Timeout no answer in GXP1610


Is there any Way to change the no answer to timeout on a GXP1610 to something like 15 secs.?

I want that if the person is not in place forward to his/her cellphone, it does but it takes around 45 seconds



the non-response time on the inside can be found in extensions/features -> Ring Timeout
it could be that you also have to modify the system one on General settings and the internal one of the phone itself.