Hi lalrl,
In genesys there are two services related with this issue. One of them is URServer and the other one is Tserver services.
When UR(UniversalRouting) Server is down, the calls in routing point queue, wait forever and No CDINI is working.If in this case T server-service is down then CTI group is no longer monitored by genesys and so the calls are routed to CDINI direction. But in this case, if you have 10 customers waiting at that time , they can not divert to CDINI direction. They wait forever. It affects only the new calls after CDINI works..
Your last sentence is the case...
"what happens, if call is already placed in queue and in this moment T-Server fails...?!"
This is what i want to tell. These calls wait forever till they abandon.
By the way, now i am testing the CTI group with adding member on it. I added one ADN on it. observe it and saw no problem. But i'm not sure if Genesys routing strategy will be having problem about this CTI group.
If routing point works without any problem, then i'll thank to mundus for his help

Because this will be a solution for us.