Electric gate
Can be made from wood or iron and is electrically powered or controlled. The gate is used to create a barrier which can separate public roads form private driveways or to limit access to any place either by vehicle or pedestrians.

Electronic Surveillance
An electronic device, such as a television, digital video recorder or video camera, which is used to monitor activity or other changing information from a distance. Often used to enhance security of property and valuables as well as to detect or prevent crime.

Emergency Phone
Used with a CCTV security system. The monitor allows you to view the output from several cameras at the same time.

Door alarm
A designated phone, usually with its own line, for the purpose of making calls to contact emergency services.

Emergency Response
When an ambulance, police, fire department or other emergency service responder takes the necessary steps to respond to a call for assistance.