I've bee trying to get this working over the past few weeks without success...
I've manually configured a UC520, have a couple of phones set up and working, in/outbound & internal calls working fine.
Have directed my PSTN line to x101...works OK, redirects to CUE OK.
Have setup a SIP trunk via my ISP and have directed it to x101....works OK, however forwarding to CUE fails with a message played by my ISP
Also getting no MWI notification, and not detecting call release...grrrrr....
Been pulling out what hair I have left with different configs....no doubt its starring right at me....time to ask for assistance....