Unwanted Miss Calls Display

I have a setting where i have both softphone in my laptop and a hardphone on my desk. They share the same ext and ring at the same time whenever there is an incoming call. It works great but the problem is if i pick-up the call either on my softphone or hardphone, the other phone will display Miss Call which could be very misleading. Anyway to remove that notifications if a same ext is shared amongst a few devices?