I have used a BT Voyager 2110 wi-fi router for some time without any problems.

For security I hide the SSID, use MAC filtering for the two desktops and one laptop in my household and WPA-PSK encryption.

The setup utility security page has an item "WPA Group Rekey Interval" which has a default setting of 0 seconds. I cannot find out what effect this parameter has. The BT help line was useless, the guy I spoke to knew less than me about encryption and, after disappearing for 5 minutes while I held on, he came back and said I could ignore the setting. So I told him this clearly meant he didn't know what the parameter is.

Can anyone here enlighten me please?