There are 2 kinds of Ports, Physical Port and Logical Port. A physical port is located on computer and telecommunication devices where you can physically connect to some other device, usually with a socket and plug of some kind. Logical port is a term used in programming. It is a logical connection place like on a router interface when you login you see SIP ports or RTP ports, Ports required by Blueface are UDP 5060-5061 for VoIP and UDP 10000-20000 for voice.