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  • I have installed 2 pcs SP912 Access Point in two building, but the connection can´t be established. What can I do?
    For the wireless connection, your connection seems correct. Please check the following :
    1. You could see the two SP912´s frequency domain(ETSI or FCC) in Utility or Web-management. If you can not see the frequency domain info, there must be some problem in the SP912.
    2. The two SP912s in different buildings are in the same IP subnet.
    3. The two PCs that connect to SP912 in different buildings are in the same IP subnet.
    4. The two PCS in different building are in the same workgroup. (if you don´t use server)
    5. The two PCS in different building are in the same domain.
    6. The UTP cable used to connect SP912 and hub are following the color sequence rule. (see Switch and Hub)
    7. The two SP912 are in same channel.
    8. The two SP912 are both in Inter-building mode.
    9. The two SP912´s WEP is disabled.
    10. The two SP912´s Access Control list allow both end to communicate.
    11. You could ping from one PC to both the other PC and the two SP912s.
    Please make sure that there is no obstacle (for example, glass, wall, tree) between antennas.

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  • Why the distance of Wireless LAN is different between indoor and outdoor?
    The working distance for IEEE802.11b Wireless LAN product is quite different in outdoor and indoor. The Indoor range is about 10%-15% of outdoor range. This kind of reduction is a common fact for today´s wireless technology. (for example, the Cisco´s Aironet and Buffalo´s AirStation have the similar reduction on distance between indoor and outdoor)

    The RF signals will be attenuated as they pass through object such as wall and building. The level of signal attenuated is more difficult to determine since the nature of the wall, building is complex and may be unknown. Normally, additional loss attenuation of 10-20 dB or greater can be experienced as signal transmits through these objects.

    Also, the desk, cubic, celling and furniture inside the office will affect the RF signal. The complex of directive RF signal and reflective RF signal will reduce the distance.

    In order to obtain the better distance, user could adjust the relative angle of Access point and Wireless Adapter. Removing the obstacle between Access point and Wireless adapter will also very helpful.

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  • What are the different antenna connector types utilized on Micronet wireless products?
    There are different connectors in different product type:
    TNC:
    Access Points: SP912

    Reversed SMA:
    Network adapters: SP906GK, SP906NE, SP907GP
    Routers/Access Points: SP916NE, SP916NL, SP918NL,
    Antennas: SP920K-7

    N-type:
    Access Points/Bridges: SP9012, SP9012N, SP9015, SP915NLOS-7, SP915NLOS-9, SP915A, SP915M, SP915P, SP915R, ST915T
    Antennas: SP920MA-8, SP920MA-12, SP920MA-10E, SP920FB, SP920PA2-24, SP920LA-12, SP920LA-12E, SP920LA-18E

    SMA:
    Antennas: SP920LA-7

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  • How can I upgrade firmware for SP912 series?
    You can upgrade your firmware via web/telnet/utility. 

    For example on utility program: Simply start utility program and click on Upgrade Tab. You may either enter the file name in the entry field or browse the file by clicking the Open File button. For more information please refer to manual on page 18.

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  • How do I reset SP918 to factory default value?
    Reset the AP manually. If user forgot the user password or user WLAN access point has locked up, user can reset it to factory defaults by performing the following steps:

    1. Power off the WLAN Access Point.
    2. Push in the reset button located on the back of the WLAN access point.
    3. While holding in the button, apply power to the AP.
    4. The access point will start to load the default settings.
    5. Wait for about 5 seconds. Release the push button, then the access point will restart with the factory default settings.

    The AP reset timing is around 60 seconds. Please apply power line cable again to enable default setting.

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  • How to examine antenna distance between two buildings?
    Most companies are using one of a few things to examine the distance between buildings:

    Light meter, GPS, Binoculars

    Most companies will do their best with binoculars and then get their laptops to ´peak´ the signal (move the antenna around a little until you have the highest signal level). This allows them to maximize their signal.

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  • How 802.1x protects your wireless network?
    In a wireless LAN with 802.1X, a user (known as the supplicant) requests access to an access point (known as the authenticator). The access point forces the user (actually, the user´s client software) into an unauthorized state that allows the client to send only an EAP start message. The access point returns an EAP message requesting the user´s identity. The client returns the identity, which is then forwarded by the access point to the authentication server, which uses an algorithm to authenticate the user and then returns an accept or reject message back to the access point. Assuming an accept was received, the access point changes the client´s state to authorized and normal traffic can now take place.

