A complex filter such as the channel select filter in a radio transceiver is implemented using a transconductanceC topology to benefit from the ability to tune such filters and thereby stabilize the output transfer function of the filter over variations in temperature, power supply voltage and process. The housing may have an interior in or through which the point of contact may be accessed and an anterior opening for access to the interior. The first shutter opens and closes the first opening. It is then determined whether the server is in a compromised state by, remotely from the server, comparing the provided indication to one or more expected indications.