Honeywell International Inc. WLUWIFIM010 Manuale Utente
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HIF-1472R6(1)
An aircraft lands at an airport in a country that allows CWLAN operation. The CWLU is configured and radio
enabled after landing. The CWLU begins sending IEEE802.11 beacons. Wireless computers detect CWLU
beacons and initiate association.
IEEE802.11i/WPA2 authentication and encryption is performed. Upon successful completion, the CWLU
permits valid Wireless computers CWLAN access.
enabled after landing. The CWLU begins sending IEEE802.11 beacons. Wireless computers detect CWLU
beacons and initiate association.
IEEE802.11i/WPA2 authentication and encryption is performed. Upon successful completion, the CWLU
permits valid Wireless computers CWLAN access.
8.
SYSTEM INTERFACES
8.1.
High Level Functionality
8.1.1. Wireless Interface
The WLU supports an 802.11b/g interface.
8.1.2. Protocol
The WLU Wi-Fi interface is compatible with IEEE 802.11b/g mode.
8.1.3. Data Rate
The WLU Wi-Fi interface supports all data rates specified in IEEE 802.11b and 802.11g up to a 54 mbps raw
data rate.
data rate.
8.1.4. Frequency Assignment
The WLU Wi-Fi interface operates in the ISM Band in accordance with IEEE 802.11 specifications.
8.1.5. Power Input
The power supply accommodates 28 VDC sources that meet the requirements in Table 2-3.
The TWLU is capable of operating through a 300 millisecond power interrupt on the 28VDC input.
8.1.6. Ethernet
The WLU provides two IEEE802.3 10/100BTX Ethernet interfaces capable of switching Ethernet traffic
between them.The WLU Ethernet interfaces meet LRU link budget guidance per ARINC 664 Part 2.
between them.The WLU Ethernet interfaces meet LRU link budget guidance per ARINC 664 Part 2.
8.2.
Discrete Interfaces
8.2.1. The WLU supports three input discretes to configure itself. (See 8.3, Position Pin Discretes)
8.2.2. The WLU provides an open/ground discrete input interface for Default Reset. The Default
Reset discrete will command the WLU to be returned to factory defaults if grounded when the
WLU starts up.
WLU starts up.
8.2.3. The WLU provides an open/ground discrete input interface for powering the unit on and off
with ON being the OPEN state.
8.2.4. The WLU provides an open/ground discrete output interface for indicating microprocessor
valid status.
8.2.5. The WLU provides an open/ground discrete output interface for indicating Ethernet activity.