    The authentication server may use the Remote Authentication Dial-In User Service (RADIUS), although 802.1X does not specify it.

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  • Is 802.11g compatible with 802.11b standard?
    The most recently approved IEEE standard for wireless local area networks (WLANs), 802.11g offers wireless transmission over relatively short distances at up to 54 megabits per second (Mbps) compared with the 11 megabits per second of the 802.11b (Wi-Fi) standard. Like 802.11b, 802.11g operates in the 2.4 GHz range and is thus compatible with it.

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  • What is VSWR?
    VSWR stands for Voltage Standing Wave Ratio. It is the ratio of the maximum/minimum values of standing wave pattern along a transmission line to which a load is connected. VSWR value ranges from 1 (matched load) to infinity for a short or an open load. For most wireless LAN antennas the maximum acceptable value of VSWR is 2.0. VSWR of 1.5 or less is excellent. This is approximately the same as a Return Loss of 14.5 dB. What this means is that most of the signal from the transmitter to the wireless antenna is being radiated. (96% radiated and 4% reflected) A VSWR of 2.0 (return loss of 9.5 dB) means that 90% is radiated and 10% reflected.

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  • How do I eliminate wireless interference from a new neighbor´s unlicensed system?
    The best way to reduce the interference is to work with him and agree upon polarizations, channels and coverage areas. One of you should use vertical polarization and the other horizontal polarization for PtMP. If you are using DSSS channel 1 for a certain area, then he should use channel 6 or 11. Both of you should be using sector panel antennas with good F/B. If you are using DSSS and he is using FHSS, then you must rely upon polarization, distance and sectorization for isolation between the systems. You may be able to place a null in your AP antenna pattern toward his nearest AP location. If possible, place your AP as far away from his AP as possible, so that your customers can use the directivity and F/B of the CPE antenna for isolation. If both of you are using FHSS, then you should agree to use separate non-interfering sets.

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  • What is SSID Broadcast?
    This is a function performed by an Access Point that transmits its name so that wireless stations searching for a network connection can ´discover´ it. It´s what allows your wireless adapter´s client manager program or Windows XP´s built-in wireless software to give you a list of the in-range Access Points.

    The ability to disable SSID broadcast essentially makes your Access Point invisible unless a wireless client already knows the SSID, or is using tools that monitor or ´sniff´ traffic from an AP´s associated clients.

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  • What is 802.11d Standard?
    802.11d is supplementary to the Media Access Control (MAC) layer in 802.11 to promote worldwide use of 802.11 WLANs. It will allow access points to communicate information on the permissible radio channels with acceptable power levels for user devices. The 802.11 standards cannot legally operate in some countries; the purpose of 11d is to add features and restrictions to allow WLANs to operate within the rules of these countries.

    802.11d Compatibility List as follow:

    SP912G, SP918GK, SP916BM, SP906GKV3, SP907GH, SP907GK, SP907BK and SP908GKV4

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  • How WPA (Wi-Fi Protection Access) works?
    WPA stands for Wi-Fi Protected Access whch is a specification of standards-based, interoperable security enhancements that strongly increase the level of data protection and access control for existing and future wireless LAN systems. Designed to run on existing hardware as a software upgrade, Wi-Fi Protected Access is derived from and will be forwardcompatible with the upcoming IEEE 802.11i standard. When properly installed, it will provide wireless LAN users with a high level of assurance that their data will remain protected and that only authorized network users can access the network. The Wi-Fi Alliance plans to begin interoperability certification testing on Wi-Fi Protected Access products starting in February 2003.

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  • What is WDS?
    WDS (Wireless Distribution System) is a Wireless Access Point mode that enables wireless bridging in which WDS APs communicate only with each other only (without allowing for wireless clients or stations to access them), and/or wireless repeating in which APs communicate both with each other and with wireless stations (at the expense of half the throughput).

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  • What is AES (Advanced Encryption System)?
    Advanced Encryption Standard. A symmetric key encryption technique which replace the commonly used DES standard. It was the result of a worldwide call for submissions of encryption algorithms issued by NIST in 1997 and completed in 2000. The winning algorithm, Rijndael, was developed by two Belgian cryptologists, Vincent Rijmen and Joan Daemen. AES provides strong encryption in various environments: standard software platforms, limited space environments, and hardware implementations.

