When a setting relating to the print quality of a printer 3 is changed (T601), sending of ssdp:byebye to PCs 2 (T603) and time measurement by a timer 37 (T605) are executed. Then, after the elapse of 30seconds from the start of time measurement by the timer 37, ssdp:alive is sent to the PCs 2 (T615)....http://www.google.fr/patents/US7440125?utm_source=gb-gplus-shareBrevet US7440125 - Setting information transmission/reception system
