Walkie-Talkie and Radio vocabulary
In English, when a person uses a walkie-talkie or a radio to communicate there is often a special kind of vocabulary and pattern of speech that is used. For example, perhaps to start I will say "Calling ____", such as "Calling all residents of Shanghai, calling all residents of Shanghai." When I finish speaking I will say "over", such as "what is your location? over." When the conversation is completely over I will say "over and out", such as "Okay John, I will see you there. Over and out."
Are there similar conventions in Chinese?