Status  -  Com Ports     (MM->7->6)

PORT #1                                 
 PORT #2    4? 02 ;? 02    57 02 ;? 00
 PORT #3                TX <0 4; 6> 02
 PORT #4

This status screen shows Tx (transmit) and Rx (recceive) data being pased on each serial port.  This is very usefull in diagnosing communication problems to see if data from the central office is being received by the controller.  Data values are shown as hexadecimal numbers.