Dell PowerConnect W-IAP92 Dell Instant 6.1.3.4-3.1.0.0 User Guide - Page 101

Table 15 Device Summary and Channel Information (Continued) Column Description Channels-affected Signal-strength Duty-cycle Add-time Update-time Radio channels affected by the wireless device. Strength of the signal sent from the device, in dBm. Device duty cycle. This value represents the percent of time the device broadcasts a signal. Time at which the device was first detected. Time at which the device's status was updated. Non-WiFi Interferers The following table describes each type of non-Wi-Fi interferer detected by the spectrum monitor feature. Table 16 Non-Wi-Fi Interferer Types Non-Wi-Fi Interferer Description Bluetooth Fixed Frequency (Audio) Fixed Frequency (Cordless Phones) Fixed Frequency (Video) Fixed Frequency (Other) Frequency Hopper (Cordless Base) Frequency Hopper (Cordless Network) Frequency Hopper (Xbox) Frequency Hopper (Other) Microwave Any device that uses the Bluetooth protocol to communicate in the 2.4 GHz band is classified as a Bluetooth device. Bluetooth uses a frequency hopping protocol. Some audio devices such as wireless speakers and microphones also use fixed frequency to continuously transmit audio. These devices are classified as Fixed Frequency (Audio). Some cordless phones use a fixed frequency to transmit data (much like the fixed frequency video devices). These devices are classified as Fixed Frequency (Cordless Phones). Video transmitters that continuously transmit video on a single frequency are classified as Fixed Frequency (Video). These devices typically have close to a 100% duty cycle. These types of devices may be used for video surveillance, TV or other video distribution, and similar applications. All other fixed frequency devices that do not fall into one of the above categories are classified as Fixed Frequency (Other). Note that the RF signatures of the fixed frequency audio, video and cordless phone devices are very similar and that some of these devices may be occasionally classified as Fixed Frequency (Other). Frequency hopping cordless phone base units transmit periodic beacon-like frames at all times. When the handsets are not transmitting (i.e., no active phone calls), the cordless base is classified as Frequency Hopper (Cordless Base). When there is an active phone call and one or more handsets are part of the phone conversation, the device is classified as Frequency Hopper (Cordless Network). Cordless phones may operate in 2.4 GHz or 5 GHz bands. Some phones use both 2.4 GHz and 5 GHz bands (for example, 5 GHz for Base-to-handset and 2.4 GHz for Handset-to-base). These phones may be classified as unique Frequency Hopper devices on both bands. The Microsoft Xbox device uses a frequency hopping protocol in the 2.4 GHz band. These devices are classified as Frequency Hopper (Xbox). When the classifier detects a frequency hopper that does not fall into one of the above categories, it is classified as Frequency Hopper (Other). Some examples include IEEE 802.11 FHSS devices, game consoles and cordless/hands-free devices that do not use one of the known cordless phone protocols. Common residential microwave ovens with a single magnetron are classified as a Microwave. These types of microwave ovens may be used in cafeterias, break rooms, dormitories and similar environments. Some industrial, healthcare or manufacturing environments may also have other equipment that behave like a microwave and may also be classified as a Microwave device. Dell PowerConnect W-Series Instant Access Point 6.1.3.4-3.1.0.0 | User Guide Spectrum Monitor | 101