment the Access Point not only provides communication with the wired network but also mediates wireless network traffic in the immediate neighborhood IP Internet Protocol The standard protocol within TCP IP that defines the basic unit of information passed across an Internet connection by breaking down data messages into packets routing and transporting the packets over network connections then reassembling the packets at their destination IP corresponds to the network
20. ations yet to associate with it This field specifies how frequently the beacon packet is sent The default value is 100 mSec For a relatively fixed network where Stations roaming in and out is infrequent the interval can be long to minimize the overhead usage of the bandwidth DTIM Period An Access Point generates a Traffic Indication Map TIM to identify the Stations that have data buffered inside the AP The TIM is included in the Beacon sent out by the AP A Station determines that data packets are buffered for it by the AP and takes appropriate actions by listening to the beacon and interpreting a TIM A special delivery TIM DTIM is used to signal that broadcast multicast frames buffered at the AP will be sent immediately following the beacon that contains the DTIM This is necessary only when the AP detects that at least one of the Stations associated to it is in the Power Save PS mode DTIM period is measured in terms of beacon intervals The default setting is 10 beacon intervals This means one out every 10 beacons sent by the AP contains DTIM If prior Knowledge is available that Stations in a particular network rarely uses the PS mode a high value for DTIM Period should be entered to minimize the overhead usage of the bandwidth OTC 11 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 eae EENET MNE
21. communication port is available Ethernet equipped workstations in a corporate environment for example benefit greatly from this driver less feature the IT workforce has one less driver to worry when upgrading an OS or when salvaging an OS crash Special computing networking devices such as printer servers POS point of sales machines may not even have an easy way of installing a driver for a radio When configured as an AP i e ASR 102 AirEZY 2411 BT offers a no frill seamless way of fitting a wireless network into an existing wired LAN infrastructure It does not even require the assignment of an extra IP address Existing wired network resources such as DHCP VPN firewall etc reach across the ASR 102 to the client workstations with total transparency Unlike many other 802 11b APs on the market which offer network functions that are duplicative to the existing network this AP simply wirelessly collects a group of workstations or other kinds of computing devices into the existing network just like a hub AirEZY 2411 BT has a compact form factor that blends easily into a home office environment It also lends particularly well to portable applications The specifications are given on the next page A Utility program is needed to pre configure AirEZY 2411 BT prior to putting the radio in operation And the Utility program can be used to monitor the communication condition once the radio is in operation Once configured the radio
22. data frame size such that no frames are ever fragmented RTS Threshold To minimize the potential packet collision associated with hidden nodes in a wireless network 80211 standard has the option to complete a Request to Send RTS and Clear to Send CTS two frame exchange prior to sending the real data This obviously reduces the throughput of the real data Since the probability of packet collision increases with the size of the packets transmitted an optimum trade off between data throughput and data integrity may be reached by turning on the two frame exchange only for data packets exceeding a certain size The number entered in this field is that threshold packet size in Bytes For example if 500 is entered data packets with sizes less than 500 bytes are transmitted without being preceded by the RIS CTS exchange and thereby taking a small risk of getting corrupted by packet collisions If 2346 the maximum 802 11 data frame size or a larger number is entered then every data packet is transmitted without being preceded by the RTS CTS exchange and thereby maximizing the data throughput Channel Click on the arrow and highlight the desired frequency channel for the radio network A minimum of 20MHz separation from the frequency of an adjacent AP is required Beacon Interval An Access Point periodically sends out Beacon packets to broadcast information for the Stations already associated with the AP or for St
23. ducts will be corrected For any third party products listed in the seller software product documentation or specifications as being compatible the seller will make reasonable efforts to provide compatibility except where the non compatibility is caused by a defect in the third party s product or from use of the software product not in accordance with the seller s published specifications or user manual QTC a 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 interference and 2 This device must accept any interference received including interference that may cause undesired operation FCC ID MKZAZY2411BT FCC Rules and Regulations Part 15 Warning This device has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the Federal Communications Commissions Rules and Regulations These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful
