If you click Yes to add server details, another window will be presented asking you to Add a Server. If you click Add Server you will be asked for Server and user details. This is required to add a device if you are using [Asterisk edition] of Flexor CTI.
Please click on this link
to the guide for instructions
on what to do next. If you are not the administrator of the Asterisk
server you will need to contact them for the relevant information, such as AMI User Credentials and Server IP Address.