Question T8C09
From subelement T8 - T8C
Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?
Why is this correct?
EchoLink is correct because it allows you to connect to repeaters using computer software or smartphone apps, not requiring a radio to initiate transmission. IRLP requires a radio and DTMF tones for access. D-STAR and DMR are digital radio protocols that still require radio equipment to transmit through repeaters.
Memory tip
Look for the key phrase 'without using a radio to initiate.' This distinguishes internet-based access (EchoLink) from radio-dependent systems (IRLP, D-STAR, DMR). When protocols mention computer or smartphone connectivity, they typically bypass traditional radio transmission requirements.
Learn more
EchoLink's unique capability stems from its dual-access design: licensed operators can connect via internet applications while maintaining amateur radio frequency privileges through repeater nodes. This creates a hybrid system where voice over internet protocol facilitates global communication through local repeater infrastructure, expanding coverage beyond traditional radio frequency limitations while preserving amateur service protocols.
Think about it
Why do you think EchoLink requires call sign verification and license proof if it doesn't require a radio to access the system?