sip trunk CUCM-LYNC

i have CUCM 8.0.2  and skype for business and they have sip trunk to each other 

update cucm 8.0.2 to 10.5 and after update all sip trunk to other site is ok but have problem  between CUCM and LYNC trunk

when i call to Lync user after one bip the call is end and lync user see just miss call from cucm

Sign In or Register to comment.