24. elated 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 the radio around If the radio s role is AP the Link Quality and Signal Strength are not displayed Screen Shot 14 View Packet Statistics In addition to the Link Quality on the Link Info tab which is available only Lai Wireless Ethernet Adapter Oy x Lay Wireless Ethernet Adapter Mi Ed OTC Wireless LAN Management Uth OTC Wireless LAN Management Utili Statistics Statistics Link Info Config Encryption Statistics of 802 11 Port Statistics of 802 11 Port Attribute Name Total Transmitted Frames 1 Total Tranemitted Retry Frames 0 Total Transmitted Octets 109 Total Received Frames 102 Total Received Error Frames 281 Total Received Octet 4488 Attribute Hame Total Transmitted Frames Total Transmitted Retre Frames Total Transmitted Octets Total Received Frames Total Received Error Frames Total Received Octets 27899 Transmitted Trattic Received Traffic 0 KEW Sec 0 176 KBMSec Refresh Tie fio Screen Shot 15 paet when the radio is set as a Station several statistics on the packet frame traffic through the radio either as a Station or as an AP are displayed on the WLAN Statistics tab From the Total Transmitted Frames and the Total Transmitted Retry Frames one can get a picture of
25. erence You may be able to eliminate RF interference by trying the following Find the channel used by the source of the interference and coordinate your network and the interference source to be on channels that are at least 20MHz but preferably 30MHz apart Reseat the AirEZY 2411 BT radio to a location where the interference is minimized in general increase the distance between the wireless computers and the device causing the radio interference Avoid using 2 4GHz cordless phone in the vicinity of the radio Keep the computer with the AirEZY 2411 BI radio away from the microwave oven and large metal objects Consult the dealer or an experienced radio technician for help Technical Support lf problems are still not solved please contact our Technical Support to obtain futher assistance Call 1 800 770 6698 in USA Call 011 510 490 8288 outside of USA E mail techsupport otcwireless com QTC a Appendix A LIMITED WARRANTY Wireless LAN Hardware The seller warrants to the end user Customer that this hardware product will be free from defects in workmanship and materials under normal use and service for one 1 year from the date of purchase from the seller or its authorized reseller The seller s sole obligation under this express warranty shall be at the sellers option and expense to repair the defective product or part deliver to Customer an equivalent product or part to replace the defective item or i
26. ess network associated with it Refer to screen shot 6 a pull down menu is used to select the level Fagmentation Thieshold 235 of network security Level O RTS Threshold 2432 Disabled basically leaves the access Channel E 2432Mhe to the network entirely open Stations Beacon Interval 100 Kuz with any see the section DTIM Period R0 Add Delete Configuration the AirEZY 2411 BT as a Station for more explanations as Screen Shot 6 fletes the SSID for example is allowed to join without any restriction Selecting Level 1 Hide SSID in Beacon causes the AP radio to send beacons without the SSID This minimizes the chance for an eavesdropping radio to capture and utilize the SSID for more damaging intrusion to the network At Level 2 Hide SSID Match exact SSID this AP grants a Station association only when the Station submits in its association request QTC 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 its MAC address must appear in the Allowed Station List see below shown in the lower right corner of this sub tab Allowed Station List The MAC addresses of the Stations in the network need to be entered here if the Level 3 Hide SSID Match SSID Use Allowed
27. f neither of the two foregoing options is reasonably available The seller may in its sole discretion refund to the Customer the purchase price paid for the defective product All products that are replaced will become the property of the seller Replacement products may be new or reconditioned Wireless LAN Software The seller warrants to Customer that each software program licensed from it except as noted below will perform in substantial conformance to its program specifications for a period of one 1 year from the date of purchase from the seller or its authorized reseller The seller warrants the media containing software against failure during the warranty period No updates are provided The sellers sole obligation under this express warranty shall be at the seller s option and expense to refund the purchase price paid by Customer for any defective software product or to replace any defective media with software which substantially conforms to applicable seller published specifications Customer assumes responsibility for the selection of the appropriate application programs and associated reference materials The seller makes no warranty or representation that its software products will meet Customer s requirements or work in combination with any hardware or software applications products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software pro
