Portable communicationDevices

Done by : Arwa Alrawas

Portable communications device

A portable communications device is a hand-held or wearable device. For example, the walkie-talkie is a device that is hand-held when in use, and wearable when not in use. Portable telephones (cellular telephones) are also carried, or worn, on a belt, or in a pocket.Portable devices have also become usable when worn. For example, most walkie-talkies come with a voice operated transmit capability so that they will work hands-free, when used with a wearable microphone.

PORTABLE COMMUNICATION DEVICES

EXAMPLES:

1 -MOBILE PHONES2-PORTABLE DVD PLAYERS

3-PORTABLE MEDIA PLAYERS4-GLOBAL POSITIONING SYSTEMS5-SATELLITE NAVIGATION SYSTEM

6-HANDHELD COMPUTERS , INCLUDING PDAS

7-BLUETOOTH

BLUETOOTH

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecom vendor Ericsson in 1994,[2] it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

IPHONE

.Did you know that the iPhone's Home button, the button at the bottom center of the phone, has more uses than just returning you to the phone's default screen? It can also be used to control the iPhone's phone and iPod app, search, and more with just a few changed settings.In iOS 7, the home button is somewhat less powerful and flexible than in previous versions of the OS. It does basically two things.

1-First, just as in iOS 6, holding down the Home button will launch Siri (read below for more detail on that).

2-Second, double clicking the Home button will reveal all running apps in the multitasking manager, like in earlier versions.

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