Hi PBX_Tech,
thanks for your info.
But it doesn't work. I changed in the user group options HUNT MEMBER SERVICE.
In my hunt group I made 3 extensions. 2 of this extensions have a multi ring: one with a WEWoIP and the other with a DECT (SIP 3rd party)
The hunt group is programmed SEQUENTIAL
The call comes in, the first phone and the WEVoIP is ringing but then the call doesn't goes to the 2.nd group-member after the programmed time.
When I switch HUNT MEMBER SERVICE to disable, the hunt group works properly.

Any idea?