28. it the most from the use of the Dynamic WEP Key feature Transmission Key Sel Transmission Key Selection One of the 4 default keys needs to be selected for transmitting data frames The radio can de encrypt received data encrypted in any one of the four default keys but it uses only one OTC 14 Lay Wireless Ethernet Adapter JOf x OTC Wireless LAN Management Utility of the default keys for transmitting its 3 Manageme data When Use Dynamic WEP Key is esi Pree Encryption checked only 3 default keys are 64Bit 128Bit C Disabled available for selection Screen Shot enable encryplion E eyes aee selected for the H1 1 N t th t th D Authentication Oetions on the Contig tab i ote at once e Ynamic ic icq Use D ic WEP K WEP Key IS In force the Transmission CAF specail Lah een re for Enhanced Sec Key Selection Screen Shot 12 made on the Access Point config sub tab by the user is only used in the l z boan le eae t t authentication process and is Da i i Create with Passph irrelevant in the encryption of ae See transmitted data Manual Entry KI fit 22 33 aa s ee 77 fes 99 faa fbb foo faa y K2 fad ec ob aa fes foe fez fos fos fas fos fee fi aren 3 ve hia ns j Sere eee eer register for the encryption is changed j The smaller the number is the securer Transmission pj WEP key actor Every 100 frames MW reuse the communication Screen Shot 12 frepesh ok
29. ket from the host computer device after the AirEZY 2411 BT Station is connected in order for the Station radio to capture the MAC address of the host computer device Power off then on or reset the host computer device while the AirEZY 2411 BT Station is actively connected can achieve the same The need of a AirEZY 2411 BT Station to learn the MAC address of the host computer device should be contrasted to absence of such need by a PCMCIA or a USB Station radio In the case of the PCMCIA or USB Station radio higher layer packets such as IP are delivered to the radio without an Ethernet header The PCMCIA or USB radio in conjunction with its driver adds the Ethernet header with a MAC address unique to the radio In the case of AirEZY 2411 BT however the packets delivered to the radio are already fully 802 3 compliant and with an Ethernet header in which the MAC address is that of the Ethernet card of the host computer device If the AirEZY 2411 BT were to encapsulate the Ethernet packet with another header containing a MAC address unique to the radio this header would not have been removed by another target 802 11 compliant radio and therefore would prevent the proper delivery of these packets Network Type Two possible types to select from the Infrastructure type where all Stations communicate through an Access Point AP and the Ad hoc type where all Stations communicate directly with each other QTC PS Mode Power Savi
30. layer in the ISO OSI model IP Address An IP address is a 32 bit number that identifies each sender or receiver of information sent across the Internet An IP address has two parts the identifier of a particular network on the Internet and an identifier of the particular device which can be a server or a workstation within that network ISP nternet Service Provider An organization that provides access to the Internet Small ISPs provide service via modem and ISDN while the larger ones also offer private line hookups T1 fractional T1 etc LAN Local Area Network A communication network that serves users within a defined geographical area The benefits include the sharing of Internet access files and equipment such as printers and storage devices Special network cabling 10BaseT is often used to connect the PCs together NAT Network Address Translation The translation of an Internet Protocol address IP address used within one network to a different IP address known within another network One network is designated the internal network and the other is the external The internal network then appears as one entity to the outside world OTC PCMCIA Personal Computer Memory Card International Association This Association develops standards for PC cards formerly known as PCMCIA cards These cards are available in three types and are about the same length and width as credit cards However the different cards range in thickness
