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Chapter 1: 7401-2xxx and 3xxx Product Overview 1-13
LED Indicators for Link Integrity (verifies cable and hub connection are
good) and LAN speed is provided on the Processor Board near the row
of connectors at the bottom of the e-box. The LED is ON (yellow) when
the speed is running at 100 MB/s.
Link Integrity is provided to the PC chipset to permit boot-up software
to verify the presence of the LAN connection. Software must allow 2
seconds after power-up in order for the Link Integrity signal to become
valid.
Wireless LAN Communications
When a wired Ethernet connection is not desired, a wireless LAN
adapter may be installed in the PCMCIA socket. This requires that the
PCMCIA daughter-card feature be installed. A wireless LAN used in
the terminal must meet the following requirements:
• Integrated antenna that meets the requirements of PCMCIA (PC
Card) Extended Type 2 card definition (a maximum of 5-cm
additional length).
• Power consumption within the capabilities of the PCMCIA
daughter-card.
• Signaling requirements within the capabilities of the terminal
PCMCIA interface. The main restriction is that DMA transactions
are not supported over the PCMCIA interface.
• Device drivers for the targeted operating system must exist.
• Appropriate infrastructure (server support, Base Stations, Ceiling
Antennas, etc) must be present in the installation site, and the
maximum RF range of the wireless system must not be exceeded.
Interoperability - While the 802.11 standard provides an interoperable
protocol definition, there are vendor-specific extensions to the protocol
that encourage users to stay with one supplier's equipment. This also
applies to wireless infrastructure and access points, 802.11 does not
govern this operation. Mixing of RF suppliers on a site is not
recommended until the RF suppliers have demonstrated
interoperability.