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Discussion Subject

 

Subject: XI-1450 (11Mb Access Point)     

Description: Basic FAQ

 

Question and Answer

Question: I download firmware and the XI-1450 does not accept it. An error message “Invalid Failure” shows up.

Answer: It is very possible that you have got the wrong firmware. Ask for the supplier for the correct firmware.


Question: I can not telnet my XI-1450?

Answer: There are four possible causes:
1. Your XI-1450 is not configured with a proper IP address.
2. The physical connection between XI-1450 and a hub/PC is not properly made.
3. The telnet port is not correctly configured on your firewall setup.
4. The last session is not closed properly. Wait for about 5 minutes and re-telnet the XI-1450.


Question: My XI-1450 does not work. Why?

Answer: Please check with the following:
1. Check if the power adapter has been firmly plugged into the electric socket.
2. Check whether or not the LED activities perform normally.
3. Check whether the RJ-45 has been correctly connected.


Question: Can the XI-1450 connect to an external antenna?

Answer: Yes, but you need proper connectors and cable.


Question: What is the maximum number of MAC addresses that can be entered in the Access Control Table?

Answer: The maximum number is 512.


Question: Does the XI-1450 support 128-bit security algorithm?

Answer: The 128-bit algorithm is supported after firmware version 3.0.0.


Question: Does the XI-1450 firmware v.2.5.0 work with Access Point Manager v.2.0.0 and vice versa?

Answer: No, they cannot. The versions of the firmware and utility need perfectly matched. We strongly recommend you to keep updating latest firmware and utility for you XI-1450.


Question: Does the XI-1450 require IP address?

Answer: In Bridge mode, the XI-1450 does not need an IP address only if users desire to manager it via Web or Telnet. Assign an available IP address for your XI-1450 and you may access it through these two interfaces.


Question: What are the 3 IP modes in XI-1450?

Answer: XI-1450 has 3 different IP modes, Bridge, Router and Brouter mode
Bridge
: XI-1450 works as a transparent bridge.
Router: XI-14500 works as a
SOHO router. It can route IP packets.
Brouter: Basically, it is just like Router mode but bridges non-IP packets.


Question: What is the maximum number of wireless clients that are allowed to access the XI-1450 under Infrastructure mode?

Answer: Technically, the maximum number of wireless clients that can get connected to the XI-1450 is 250 wireless PCC working concurrently. We do not recommend designing your wireless network like that. Because 250 clients have to share only approximately 5 M bits bandwidth.


Question: Does the XI-1450 work with the 2M wireless PC Cards?

Answer: Yes. As long as the 2M Wireless LAN card is 802.11 compatible.


Question: Can Wireless LAN card roam between several XI-1450 when the XI-1450s are configured in different channel but same ESSID?

Answer: Yes, as long as the Wireless LAN cards are configured as the same ESSID, or the ESSID is non-specified, they can roam between XI-1450s.


Question: The LED indicators on the XI-1450?

Answer: PWR: The Power LED will become steady green right after the XI-1450 is powered up;
AP: The AP LED will be on when the AP service is started (under AP mode).
WLAN: The Wireless LED will blink when the XI-1450 is Tx/Rx data.
LAN: This LED asserts when power is on. It blinks when the XI-1450 is Tx/Rx data with the Ethernet devices.
LINK: This LED will be on only if wireless clients get connected to the Access Point.


Question: What kind of Internet browser does XI-1450 support?

Answer: We strongly suggest using Internet Explore Version 4.01 and after.


Question: What is Web management?

Answer: Web Management is a unique administrative tool that helps net administrators to remotely manage XI-1450 with just a web browser. The basic functions of Web Management are: Offering information of wired/wireless ports; controlling Access Point Configuration Management and Bridge port configuration Management.


Question: What configuration interface does XI-1450 support?

Answer: There is a total of 3 configuration interfaces to set up the XI-1450, which are: Window-based Utility, Telnet, Web management.


Question: Does XI-1450 have compatibility problem with the verity of operating system?

