I was recently introduced to Cognio, a company that is able to help companies looking to deploy WiFi telephony or VoWiFi in their organizations. The company has something called Spectrum Expert that monitors your WiFi network for interference from devices on the network. It then sounds an alarm when there is a problem and locates the offending device. Amazingly it can detect interference from cordless phones that don’t operate on WiFi.
As WiFi telephony becomes a larger market it is without question that such a device will be needed to ensure smooth WiFi operation.