View source for ESPA 4.4.4

ESPA is a protocol controlling wireless pagers. It uses ISO 1745, point-to-point on RS232 as data link layer. The AlphaCom can use this in two ways:
* Output: Sends a “start paging” message either due to manual or automatic action.
* Input: The AlphaCom can be set up to look like a pager transmitter. The AlphaCom inspects the display text and generates events to the Event Handler which do a range of actions. (“Fire Alarm protocol”).