How It Worked
In a GE Marc V system:
- electronics that determine which channel a conversation will occur on are inside each radio. Radios scan all available channels in the system to find an unused channel for a conversation. They also scan to look for a tone sequence initiating a conversation from another radio in their own group.
- repeaters are essentially stand-alone repeaters, except for tone handshaking electronics, deadbeat disable computer, telephone patch equipment, or equipment used to bill air time, (talking time). Some of these were options.
- because call set up was slower than transmission-trunked systems, repeaters had a long hang time in order to hold a group's mobile radios on a channel until a conversation was finished. This conversation trunking was the primary difference between Ge Marc V and other systems.
- a trunked system or area could have up to 20 channels. Some 100-channel models, for example, could accommodate five 20-channel areas.
- the user would hear a low-pitched error tone if they took the microphone off hook and no channels were available or the radio was out-of-range.
Read more about this topic: GE Marc V
Famous quotes containing the word worked:
“There is something singularly grand and impressive in the sound of a tree falling in a perfectly calm night like this, as if the agencies which overthrow it did not need to be excited, but worked with a subtle, deliberate, and conscious force, like a boa-constrictor, and more effectively then than even in a windy day.”
—Henry David Thoreau (1817–1862)