Repeaters

摘要

The first Internet linking experiments started with Iphone in 1996. Iphone was a commercial piece of software from VocalTec. As support for Iphone dropped, amateur-developed software took over. There are now three 'systems' in use, namely eQSO, Echolink and the Internet Radio Linking Project (IRLP). All three systems assist in amateur radio communications by using Voice Over IP (VoIP) technology. This is carried over the Internet to computers connected to transceivers allowing on-air users using VHF and UHF frequencies to achieve contact distances far in excess of those that they would normally on these bands. Echolink and eQSO also permit users to connect directly from their home computers, whereas IRLP is aimed at developing a network of nodes/ repeaters that are only accessible using radio.