Hello Dears, We have a setup of 3cx v15 with patton SIP trunk and we are using Snom phones 710,715,300,320,MP etc. Everything Seems to work fine except two issues. 1.cant make or receive multiple calls. Eg.if iam in a active call another incoming call comes Line2 will start Blinking and when i pickup the call the First call will disconnect. Similarly cant make multiple outbund Calls also when i press line2 in an active Call the first call will disconect. 2. Mobile number is ringing even it is Off or unavailable.