1. An apparatus comprising: a device to be contained in a security system for a building; wherein the device includes circuitry to receive a signal from a sensor indicating an alarm condition and circuitry to transmit, based on receipt of the signal, a message to a remote device indicative of the alarm condition; wherein the message is an email or a message suitable for presentation on a cellular telephone device; wherein the device further comprises command interpretation circuitry to monitor a communication channel for a reply message, the communication channel being an Internet connection or cellular telephone service, to determine a command based upon the reply message, and to communicate with action execution circuitry to execute at least one action based upon the command.