Answer: The XI-1450 is a stand-alone wireless device that does not require any driver for it. Just plug the XI-1450 and it is ready to work.


Question: What are its operation frequency/operation channels?

Answer: N. America/FCC: 2.412~2.462 GHz (11 channels);
Japan/ARIB: 2.412~2.484 GHz (14 channels);
Europe/ETSI: 2.412~2.472 (13 channels);
France: 2.457~2.472 GHz (4 channels);
Spain: 2.457~2.462 GHz (2 channels);


Question: What MAC protocol does XI-1450 use?

Answer: CSMA/CA+ACK (per IEEE802.11b Spec.)


Question: What radio mode dose XI-1450 support?

Answer: It support AP (Access Point) mode.


Question: What is multi-path fading?

Answer: When you speak in a large building you experience more echoes then when you speak in a small room. The RF signal suffers from the same phenomenon. The echoes are actually multiple reflections of the original radio signal that can be detected by the receiver. An environment that has severe echoes is said to have a “delay spread”.


Question: Why the XI-1450 uses two antennas?

Answer: The purpose of using two antennae is to avoid multi-path fading problem. The use of two antennae assures proper reception of the signal and can cope with environments with large delay spread.


 

Question: What security is provided with the XI-1450?

Answer: The XI-1450 uses the highly secure Direct Sequence Spread Spectrum technology. On top of that, logical codes are used to prevent messages of one network to be interpreted by another network. On the access point, the access of the mobile stations can be regulated: in the access control feature the user can list exactly those mobile stations that are allowed to connect to the infrastructure network. As an option, IEEE 802.11 defines a wired LAN equivalent data confidentiality algorithm, known as Wired Equivalent Privacy (WEP), to protect from eavesdropping.


Question: Can XI-1450 work with other vendors’ wireless LAN cards?

Answer: Yes, since the XI-1450 is 802.11b compliant, it can work with all XI series Wireless LAN card. Other than that, it can also work with other vendors’ Wireless LAN card, as long as they are 802.11b compliant.


Question: What modulation does XI-1450 use?

Answer: Direct Sequence Spread Spectrum (CCK, DQPSK, DBPSK). CCK, which is based on Direct Sequence Spread Spectrum Technology (DSSS), works with complex code words of 8 chips long and will provide speeds of 11 and 5.5 Mbit/s, using the same bandwidth as the 2 Mbit/s DSSS 802.11 standard.


Question: How will XI series products benefit your needs?

Answer: On top of already well-known features and functions of the Airbond product family, the XI series product provides Ethernet-like performance to the wireless realm.


Question: How to enable WEP on my XI-1450?

Answer: The XI-1450 provides three WEP encryption options: Disable, Optional WEP40, WEP40 and WEP 128 (The Optional WEP40 are no longer supported after firmware version 3.0.0. WEP128 is supported after firmware version 3.0.0). Disable allows wireless adapters communicate with Access Points without any data encryption. WEP40 requires wireless stations to use data encryption when communicating with the Access Point. Optional WEP40 allows wireless clients to communicate with the Access Point with or without data encryption. When the WEP40 or Optional WEP 40 is selected, type five alphanumeric characters in the range of “a-z”, “A-Z” and “0-9” (e.g. MyKey) in the WEP Key 1 entry field. Alternatively, you may enter 10 digit hexadecimal values in the range of “A-F” and “0-9”, preceded by the characters “0x” values (e.g. 0x11AA22BB33). You can also enter WEP keys in the Key 2, Key 3 and Key 4 if you wish. WEP will only use 1 Key. You will have to select one WEP key as an active key before enabling use of encryption. Be noted that the WEP key must be set up exactly the same on the Access Points as they are on the wireless client stations. If you use Key 1 on the Access Point and the value is (e.g. MyCar), the same must be assigned to Key 1 for all client stations. Also, when the Optional WEP40 is chosen, you still need to set the WEP Keys same as wireless clients.


 

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