Hello! Unfortuanatelly, I couldn't cope with making calls to SIP accounts. Only PSTN directions works. When I try to dial SIP number email@example.com from 3CX Voip Phone I receive 'Destination not found' answer. 3CX log here: 13:04:42.326 [CM503008]: Call(65): Call is terminated 13:04:42.296 [CM503015]: Call(65): Attempt to reach <sip:firstname.lastname@example.org:5060> failed. Reason: Not Found 13:04:42.296 [CM503014]: Call(65): No known route to target: <sip:email@example.com:5060> 13:04:42.256 [CM503010]: Making route(s) to <sip:firstname.lastname@example.org:5060> 13:04:42.246 [CM505001]: Ext.101: Device info: Device Identified: [Man: 3CX Ltd.;Mod: 3CXVoipPhone;Rev: General] Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [3CXVoipPhone 3.1.6288.0] Transport: [sip:127.0.0.1:5060] 13:04:42.216 [CM503001]: Call(65): Incoming call from Ext.101 to <sip:email@example.com:5060> As I can see my called SIP which is firstname.lastname@example.org is changed to uncertain SIP destination email@example.com:5060 I dial external number but it seems like 3CX consider it's as a local one. No any outgoing calls possible - nor via the other registered voip provider accounts (like firstname.lastname@example.org) nor from extension number. I need only to call to external SIP direction, no incoming calls needed to my extension numbers. It's general feature for voip on SIP standart and it works in other softphones good, i.e. in X-Lite. Am I doing something wrong or it feature hasn't been implemented by 3CX by now? Is it possible to make such outgoing SIP calls worked? I would high appriciate any answers! Thank you.