Pause between successive incoming rings on my phone line is 4 sec, so when x101p do not receive next ring signal after 4.5 sec, call should be consider as ended. But, if caller hang-up, call is ended (Hungup 'Zap/1-1) exactly 8 sec after last ring, and my voip phone continues to ringing during that time (that's bad). I want to cut that time to 4.5 sec. How to do that? I tried to change in zapata.h some lines: #define ZT_DEFAULT_RINGTIME 500 #define ZT_LOOPCODE_TIME 3000 #define ZT_RINGOFFTIME 2000 but with no effects. Call is still ended 8 sec after last ring.