24 Making callsMaking and receiving callsLimiting call time (transmit timer)Your radio may limit the amount of time you can talk(transmit) continuously, if it is programmed in this way.This is known as the transmit or time-out timer andallows other radio users to make calls on that channel.The radio warns you before the transmit timer expiresby beeping three times. Also, the red status LED flashesand a message appears in the display:Finish your conversation as soon as possible and releasethe PTT. For a short time, your radio may prevent youfrom transmitting to allow other radio users to makecalls on the channel.Understanding talkgroupsNote: This feature is available for digital channels only.Talkgroups are a collection of people (radio IDs) withwhom you want to have private conversations asa group.For example, a state's public safety agencies could havethe following talkgroups:Q Local talkgroups—used by a specific agency to com-municate within their own local agency. It may evenbe made up of a county of public safety officers.Q Regional talkgroups—used by large state agenciesthat have regional divisions.Q Statewide talkgroups—used by an agency to com-municate with a public safety member in anotherregion. Statewide talkgroups, as their name sug-gests, enable public safety agencies to communi-cate with each other from one end of the state tothe other.Transmit timeoutimminent