also is there a way to extend the time limit before a all is diverted i find 20 seconds is far to short i would want around 45 seconds especially when im at work and my mobile is on my desk if it rings have to come over to my desk and see who is calling and answer or reject in 20 seconds it just aitn long enough i dont want to turn off diverting because if i dont want to talk to the person they cant leave me a message