1. A device for electronic access control and surveillance, comprising: an electronic access control (EAC) module including a reader for reading a user's asserted identity, the EAC module controlling physical access through a portal between a secure area and a non-secure area, the EAC module generating access control data; an imager having an integral camera for continuously surveilling an observation area proximate to the portal and generating at least one of image data and video data; a data port disposed proximate to and electrically coupled to the EAC module and the imager, a data signal provided at the data port, the data signal comprising EAC data for the portal and at least one of the image data and video data of the continuously surveilled observation area; an analytics module that analyzes the at least one of image data and video data to determine a number of people or objects passing through the portal and that analyzes the EAC data to determine information related to the physical access through the portal, the data signal further comprising tailgating data generated at the analytics module; a housing having an interior region, wherein the EAC module including the reader, the imager including the integral camera, and the analytics module are co-located in the interior region of the housing at the region proximal the portal; and a power connection extending from the housing that provides power to the EAC module, the imager, and analytics module; the EAC module including at least one sensor that reads a user's asserted identity of the EAC data and determines an open state and a closed state of the portal, the EAC module granting the physical access through the portal, the EAC module further including an input/output (I/O) module that actuates a door solenoid in response to the EAC module granting the physical access through the portal, the analytics module activated to determine the number of people or objects passing through the portal in response to the EAC module granting the physical access through the portal and in response to the EAC determining the open state of the portal and deactivated in response to the EAC determining the closed state of the portal, wherein the imager continuously surveys the observation area proximate to the portal at least prior to the I/O module actuating the door solenoid and a detection of an entry through the portal.