Welch Allyn Acuity LT Mobile - Installation Guide - Manual (Page 10)

6 Chapter 2 Plan the installation Welch Allyn Wireless Acuity LT Central Monitoring System
Wireless Acuity LT System components
Patient monitors
The Acuity LT System links Micropaq, Propaq LTR, and Propaq CS wireless portable
patient monitors to the Acuity LT Central Station.
The 12-patient Acuity LT System capability can be expanded to support up to 28 patient
monitors. This system includes a second display with trackball, and a standard quantity of
four APs (expandable to a total of seven APs).
Acuity LT Central Station
The Acuity LT Central Station consists of a Sun Microsystems workstation CPU and
display. The CPU operates with Welch Allyn’s Acuity LT System software. Patient data,
alarms and equipment alerts are presented on the display.
Network
The wireless patient monitors communicate through an internal radio card to a wireless
local area network (WLAN) using international standard IEEE 802.11. This product
operates within the 2.4GHz RF spectrum (super high frequency). It uses frequency
hopping spread spectrum (FHSS) technology to establish bi-directional data linkage to an
access point (AP). The APs provide the conversion from wireless to wired communication
through connection to an ethernet switch using international standard IEEE 802.3. The
switch connects to the CPU using standard Ethernet 10 Base-T.
As each wireless patient monitor is moved throughout the facility, network
communication automatically transitions between APs without disruption of service,
provided that the APs are properly located in the facility.
Network configuration
The CPU, APs, and monitors are configured with an 802.11 Extended Service Set ID
(ESSID) or network name unique to the Acuity LT System (such as “com8.protocol”). The
network name for the CPU and APs must be configured at the factory. The network name
for each wireless monitor can be set locally. If a facility has more than one Acuity LT
System, the CPU, AP, and wireless monitors must be configured at the factory with a
different network name to prevent interference between networks.
In addition to the network name, each AP is uniquely configured with a number to
distinguish it from other APs in the network. Each AP is uniquely labeled and must be
factory-configured.
Antennas
Each AP has two antennas, the Sandra “D” (SD) type and the whip type antenna. For best
reception, the SD is typically mounted on the ceiling in a horizontal orientation, and the
whip type is mounted vertically on the AP.
Modem
An external modem is connected to the CPU and a dedicated analog phone line. Modems
can vary according to the telecommunication requirements in different countries. The
modem allows remote technical support if required.