Most WiFi enabled access points operate in the 2.4 Ghz frequency range.  This unlicensed frequency range is also shared by many common household and business devices such as cordless telephones and microwave ovens.  Use of these devices within range of your wireless enabled ISP router can cause interference and other negative effects ranging from seemingly insignificant brief Internet outages up to the need for router resets.  Internet outages lasting only several milliseconds will be disruptive to VoIP calls using a Hosted PBX or Hosted VoIP provider.

If your ISP router is equipped for wireless networking service and is not being used on your network, I recommend the wireless feature be turned off.  Turning the wireless feature off eliminates the negative effects of any interference and a potential security risk to your network.

If your ISP router is equipped for wireless networking service and is in use on your network, it could be a source of negative voice quality issues as it bypasses the necessary quality of service (QOS) management for voice traffic.  Migrating wireless network devices to a separate wireless access controller is recommended.  Further, when you use a separate wireless access controller from your ISP router, interference from other devices in the same frequency range will have no effect on the operation of your Internet router.

For more information on how you can insure the best possible VoIP call quality from your Hosted PBX or Hosted VoIP providers, please read my other blog articles.  Please let me know your thoughts in the comments section below.