MAC OSX Airport is a powerful tool to explore the 802.11 information from the wireless interface. I used a form of this command to troubleshoot a roaming issue in a client’s emergency department with their Patient Access Services WOWs (Workstations on Wheels). I was able to see my test device’s 802.11 statistics. With a slight … More OSX Wireless Airport Tool and Roaming
I needed to test and suggest an enclosure for a behavioral psychiatric ward. The Oberon 1076-WA Enclosure withstood some abuse but the metal deformed. Here is the Video! The Oberon 1076-WA Enclosure withstood the abuse but the metal deformed. The other thing I noticed is that the 1076-WA shipped with the unit locked with … More Stress Test of the Oberon 1076-WA Enclosure
This is a non-scientific study of the resillency of the Oberon 1020-00 NEMA Enclosure. I have a behavioral psychiatric ward wireless design scheduled and I need to recommend an enclosure. I reached out to the nice folks of Oberon and they sent me an enclosure to test for the project. The test was three hard strikes from … More Stress Test of Oberon 1020-00 NEMA Enclosure
The idea was proposed on Twitter of wireless “Contention Zones”. A wireless “Contention Zone” is the purposeful channel design grouping access points (AP) configured for the same channel in close proximity. The 802.11 (WiFi) protocol uses several mechanisms to determine if the frequency is clear for a transmission opportunity (TxOp) or if the AP station … More Wireless Contention Zones: WiFi Hooey? OR Slicker Than Frog Snot?
The Behavioral Psychology Rooms are hardened construction to prevent patients from possibly harming themselves or others. The rooms have to go through a certification process which limits the placement and design for wireless access points (AP). The construction of the room is hardened in the following ways: Ceiling is drywall plus 20 gauge sheet metal. … More Hardened Behavioral Psychiatric Rooms
While doing wireless engineering work for a large hospital system, a problem added to my radar. The workstations on wheels (WOWs) were intermittently disconnecting from the wireless network. The client electronic medical records (EMR) application session would disconnect. The WOWs used an external USB wireless dongle. Specifically the ASUS USB-AC56. This dongle on the manufacture’s … More Bad WiFi? Check the Client
Necessity creates invention and inspiration. I needed to formalize my design methodology to assist with communication to my employers. I defined the sites into Large, Medium, and Small categories. Defined the sites, prerequisites, and design steps. Every project is a bit different, but I feel that having a framework provides a good place to start … More Wireless Design Methodology