Welch Allyn Connex and Acuity Network Installation Best Practices , User Manual - Installation Guide - Manual (Page 18)

14 Acuity Welch Allyn Network installation
Validation
Criterion Measures Requirement
Device connectivity A patient monitor needs to be attached to the
system during signal testing to ensure
dropout does not occur in edge conditions. The patient monitor should remain
connected without any extended gaps
of greater than 4 seconds and should
not completely disconnect from the
network at any time during the test.
First signal strength The received signal strength of the nearest AP RSSI
-65dBm
Network up-time Amount of time the network transporting
patient data is available during any 24 hour
period Up-time
 99.9% over a 24 hour period
Packet latency Round-trip peak network latency between
Acuity Central station and its patient monitors Latency should be
800ms
Packet-to-packet jitter Jitter times between packets Packet-to-Packet
400ms
Second signal strength The received signal strength of the next
closest AP RSSI
-70dBm
Signal to Noise Ratio (SNR) The difference between the received signal
strength and the detectable noise floor
15dB
UDP broadcast The ability to communicate with the central
Acuity monitoring station and patient
monitoring devices UDP Broadcasts between ports 7711-
7720 should be in pass-through mode
rather than store-and-forward mode
The validation process begins immediately following the Acuity System installation. Many
of the criteria used to ascertain the stability and usability of the installed system have
been covered previously in this document. Testing of these criteria involve the use of a
laptop utilizing AirMagnet Surveyor Pro and an 802.11a wireless card. The basic testing
requirements are listed in the table below. This testing is standard across all installed
802.11a systems installed by Welch Allyn.
WLAN Optimization Cisco recommends the following:
•
Controller CPU utilization <50%
• Radio channel utilization <33%
• Number of clients per AP
25
• Controller memory utilization <70%
• Average RSSI of all clients
-67 dBm
• AP Received packet error rate <10%.
Hardware,
wireless When network performance is outside recommended
parameters, potential loss or corruption of data.
Best practice Affected types Without best practice