F15 Series Fetal & Maternal Monitor User Manual WI-FI Networking and Instructions
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that are not officially released by device vendors.
Operation of the monitor may be risky if adopting network equipment of which compatibility is not
certified by EDAN. In this case, EDAN recommends that the customer test run the monitor for at least
24 hours to confirm that there is no problem with the compatibility.
The following measures can be taken to confirm and guarantee wireless coverage requirements.
Air interface detection: Space environment confirmation for the wireless working frequency band is
necessary. It is necessary to test and record the RSSI value and the co-channel interference condition
(C/I) of the claimed coverage area. Space confirmation activities need to cover all declared areas,
including elevators, remote corridors, etc. Air interface detection needs to be done while the network is
normal and other wireless devices are in use. The client can implement air interface detection through
third-party software tools such as airmagnet, wirelessmon, or other network acceptance tools
recommended by EDAN. The coverage of the RSSI needs to be viewed from the monitor, so the
airborne detection tool needs to be calibrated using the monitor's RSSI display. When doing the air
interface detection, you need to enable the broadcast function for the SSID used EDAN.
Co-channel interference: The most obvious interference to Wi-Fi is co-channel interference. The
signal strength closest to AP perceived by the wireless monitor must be at least 20 dB stronger than
the signal strength of other APs in the same channel. Taking the 2.4G frequency band as an example,
it is recommended to use a channel layout with 5 intervals to achieve Wi-Fi___33 coverage similar to
cellular.
When considering the co-channel interference, it is necessary to take into account the inter-floor
interference. It is necessary to avoid the occurrence of a pair of AP position corresponding to each
other within a two-story building and working on the same channel.
Wireless Device Configuration Requirements
Wireless device configuration is critical to the reliable operation of EDAN monitor. The following
content should be paid special attention to:
Security settings
Try to use WPA2-PSK, WPA2-Enterprise authentication and encryption methods. If these
authentication and encryption methods are not used, the monitor may not operate normally and
patient information may be leaked. It is recommended to use WPA2-Enterprise and long password.
Throughput rate
The average throughput requirement for a single monitor is 330 kbps, and a 50% throughput derating
is recommended. For example, if there are 16 monitors that require 5.3 Mbps of bandwidth, at least 10
Mbps throughput needs to be planned for the monitor. The service personnel should first check and
verify the AP's wireless rate and bandwidth settings at the hospital site before installing the device.
If the monitor times out, it means that the waveform, parameters, patient information, working mode,
etc. will lose data/function failure.
Cause 1: The recommended security authentication and encryption methods are not adopted, or
authentication and encryption information is leaked, resulting in unauthorized Wi-Fi devices
connected to the AP, thus consuming excessive communication bandwidth.
If the monitor issues network disconnection alarm, it means the waveform, parameters, patient
information, working mode, etc. will lose data/function failure. The cause may be too many devices
connected to the same AP or incorrect AP settings.
Users need to take measures to strictly control the acquisition method of Wi-Fi security settings in
internal management to ensure that they are not obtained by unauthorized persons.
Cause 2: There is interference of the same frequency or adjacent frequency. Maybe because the
channel setting of similar devices or devices with Wi-Fi function is the same or adjacent to that of the
monitor. When their locations are close, it’s easy for them to interfere with each other.
Traditional 510(k) of Fetal & Maternal Monitor
014_14.1_F15_Series_User_Manual
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