BTECH GMRS-V2 - Chapter 9. - Selective Calling; Ctcss Dcs

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Chapter 9. - Selective Calling
Sometimes when you're working with larger groups of people using the same channel, things
can get very crowded, very fast. To minimize this problem, several methods of blocking out
unwanted transmissions on your frequency have developed. In general, there are two forms of
selective calling in two-way radio systems: Group calling, and individual calling.
Group calling, as the name suggests, is a one-to-many form of communication. Every radio in
your working group is configured the same way and any radio will contact every other radio in the
group.
Individual calling, sometimes also known as paging, is a one-to-one form of communication.
Every radio is programmed with a unique ID code. And only by sending out a matching code
can you get that radio to open up to your transmissions.
The BTECH GMRS-V2 features three different ways of group calling:
• CTCSS
• DCS
• Tone-burst