The digital 'sign' has become quite predominant as a display and advertising medium.With their rotational venue of advertisers, the digital sign is a 'passive' medium, whose mission is to impart an impression to the viewer.

There are 4 modalities which determine the effectiveness of the digital sign:

• Positioning:   they are usually mounted high, above the crowd.
• Non-Interactive:   The medium does not draw the user into it to engage in the content
• 'Looped' Content:   Your chance of being seen may be 1 out of 50 or so advertisers.
• Non-Trackable:   no way of knowing who saw any particular advertiser, or the screen itself.

By Contrast:
An Interactive E-Port station is;  a crowd-level display, hosting 1 theme, providing an engaging interactive theme, and provides highly trackable activity logs of times-of-use, email database, and more.