Software / Other / BigMouth / 09


                               Check for ring

Func AX	09h
Param DX	None
Return AX	1 ring energy present 0 no ring energy present
Delay	100ms

        Check for ring energy on the line.  Can be tripped by noise on
        line or an extension picking up.  Should be implemented in a loop
        that will drop out when upon detection and call RING_WAIT to
        determine if a ring is actually occurring.