Wireless Pir Sensor

My wireless router (BT Hub) keeps cutting, which has passed since I installed a burglar alarm wireless.
The alarm is completely wireless;
(6 x PIR Sensor 4x magnetic door 1xRemote, 1xExternal Strobe / sounder)

All answers on this?

Set the alarm for a few days and see if the problem disappears. If not, you know at least it's not the alarm

It could be because the wireless signals are mixed up with each other or the alarm drains the power of the network, but because the BT Hub takes on great