31. n link quality and mobility QO Microsoft Windows based configuration tool Applications Q Standard compliant wireless networking for computers and equipment with an Ethernet interface O Where Plug amp Play is essential O As rental Internet access devices in public space Hotels motels cyber caf airport lounges etc O As rental Internet access devices at trade shows large meetings and other one time events O As shared Internet access devices for visitors to an office a Embedded devices tools instruments equipment and appliances that can benefit from the re configurability of wireless link yet are unfriendly to the installation of device drivers O POS equipment for stores where re configuration is frequent O Control monitor equipment where mobility is required Model Standard Host Interface Frequency RF Channels Transmission power Receiver sensitivity Antenna Data Rate Modulation Link Distance Network Types Data Encryption Network Security AC adapter Current consumption LED Indicators Operating Temperature Regulation Compliance specifications AirEZY 2411 BT 802 11 and 802 11b Ethernet 802 3 RJ 45 receptacle 2 4GHz 2 495GHz 11 channels US Canada 13 channels Europe 13 channels Japan 14dBm at antenna input typical 80dBm le 5 BER typical Dipole antenna with 2dBi gain 11 5 5 2 or 1 Mbps fixed rate or configured to automatic rate selection CCK Direct Sequence Spread Spectrum 1200 ft in
32. ng can be enabled only when Infrastructure is selected 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 mode In the Ad hoc mode the Station also automatically scans for the right channel to join an existing ad hoc Service Set However when the Station is the first station to start an ad hoc network it will stay on the channel selected in this field to wait for other stations to join Set up the Encryption This page allows users to set up the 802 11 Wired Equivalent Privacy WEP to protect the content of the data frames from eavesdropping Encryption Three selections are available The 64 bit encryption is currently the 802 11 standard The 128 bit encryption is supported by equipment from a limited number of vendors Notice that the user controlled portion of the 64 bit encryption is just 40 bits and that for the 128 bit encryption is just 104 bits 3 bytes of the encryption key are internal to the encryption algorithm Default WEP Key Entry AirEZY 2411 BT currently supports only the default shared WEP key scheme defined in the 802 11 standard not the mapped key Lay Wireless Ethernet Adapter Piel Ed Lay Wireless Ethernet Adapter lel OTC Wireless LAN Management Utili OTC Wireless LAN Management Utilit Encryption Encryption C
33. nters such Dery Unencrypted Data creen Shot 11 security hole by generating and a ec a i a distributing fresh WEP keys in time Ae eae intervals less than 12 min This Manual Entry capability is built on top of the default KI fit 22 a3 aa Es fee 77 fee sa faa eb fec Jad key scheme The default keys 64 bit 2 aa Jee bb es 89 es rr ee 5s faa fes 22 rr or 128 bit are still set up in the same manner described above Except that Key 4 is no longer available as a re m N WEP kep factor Every 100 frames m selection for transmission see Transmission Key Sel below The default keys in this situation are only used in the authentication process A Station must respond to an authentication challenge with one of the default keys in the usual manner defined by the 802 11 standards Upon successful authentication the AP uses one of the default keys to send the seed of the Current WEP key the one generated by the AP and has no relation to any of the default keys to the Station From that point on the data exchanged between the AP and the Station are encrypted with this AP controlled WEP key In a time interval shorter than 12 min the seed of a fresh key is sent to the Station encrypted with the Current Key The static default keys are NOT used for data encryption when the dynamic WEP key is enabled Note that the highest level of Access Control Hide SSID Match SSID Use Allowed List should be selected on the AP in order to benef
34. pter or from the utility programs or from the host computers e g ipconfig all in DOS ifconfig in Linux or the Network setting in the Control Panel of Microsoft Windows However if the Station is an AirEZY 2411 BT the MAC address Is NOT the MAC address on the label of the radio it is instead the MAC address of the Ethernet port of the host computer device Tx Rate The RF environment sometimes can be hostile to the highest data rate available to AirEZY 2411 BT That gives rise to the need for trading off between data rate and link robustness The six choices in the pull down list allow the network manager to select that optimum trade off Authentication Option When the open system option is chosen no encryption is applied to the packets exchanged between this Station radio and another radio Communication with another radio a station or an AP however can be successful only if the other radio also is set up to communicate in the open OTC s 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 threshold numbers in bytes are divided prior to transmission into one or more fragments equal in length to the fragmentation threshold The default value is set at 2436 bytes the maximum 802 11
