not sure what a qrs is but on otis serial link equipment card reader operation or secure access(button code) will flash the light on the button for a sec but not latch the light. when floors are secured with otis ems the button will not light at all. if you dont have ems and the button doesnt light, the i/o for the 6th floor car call is probably off or misadressed. if the button does light for a sec you have security or card reader programed wrong. does the call work on phase 2? that bypasses all security and will let ya know if the call works or security.
