| Similar to IRLP (Internet Relay Linking Project), EchoLink uses a computer interface to communicate with other amateur radio stations. Both of these newer concepts use the Internet and a network protocol called VoIP (Voice over IP). EchoLink is easy and works with the popular Microsoft Windows operating systems and can be use on virtually any PC with an Internet connection. Neither IRLP nor EchoLink need much bandwidth for good communication and both will work quit well with "dial-up" connections. IRLP does work better with higher speed connectivity and a necessity for the reflectors where multiple VoIP connections are possible. EchoLink can be downloaded and installed in a matter of minutes; see the link below. It has been designed to permit a simple PC connection or the more elaborate connection which integrates an existing simplex or repeater station. Using the latter, one needs a RAS (Remote Access Service) configured for auto-dial or an "always" on Internet connection. This is because users of a simplex station or repeater (linked or standalone) system access the EchoLink computer interface using DTMF or other coding control system. Similar to IRLP, Echolink has "node" numbers. The W9PCi EchoLink node is 50248. Node numbers or call sign may be used for directed connection. EchoLink also offers connections to multiple stations using a "conference" connection. This can be compared to the IRLP Reflector nodes. EchoLink requires that at least two UDP (User Datagram Protocol) ports to remain open for unsolicited IP traffic. Most firewalls, routers and the newer Microsoft XP operating systems use an Internet Connection firewall configuration that prohibits this type of unsolicited traffic from entering your PC. Special attention must be taken to permit a "tunnel" for the ports used by EchoLink. Documentation is provided to help users of most levels to setup there PC's properly. When you download and install this software, you are asked for your amateur radio call and some additional information that serves to verify that the call entered in the EchoLink data base is "legitimate". After you call is verified, you will be able to connect to the EchoLink servers and begin using a new and exciting form of communication using the Internet and your PC and/or radio. | 
