For all of their conveniences, wireless networks can suffer from interference. Cordless phones, wireless game controllers, fluorescent lights, microwave ovens, Bluetooth devices, cordless headsets, and even the neighbor’s wireless network can all interfere with your wireless network.

This interference occurs when devices emit signals into the same frequency that your network uses. For example, many cordless phones use the same 2.4GHz band used by 802.11b and 802.11g networks. Even 802.11n devices, which use the 5GHz band, aren’t immune to interference, because some cordless phones, radar, and satellites also use this band.

To help decrease interference, don’t place your wireless router near the aforementioned devices, and if you suspect you’re receiving interference from a network outside of your home, try moving your router to a more central point inside your home. You can also try changing the Wi-Fi channel on your wireless devices, which can help to avoid interference from in-home devices. Finally, angling the antennas on your routers or wireless adapters can help to ensure better reception.

If you’re in the market for a new cordless phone, buy a phone that uses a frequency different from your network’s frequency. Better yet, consider buying a phone that uses DECT 6.0, a new protocol that’s designed to avoid interference with other wireless networks. As an added bonus, DECT 6.0 features improved voice quality, range, and security over other cordless phone technologies.

Tags: Mobile Wireless, Bluetooth, Wireless-N