35. r Configuration tab Similar to the case of OTC Wireless LAN Management Utili configuring the radio for AP checking the Config Change Role to Station undims the page and makes most fields modifiable AE peer Device Name OTC 80211b Ethemet mc o E e e SSID areva Network Type Infrastructure Transfer Rate fitMbps gt P5 Mode Disabled Authentication Option SharedKep gt Fragmentation Threshold 2346 RTS Threshold 2432 a Channel 5 2437 Mhz Station Some of the fields on the Station sub tab are identical to those on the Access Point sub tab Please refer to the Access Point section for explanation of these fields Those fields not on the Access Point sub tab and those with a different usage red arrowed items in screen shot 8 are described below MAC This is not a modifiable field When set up as a Station this field displays the Screen Shot 8 fen o ea am MAC address that is unique to the radio immediately after the radio is turned on Once it is connected to a host computer device however the MAC address changes to that of the Ethernet port of the host computer device It this host computer device MAC address that should be entered into the Allowed Station List of an AirEZY 2411 BT Access Point or a WiFi AP with the Allowed Station List feature Notice that it may be necessary to initiate the transmission of a network pac
36. relating to electromagnetic compatibility safety of electrical equipment designed for use within certain voltage limits and on radio equipment and telecommunications terminal equipment Compliance is indicated by the CE marking C This product satisfies the radio spectrum requirements of EN 300 328 1 the EMC requirements of EN 301 489 17 and the safety requirements of EN 60950 OTC 23 GLOSSARY 10BaseT An IEEE standard 802 3 for operating 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 combined with a distributed system support the creation of multiple radio cells that enable roaming throughout a facility Ad Hoc Network A network composed solely of stations within mutual communication range of each other no Access Point connected The Ad Hoc network offers peer to peer connections between workstations allowing communication between computers within range that have an 802 11 DSSS compatible PC card installed BSS Basic Service Set A set of stations controlled by a single coordination function Channel A medium used to pass data units that can be used simultaneously in the same volume of space by other channels of the same physical layer with an acceptably low frame error ratio due to the absence of mutual interference CSMA CA Carrier Sensing Multiple Access Collision Avoidance The medium
37. s correct entry of a password before the radio settings can be updated See details below Clicking the Apply button also causes the program to automatically perform a function in order to confirm the updating action by displaying the updated information Sometimes a blank screen may appear after the Apply or the button is clicked This indicates that either the radio is extremely busy or there is a problem with the Ethernet connection Either try clicking the Apply or the button again or check your Ethernet connection Configure AirEZY 2411 BT There are two sub tabs under the Configuration tab Station and Access Point If the Station page is displayed clicking on the Access Point sub tab switch the display to the Access Point page If the AirEZY 2411 BT is currently configured as a Station all the parameter fields appear dimmed and are not modifiable This is illustrated in the screen shot 2 QTC Configure AirEZY 2411 BT as an Access Point ASR 102 By checking the Change Role to AP red arrowed in screen shot 3 most La Wireless Ethernet Adapter Piel ES OTC Wireless LAN Management Utili Enoypion SAEN about Sind Iv Change Role to AF Access Point Change Password Device Name OTC 80211bEt emt vac 0 OT ET E e SSID janeZv2411 Enhanced Sec 2 Hide SSID Match exact SSID Transfer Rate I Mbps Allowed Station List Authentication Option SharedKey gt Fr
38. ss Point uses the match of the SSID as one of the optional conditions for granting or refuting association See more on this topic in Enhanced Sec below A Manager operator of the network chooses this SSID When a SSID is first introduced it needs to be manually typed in After a SSID is used once the Utility program remembers the SSID and allows it to be selected out of the pull down list for re use The special SSID name any once selected allows an AirEZY 2411 BT to wander across Service Sets with different SSID s without the need to manually obtain and reset the SSID every time Whether the Station radio s association request is accepted or rejected by an AP however is entirely determined by the local network management not guaranteed by the use of any as the SSID When any is chosen the SSID field display turns blank The special role of any works only in the Infrastructure mode Enhanced Sec There are two aspects to the security of a WiFi radio network access control and data encryption PME More details on data encryption are 3 given in the section discussing Encryption Independent of whether Access Point data encryption is used or not the Eee aeet oan _Change Password access of a Station to the network can Device Name OTC 802 11b Ethemet be restricted The AirEZY 2411 BT Mac foo feo ce fe fs foo Access Point can be set up to offer four different levels of access control for the wirel
