Hi, Support, I found that `dialog.local.uri` is not matched UAC uri. We can create dialog via calling `createUAC`, ``` createUAC(uri, ...) ``` And in the dialog, ``` this.local = { uri: 'uas' === type ? opts.sent.getParsedHeader('Contact')[0].uri : this.req.uri, ... } ``` `this.req.uri` is same with the first parameter of `createUAC`, So it is not local, it means remote, UAS. Please fix this ASAP.