Around him, soft green hills stretch to the horizon, descending into cool glades crowded with broad-trunked, 400-year-old oak trees.

BBC: The road to Hollywood, California

For additional redundancy, the two central switches each have two Gigabit Ethernet-trunked connections to three more CoreBuilder 9000 switches.

CNN: Gigabit Ethernet meets Van Gogh at Christie's

Trunked radio is digital, allows more efficient use of spectrum, and does not tie a radio to a specific talk channel.

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Launched in April, the 1, 000-node network is anchored by two redundant 3Com CoreBuilder 9000 switches interconnected by dual 1Gbps Gigabit Ethernet-trunked connections.

CNN: Gigabit Ethernet meets Van Gogh at Christie's

All of these systems, whether trunked or conventional, are push-to-talk, meaning that only one user can speak or listen at one time.

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Special and expensive digital handsets are required to talk on trunked systems.

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In 2000, our Governor determined that we should implement the first statewide digital trunked radio system in the United States, utilizing primarily Motorola mobiles, portables and base station equipment which was then state of the art.

FORBES: Free Speech v. Denial Of Communications For Public Safety Agencies?

Whereas traditional systems require the use of one or two dedicated channels per user every time there is a two-way communications, trunked systems automatically select the voice channel that a user may talk on every time he transmits.

FORBES: Free Speech v. Denial Of Communications For Public Safety Agencies?