2Introduction Welch Allyn® RetinaVue® 100 Imager
Best practices general recommendations
The following are general best practice recommendations for establishing durable
wireless connections between the device radio and your wireless network.
Wi-Fi
• 2.4 GHz, 802.11 b/g/n, 20 MHz channel
• WPA2-Personal with Pre-Shared Key (password) authentication
• WPA2-Enterprise with PEAPv0/MSCHAPv2 (user name and password) authentication
Network (TCP/IP)
• The RV100 uses only IPv4
• DHCP required, Static IP on RV100 is not supported.
• Ensure that DHCP provides IPv4, Netmask, Default Router (gateway) address and
a minimum of one DNS server address.
Best practice Affected types Without best practice
Signal Strength In areas the device radio is expected to operate the
RSSI Value ≥ -65dBm for wireless signals (measured when 802.11 APs
set to 25mW).
Wireless Dropped packets and loss of connectivity requiring
excessive re-sends due to poor wireless coverage.
Signal to Noise Ratio (SNR) ≥15dB. Wireless High noise level causes dropped packets.
Spanning Tree Protocol (STP) STP should be turned off for the
Welch Allyn specific VLAN/SSID.
Wireless Dropped connections, loss of connectivity resulting
in no data sent or excessive re-send attempts.
WLAN Optimization
• Controller CPU utilization < 40%
• Radio channel utilization < 40%
• Number of SSIDs per AP ≤ 4
• Number of clients per AP ≤ 25
• AP Received packet error rate ≤ 100%.
Hardware,
wireless
When network performance is outside
recommended parameters, potential loss or
corruption of data.
The DNS server address is not displayed on RV100 Network Screen.