CED Radio & Telecommunication Systems 2

Question 1

When a dispatcher receives a garbled transmission on the primary channel, what is the FIRST action they should take?

Accepted Answer

Ask the unit to repeat the transmission and identify their location

Answer

The dispatcher should request a repeat and confirm unit identity to gather the information needed before taking further action.

Question 2

What does the term 'trunked radio system' refer to in public safety communications?

Accepted Answer

A system that dynamically assigns frequencies from a pool to users on demand

Answer

A trunked radio system automatically assigns available frequencies from a shared pool, increasing efficiency and reducing channel congestion.

Question 3

Which radio transmission mode allows both parties to speak and listen simultaneously?

Accepted Answer

Full-duplex

Answer

Full-duplex allows simultaneous two-way communication, similar to a telephone call, because separate frequencies are used for sending and receiving.

Question 4

A dispatcher notices that a unit's radio transmission cuts off before the message is complete. This is MOST likely caused by:

Accepted Answer

The unit releasing the PTT button too early

Answer

Releasing the Push-To-Talk button prematurely is the most common cause of truncated transmissions in the field.

Question 5

What is the purpose of a 'talk group' in a digital radio system?

Accepted Answer

To logically group users so they communicate on a shared virtual channel

Answer

A talk group organizes users with shared operational needs onto a virtual channel within a trunked or digital network.

(CED) Certified Emergency Dispatcher Practice Test