Which term describes a radio system that dynamically assigns channels to avoid congestion?

Which term describes a radio system that dynamically assigns channels to avoid congestion?

• A. DIDO
• B. Interoperability
• C. Multiplex
• D. Trunked

Answer: (D)

Dynamic channel assignment to prevent congestion is what a trunked radio system does. In this setup, a centralized controller manages a pool of voice channels and uses a control channel to coordinate access. When someone wants to speak, the system quickly assigns an available channel from the pool and connects the call, returning the channel to the pool when the transmission ends. Because many users share the same pool of channels rather than each group having fixed frequencies, the system can handle a larger number of conversations with fewer total channels, reducing the chance of all channels becoming busy and speeding up call setup. This approach also supports features important in emergencies, like talk groups and priority handling, which help ensure critical communications get through even under heavy load. Other terms describe different ideas: DIDO isn’t about dynamic channel allocation, multiplex refers to combining signals for transmission, and interoperability is about the ability of different systems to work together, not the mechanism for assigning channels.

Dynamic channel assignment to prevent congestion is what a trunked radio system does. In this setup, a centralized controller manages a pool of voice channels and uses a control channel to coordinate access. When someone wants to speak, the system quickly assigns an available channel from the pool and connects the call, returning the channel to the pool when the transmission ends. Because many users share the same pool of channels rather than each group having fixed frequencies, the system can handle a larger number of conversations with fewer total channels, reducing the chance of all channels becoming busy and speeding up call setup. This approach also supports features important in emergencies, like talk groups and priority handling, which help ensure critical communications get through even under heavy load. Other terms describe different ideas: DIDO isn’t about dynamic channel allocation, multiplex refers to combining signals for transmission, and interoperability is about the ability of different systems to work together, not the mechanism for assigning channels.