39. tering the pass phrase will cause 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 modifiable These displayed keys can be copied down and manually entered for radios other than AirEZY 2411 BT to assure interoperability Clicking the button or switching to another tab and then return will cause the keys to be hidden again Up to 64 characters can be entered for the pass phrase Manual Entry requires typing in all four keys 5 bytes 10 characters need to be entered if the 64 bit encryption option is chosen the other 8 bytes 16 characters are dimmed and not modifiable 13 bytes 26 characters need to be entered if the 128 bit encryption option is chosen Use Dynamic WEP Key The La Wireless Ethernet Adapter lel ES encryption scheme adopted by the OTC Wireless LAN Management Utili 7 WLAN 802 11 standard is static in nature Encryption ois j Encryption Such static scheme has been proven nire a eee to be vulnerable to cracking Internet To enable encryption Shared Key must be selected for the downloadable software such as Agthentication Options on the Contig itab Airsnort can crack a static encryption Use Dynamic WEP Key A i TO faye maxim security s lect level 3 for Enhanced Sec key in as short a time as 15 min Trieiccass batting sub tab AirEZY 2411 BT cou
40. the transmission frame error rate Similarly from the Total Received Frames and the Total Received Error Frames one can get a picture of the receiving frame error rate The Total Transmitted Octets and Total Received Octets provide a measure of the total traffic through the radio during the Refresh Time Interval The calculated traffic is displayed in KB Sec Note that these traffic numbers are a measure of the amount of data passing through the radio at a given moment and it should not be confused with the throughput capability of the radio To automatically display these statistics on a regular interval simply enter the desired Refresh Time Interval and then press the Go button Notice that in this mode the button at the bottom of the tab is dimmed and unavailable Screen Shot 15 If the Refresh Time Interval is left empty the button at the bottom of the tab is undimmed Screen Shot 16 and can be pressed to display the statistics accumulated inside the radio up to that point Clicking the button at this point also clears upon the completion of the retrieval of the statistics inside the radio The display stays unchanged until the button is pressed again 16 Transmitted Traffic Received Traffic Oo 054 EBiSec O29 KBiSec Refresh Time T Screen Shot 16 fRettesh j DK E wit pply TK Exit Apply QTC Notice also that in this manual mode throughputs in Bits Sec
41. this button red circled in screen shot 3 The pop out screen for changing password is shown in screen shot 5 The new password is uploaded into the radio just like other parameters on this sub tab when the old password is correctly verified shot 4 pops up as the Apply button is clicked The takes place only after challenge is successfully met A try again message appears as shown in the lower portion of screen shot 4 if incorrect password is entered The radio is shipped with a default password entered on your Quick Start Guide Change this password immediately Make sure that the new password is securely saved somewhere In case the password is lost you must call OTC to obtain a temporary password and a special binary file to get into the radio to reset the password the password w Change Password _ x Old Password New Password Confirm Password o ok E Ote_80211 Old Password is not correct Screen Shot 5 Otc_80211 Confirm Password and New Password Must be the same OTC Each field on this Access Point sub tab is explained below Device Name Allows the user to enter a user 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 Association Re association Requests to the Access Point The Acce
42. ty program or OTC Wireless LAN Management Utility to a port on the same subnet the Utility About is ready for use To start the Utility program from your Microsoft Windows click Start then Program move to locate the AirEZY 2411 BT group and click on the Utility program icon to launch the Utility program OTC Wireless WLAN Management Utility 7 Version 1 11 Overview of the Tabs There are five tabs inside the Utility graphic interface The About tab displays the software version information The Link Info Station Configuration WLAN Statistics and Encryption tabs will be discussed in detail in the ensuing subsections Screen Shot 1 GT ES eT The and buttons at the bottom of the frame are common to all tabs Clicking the button signals the successful completion of the use of the Utility program The program applies the modifications made to all tabs and exits Clicking the button exits the program without changing the setting of the radio The and the buttons are available for the Configuration and the Encryption tabs Clicking the button at any moment causes the program to retrieve and display the most updated configuration information from the radio at that moment Clicking the Apply button updates the radio setting without exiting the program Clicking the AApply button under the Access Point sub tab of the Configuration tab however require
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