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  • What does IEEE 802.11 feature support?
    The product supports the following IEEE 802.11 functions:
    ‧ CSMA/CA plus Acknowledge Protocol
    ‧ Multi-Channel Roaming
    ‧ Automatic Rate Selection
    ‧ RTS/CTS Feature
    ‧ Fragmentation
    ‧ Power Management

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  • Can Wireless products support printer sharing?
    Wireless products perform the same function as LAN products. Therefore, Wireless products can work with Netware, Windows 2000, or other LAN operating systems to support printer or file sharing.

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  • Would the information be intercepted while transmitting on air?
    WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum technology, it has the inherent security feature of scrambling. On the software side, WLAN series offer the encryption function (WEP) to enhance security and Access Control. Users can set it up depending upon their needs.

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  • What is AFH ?
    Adaptive Frequency Hopping (AFH) designed to reduce interference between Bluetooth devices and other wireless technologies, such as 802.11b and 802.11g.

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  • What is LMP?
    Link Manager Protocol--used by Bluetooth for internal communications.

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  • What is Page Scan Mode?
    A Bluetooth mode in which a server is actively listening (scanning) for a client to "page" it. The server then answers the page and attempts to set up a connection with the paging device (the client).

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  • What is PIM?
    Personal Information Manager--an application, such as Microsoft Outlook, that is used to manage contacts, keep track of phone numbers.

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  • What is WALN "roaming"?
    In an infrastructure network, this is when a wireless PC moves out of range of the previously connected access point and connects to a newly connected access point. Throughout the network environment where access point is deployed, PCs can always be connected regardless of where they are located or roam.

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  • What is Temporal Key Integrity Protocol (TKIP)?
    The Temporal KeyIntegrity Protocol, pronounced tee-kip, is part of the IEEE 802.11i encryption standard for wireless LANs. TKIP is the next generation of WEP, the Wired Equivalency Protocol, which is used to secure 802.11 wireless LANs. TKIP provides per-packet key mixing, a message integrity check and a re-keying mechanism, thus fixing the flaws of WEP.

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  • What is BSSID?
    A specific Ad Hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be configured with the same BSSID.

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  • When I surf the Internet, I can ping but I can´t surf some websites. Why?
    There seems to be some virus, Firewall filter, URL filter or browser bug recently that is causing this issue. It will happen in non-Micronet products also. You can test this by pressing "Control-F5" to let the webpage reload. If pressing Control-F5 works, then the result still living. In the situation, please reboot your OS in safe mode and runs a virus scan (make sure you have the latest virus definition). Or reinstall your browser program.

    Another possibility is the MTU and MRU value are set incorrectly with your ISP. In this case, please lower the MTU and MRU value to lower values (such as 1463, 1432, or 1400).

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  • Why doesn´t my PCMCIA card works when installing in the notebook?
    Please remove all previously installed wireless driver. Wireless card drivers can conflict with each other. If you do not know how to uninstall old drivers. You can search the drivers files of the old card in your PC. You can remove the driver safely (but please keep backup before removal).

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  • What is the need for Wireless Site Survey?
    In WLAN, many enverionment parameters can arise which can prevent the radio frequency (RF) signal from reaching all parts of the facility. Examples of RF issues include mulitpath distortion, hidden node problems, and near/far issues. In order to address these, you need to find the real regions where these issues occur. The site survey helps you to do this. It helps define the contours of RF coverage in a particular facility and helps us to discover regions where mulitpath distortion can occur, areas where RF interference is high and find solutions to eliminate such issues. The site survey that determines the RF coverage area in a facility also helps to choose the number of Wireless devices that a firm needs to meet its business requirements.

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  • What is a Wireless site survey?
    A radio frequency (RF) site survey is the "first step" in the deployment of a Wireless network and the "most important step" to ensure desired operation. It is a task-by-task process by which the surveyor studies the facility to understand:

    a.) The RF behavior
    b.) discovers RF coverage areas
    c.) Checks for RF interference and determines the appropriate placement of Wireless devices.

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  • What basic equipment is required for the completion of a site survey?
    The basic equipment and utilities that are required for the completion of a site survey include:

    I) Wireless access point
    II) Laptop or PDAs with Wireless client card
    III) Variety of antennas (this depends on the requirement of the firm)
    IV) Site survey utility software (Optional)

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  • What are the steps to perform a site survey?
    These are the steps that are performed:

    A.) Obtain a facility diagram in order to identify the potential radio frequency (RF) obstacles.
    B.) Visually inspect the facility to look for potential barriers or the propagation of RF signals.
    c.) Identify user areas that are highly used and the ones that are not used.
    D) Determine preliminary access point (AP) locations. These locations include the "power", "wired network access", "cell coverage", "overlap", "channel selection", "mounting locations" and "antenna".
    E) Perform the actual surveying in order to verify the "AP location". Make sure to use the same AP model for the survey that is used in production. While the survey is performed, relocate APs as needed and re-test.
    F) Document and Record the findings, the locations and log of signal readings as well as data rates at outer boundaries.

