Toshiba GN-1050 manual Glossary, AP Access Point

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2 APPENDIX

Glossary

Ad hoc mode

A type of network for wireless LAN communications. In this mode a network is easily built because no access point is required. However, this mode is not available for multiple simultaneous communications due to its poor extensibility; in other words, it is unsuitable for wireless LAN communication connecting many devices.

AP (Access Point)

Stands for Access Point. Access points are required to relay terminals for a communication in the Infrastructure mode, explained later in this section.

Channel

A segment for 2.4 GHz frequency bandwidth for wireless LAN communications. When more than one access point exists in a narrow area in the Infrastructure mode, different channels are required for each in order to avoid radio wave interference. Communications among devices with different channels are not available even if their SSIDs (explained later in this section) are the same.

CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)

A type of access controlling method for wireless LAN communications. In this method terminals constantly monitor their communication status with each other. When one terminal is communicating, others stop their communications and wait until they confirm that an available access route comes up, in order to avoid the collision of communication signals as much as possible.

DSSS (Direct Sequence Spread Spectrum)

A type of signal transmission system for wireless LAN communications. As one of the characteristics of this system, less noise occurs during communication and thus DSSS communication interferes with other communications less, because signals are spread to a wide spectrum with a small amount of electric power. Also this system uses the Pseudo Noise Code for the modulation and demodulation of signals, so a confidential communication with less risk of being intercepted is available.

IEEE (Institute of Electrical and Electronics Engineers)

An organization that promotes studies for electronic related fields. The major activities of IEEE are holding academic conferences and publishing technical papers. Also its internal committees establish and recommend technical standards. The IEEE802 LAN/MAN Standard Committee of IEEE is in charge of technical standards for wireless LAN communications.

IEEE802.11b / IEEE802.11g

Technical standards established by IEEE for wireless LAN communications with a 2.4 GHz frequency bandwidth.

Infrastructure mode

A type of network for wireless LAN communications. This mode is suitable for a wireless LAN communication connecting more than one device because a simultaneous communication among these devices is available by installing access points. Also interface ports embedded in each access point can extend the range of communication by integrating wireless LAN and wired LAN.

OFDM (Orthogonal Frequency Division Multiplexing)

A type of communication system for wireless LAN communications. This is one of the multi-carrier systems that transmits signals through multiple carriers with different center frequencies and makes these carriers orthogonal so that they will not interfere each other, and thus efficient communications will be available within a narrow bandwidth.

PMK (Pairwise Master Key) cache

A function to cache PMKs, base information for encryption keys, to multiple access points. By caching the PMKs, the period of time for authentication is greatly reduced for a terminal which once succeeded its authentication. Therefore in a case in which an access point is switched during communication due to the movement of a terminal, for example, the period for which the communication is paused will be minimized.

PSK (Pre-Shared Key) passphrase

“PSK” is a preset encryption key shared with terminals and “passphrase” is a character string required for PSK authentication. A passphrase consists of a number of words (phrase), while a general password is only a short single word. This means passphrases have a stronger tolerance toward security invasion than passwords.

RADIUS (Remote Authentication Dial In User Service)

A protocol for network service authentication. This protocol originally developed for authentication for dial-up connections is now used for authentications for various network services. The RADIUS server is an authentication server supporting RADIUS protocols. This server efficiently controls access to a network because the authentication information of network users and their accessing statuses are centrally controlled.

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Contents Operators Manual for Wireless LAN Module Page ‰ Model and series names in this manual „ How to read this manual ‰ Symbols in this manualPreface ‰ Explanation for control panel and touch panel‰ Trademarks Precautions Precautions ‰ Regulatory Information ‰ Canada Industry Canada IC‰ Europe EU Declaration of Conformity ‰ USA-Federal Communications Commission FCC Labelling‰ Regulatory Notice for Channel Use in France „ NotesPage Contents Contents Setting up the Ad Hoc Mode Before Setting Up Wireless NetworkSetting Up the Infrastructure Mode Disabling Wireless NetworkBefore Setting Up Wireless Network „ Planning for installation‰ Determine the network type ‰ Determine the security mode ‰ Determine the SsidWEP Enter the administrator password and press the OK Setting Up the Infrastructure ModePress the Password „ Select network typePress the Wireless Settings Press the on and press the NextSetting Up the Infrastructure Mode „ Specify Ssid ‰ Selecting the Ssid from the available network listPress the Available Network ‰ Entering the Ssid manually Press the SsidScreen returns to the Ssid Settings screen „ Select security mode ‰ Selecting WPA/WPA2 security mode with EAP-TLS protocolPress the WPA or WPA2 and press the Next Setting PMK cache Press the EAP-TLS and press the NextPress the EAP User Name Specify the following items and press the Next PasswordPress the Next User CertificateFull Agreement of Server Name Encoding FormatCA Certificate Encryption Intensity Select the encryption intensityTransmit Power Encryption Between AP and STATransmit Rate Confirm the settings and press the Finish Press the YES to shutdown the equipment‰ Selecting WPA/WPA2 security mode with Peap protocol Press the Peap and press the NextEAP User Name EAP PasswordEnter the following items and press the Next Retype PassEncryption Intensity Confirm the settings and press the Finish ‰ Selecting WPAPSK/WPA2PSK security mode Press the Wpapsk or WPA2PSK and press the NextPSK Pass Phrase Specify the following items and press the Next WEP Encryption ‰ Selecting WEP security modePress the WEP button and press the Next KEY Entry MethodSpecify the following items and press the Next ‰ Selecting no security mode Press the None and press the NextConfirm the settings and press the Finish Setting up the Ad Hoc Mode Wireless Settings screen is displayed Press the AD HOC and press the Next „ Specify Ssid Wireless LAN Security Settings screen is displayed Press the WEP and press the Next Select the transmit power and press the Next Select the transmit power and press the Next button Confirm the settings and press the Finish buttonPress the YES to shutdown the equipment Disabling Wireless Network Press the Password buttonPress the OFF and press the Next Press the FinishPage Specification Troubleshooting Glossary AppendixSpecification DescriptionTroubleshooting When Error Messages are DisplayedAP Access Point GlossarySsid Service Set ID Page Index Index GN-1050 OME080038D0 GN-1050

GN-1050 specifications

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