the tes as is the number of retry times for dialing the number also alarms may be enabled or disabled e g for maintenance purposes in the event of an alarm the preferred embodiment tes reports the alarm by calling a previously designated location which may be a fax machine a terminal connected through a modem an alarm company or to a pager if the location does not answer the call or the number is busy the control unit repeatedly hangs up and redials the same number until the system connects or until the redial retry number is met if alternately a direct connection is provided to a computer printer or other reporting device the tes reports the alarm condition occurrence directly posting or printing a message that indicates the occurrence e g on the attached printer fig6 shows upper electronics assembly 180 in an internal view of an open main control unit 116 the upper electronics assembly 180 includes a detachable handheld keypad 182 and a display 184 which may be a liquid crystal diode lcd display a pluggable memory module 186 is shown inserted at the top of the upper electronics assembly 180 the pluggable memory module 186 is preferably flash electronically programmable read only memory flash eprom local audio communications may be effected in an intercom like or speaker phone fashion through the faceplate of.