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  • What is IEEE 802.11?
    IEEE 802.11 is a set of standards developed by ‘Institute of Electrical and Electronics Engineers’ (IEEE) to allow efficient communication of Wireless Local Area Network in 5 GHz and 2.4 GHz. Current extensions for 802.11 are 11a, 11b, 11g and 11-Draft N. The main difference between the standards is the variation of the data rates and the operating frequency (11a: 5 GHz and 54Mbps, 11b: 2.4 Ghz, 11Mbps, 11g: 2.4 Ghz, 54Mbps, 11n: 2.4 Ghz, 300Mbps).

    (Note: the data rate provided for each extension is only the theoretically maximum performance where all factors are tuned to the optimal environment. Actual throughput will vary across distance and environment.)

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  • What is the range and data rate comparison between 11g and 11b Networks?
    11g will need to sacrifice distance for better data rate in ‘short’ distance. 11b network will need to sacrifice data rate in short distance for longer range. SP912GH in close proximity within the same building can achieve data rate close to 54Mbps. For SP912V3H, close proximity is only 11Mbps at max. When increased to few kilometers in distance, the signal for SP912GH when compared to SP912V3H will be much lower. However, the data rate between two devices over long distance will get relatively close when range increases.

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  • Does increasing output power of only AP increase overall connection quality?
    Wireless connection is a two way connection. If users increase only the output power of one side (AP), it will only have enough strength to send the signal to the other side (PC with Adapter). However, the PC side with adapter can receive the information but it does not have the power to send the signal back. Therefore for improving overall connection quality, users must increase output power of both ends.

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  • For 11n Network, what is the difference between 2T3R and 1T2R?
    2T3R or 1T2R are referring to the new antenna technology multiple-input and multiple-output (MIMO). MIMO uses multiple antennas for both transmitter and receiver to improve the wireless connection quality. Mainly T refers to transmitter and R is receiver, therefore 2T3R uses 2 transmitters and 3 receivers for communication. Our SP916N range of products uses 2T3R and when comparing with 1T2R products, it has higher data rate and distance coverage.

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  • What is difference between PtP and WDS?
    Point-to-Point (PtP) is a paired bridge connection where it will not service other wireless device except its paired AP. Whereas Wireless Distribution System (WDS) allows multiple AP to be connected in a web and also service nearby PCs with wireless adapters.

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  • Is it possible to use an outdoor antenna with indoor bridge APs?
    Common indoor APs use RSMA and TNC antenna connectors which is suited for indoor antennas. RSMA and TNC antenna cables are more vulnerable to signal loss as length increases. Outdoor antenna will use N-type connectors and cables since it is more vulnerable to signal loss. Users can easily increase their signal strength and eliminate signal loss by using a RSMA-to-N-type converter cable for connecting to N-type outdoor antennas.

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  • How to configuring your SP916NL Router as an Access Point?
    SP916NL Broadband Router can be configured to act as strictly an Access Point (AP), bypassing all of the routing and firewall functions. This function is most commonly used to make an existing wired network wireless.
    Setup Steps
    1. Connect the computer to one of the four LAN ports on your SP916NL.
    2. Follow QIG - Hardware Installation Section to configure IP address.
    3. Open a web browser on the computer.
    4. In the address bar of the web browser, type http://192.168.1.1
    5. You will see the login page of the SP916NL router, see below pic1.

    Click on the upper corner of the right-hand side of the web page, the “Advanced Settings” link, the advanced setting page will shows up. And on the advanced setting page, choose “Wireless setting” option, and also make sure “Wireless Working Mode” as “Wireless Access Point (AP)”, see below pic2.

    In addition, select “Enable” Wireless function and set any other wireless configuration as you need.
    6. Go to “DHCP Server” option, and make sure you turn off the DHCP server,
    see below pic3.

    7. If the router’s default IP address range doesn’t match your network, make sure change the router’s IP address before you use it as an Access Point (AP). As long as the first three sets of numbers of IP address match your existing network, your wireless Access Point will be fine and ready to use.

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