User Manual

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WhereLAN III User’s Guide

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User’s Guide, WhereLAN III draft D1675 rev F

Zebra Confidential

the end user, automatically self configures and automatically adjusts to a wide

range of Radio Frequency environmental changes. The new Time Synch II

service is substantially different from and is not backwards compatible with

the Legacy Time Synch service. In Legacy mode, the embedded wireless time

beacons are transmitted over the right channel whereas both the left and right

channels are used in Time Synch II mode. Time Synch II can operate in an all

WhereLAN IIIs network, an all LOSs network, or a network with mixed

WhereLAN IIIs and LOSs. However, in order for Time Synch II to work with

LOSs, they must operate in “dual-posting” mode.

Wi-Fi: A variant of the LOS, known as a Locating Access Point (LAP),

supports an integral 802.11 b/g/a Access Point. WhereLAN III does not

support an integral Access Point. Instead, a variant of WhereLAN III supports

establishing an 802.11 b/g Wi-Fi client side connection to any industry-

standard Access Point. Unlike WhereLAN III, the LOS does not support

establishing Wi-Fi client side connections.

Network Auto-Configuration (DHCP) and IPv6: The WhereLAN III, with the

release of VSS 4.0.5.2 support both DHCP IP and IPv6 address assignment.

However, the methods used by system software to establish connectivity with

the sensors on start-up preclude the full use of (dynamic) DHCP IP addresses.

This restriction is being eliminated, in the VSS 4.0.5.2 release, for WhereLAN

III sensors by a new process, referred to as Network AutoConfig. This

process conveys the IP address of the RTLS server to the WhereLAN IIIs as

part of the standard DHCP IP address assignment message exchange. In turn,

the WhereLAN IIIs “check-in” with the RTLS server by passing it the MAC

address of their Ethernet port. The RTLS server uses the MAC address to

“authenticate” the identity of the WhereLAN IIIs by checking for the MAC

addresses to be present in the site configuration file.

IEEE 802.3af Power of Ethernet (PoE): WhereLAN III supports industry-

standard PoE. This allows for easier installation as it removes the need to run

DC power cabling to the unit. PoE may be supplied by any standards-

compliant network switch. Alternatively, Zebra offers a single-line PoE

injector.

Power Consumption: WhereLAN III consumes just 12 watts, a 31% and 57%

reduction relative to the LOS and LAP, respectively.