two way radio calls

Description

two way radio calls are instantaneous, push-to-talk (PTT) voice transmissions between handheld, mobile, or base stations, allowing users to send and receive messages on shared frequencies. Operating via UHF/VHF, they offer direct, reliable, and durable communication, commonly using analog or digital signals for quick, coordinated group interaction. 

Key Characteristics of Two Way Radio Calls

• Push to talk (PTT): The user presses a button to transmit and releases it to listen, making it faster than dialing a phone.
•  Half- Duplex Communication : Only one person can talk at a time, requiring users to take turns on a channel.
• Group Communication :  Multiple users on the same channel can hear the communication, facilitating group coordination.
• Direct or System- Based ; Calls can be unit-to-unit (radio to radio) or routed through a repeater for extended range.
• Durability and Reliability : Ideal for rugged environments like construction, security, or outdoor activities where cellular coverage is poor. 

Types of Radio Calls

• Individual Call: A private, one-on-one call between two users.
• Group Call :  A call sent to a specific, predefined group of users, commonly used in business or emergency services.
• All Call:  A broadcast to every radio within range or on the system.
• Emergency Call:  High-priority calls often with pre-emptive access to the channel. 

Common Radio Terminology (Etiquette)

• ” Over” – I have finished speaking and am waiting for a response.
•  “Roger/ Roger That’ – Message received and understood.
•  “Wilco” – Abbreviation for “will comply,” meaning the message is understood and will be acted upon.
•  ‘ Stand B’ – I am busy, but will get back to you shortly.
•  “Break, Breal” – Used to interrupt a conversation for an urgent, non-emergency message.
• “Copy” – I understand.
•  “What’s your 20?” – A common, though less formal, phrase for “What is your location?”. 

Basic Operation

1.  Check the channel : Ensure the channel is clear to avoid interrupting existing conversations.
2. Push to talk : Press the PTT button, wait a second for the transmission to connect.
3. Speak Clearly: Speak directly into the microphone at a normal volume.
4. Release to listen : Release the button immediately when finished to hear the reply.