When we use Siemens Gigaset towards Avaya IP DECT R4 we get a wierd scenario. Everything works just fine, but when you recieve or make a call from the Gigaset, the incoming or outgoing number is viewable for about 0,3 seconds, then the screen goes blank. If we let the phone ring, the number reappears after exactly 20 seconds. None of the timer in IPO Manager is set to 20 sec as far as I have seen.. Anyone who know what is happening? Thanks!