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TOPIC 2.1 MOBILE DEVICE, Cellular WAN
To connect a laptop to a cellular…
TOPIC 2.1 MOBILE DEVICE
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Laptop Components
Monitor, Fn key, and Function keys F1 through F12
- A laptop monitor is a built-in LCD. A desktop monitor can be added to a laptop
- The Fn key is used to activate a second function on a dual-purpose key.
(Accessed by pressing the Fn key in combination with another key is printed on the key in a smaller font or different color)
- The purpose of the Function keys F1-to-F12 depends on the operating system and the application running.
- Port Replicator - may contain a SCSI port, a networking port, PS/2 ports, USB ports, and a game port.
- Docking Station - has the same ports as a port replicator, but adds the ability to connect to PCI cards, additional hard drives, optical drives, and floppy drives.
A laptop connected to a docking station has the same functionalities as a desktop computer.
Laptop Display Types
Laptop monitors are built-in displays.
There are four types of laptop displays:
- LCD - Liquid Crystal Display
- LED – Light Emitting Diode - uses less power and has a longer lifespan than LCD monitors
-OLED - Organic LED
- Plasma – rarely used in laptops due to high power consumption
Backlights, Inverters and Wi-Fi Antenna
- Inverter converts DC power to the higher voltage AC power that is required by the backlight
Backlight shines through the screen and illuminates the display.
- Two common types of backlights are cold cathode fluorescent lamp (CCFL) and LED.
- Cold cathode fluorescent lamp (CCFL) are used in LCD monitors
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Cellular WAN
To connect a laptop to a cellular WAN, you install an adapter that is designed to work with cellular networks.
- Cellular WAN cards are plug-and-play.
- Can be plugged in to the PC card slot or is built in to the laptop.
- Access with a USB adapter or by using a mobile hotspot.
Require no software installation and no additional antenna or accessories.
Wi-Fi
a wireless technology that provides a simple connection from anywhere within the range of a base station.
- Connection distances of 300 feet (91 meters) or more, depending on the environment
- Ease of access makes Wi-Fi a simple solution for network connectivity.
Laptops access the internet by using wireless adapters
- Mini-PCI - Commonly used by older laptops. Mini-PCI cards have 124 pins and are capable of 802.11a, 802.11b and 802.11g wireless LAN connection standards
- Mini-PCIe - Most common type of wireless card in laptops. Mini-PCIe cards have 54 pins and support all wireless LAN standards.
- PCI Express Micro - Commonly found in newer and smaller laptops, such as Ultrabooks, because they are half the size of Mini-PCIe cards.
