User's Manual

45!
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Chapter!9.!-!Selective!calling!
Some!time s!when!you're!working!with!larger!groups!of!people!using!th e!same!channel,!things!
can!get!very!crowd ed,!very!fast.!To!minimize!this!problem,!several!methods!of!blocking!out!
unwanted!transmissio ns!on!your!frequency!have!developed.!In!general,!th ere !are!two!forms!of!
selective!calling!in !two-way!radio!system s:!Group!calling,!and!individual!calling.!
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Group!calling,!as!the!name!suggest,!is!a!one-to-many!form !of!co mm un ication.!Every!radio!in!
your!working!group!is!configured!the!sam e!way!and!any!ra dio !will!make!contact!with!every!other!
radio!in!the!grou p.!
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Individu a l!calling,!some!times!also!known!as!paging,!is!a!one-to-one!form!of!communication.!
Every!ra dio !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.!
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The!BTECH!GMRS-V1!features!th ree !differe nt!w ay s!of!gro u p!ca lling: !
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CTCSS!
DCS!
Tone-burst!