USB is a standard for a wired connection between two
electronic devices, including a mobile phone and a desktop
computer. A cable that has a connector at either end makes
the connection. One end, the one that plugs into the computer,
is the same across all USB cables while the one that plugs
into the mobile device can be of various types such as miniUSB,
microUSB or a proprietary connector. Most of the mobile
phones come with USB ports. USB 2.0 provides a data rate
of 480 Mbps. It can be used for sending photos, sending
music files, videos etc from devices like laptops, PDAs,
PCs, Digital cameras to cell phone and vice versa.
Transferring data may require drivers to be installed
on the desktop computer or laptop but some phones offer
"mass storage" mode which means they appear as thumb drives
to the computer and no special drivers are needed.
In addition to their data transferring application, USB
cable also carry an electric charge that can be used to
charge the mobile phones by connecting it to a PC or a laptop.
Now a days most of the mobile phones come with a USB
cable as an additional accessory along with the CD having
drivers to be installed on PC or laptop in order to use
USB for data transfer.
4.5.b HDMI (High Definition
Multimedia Interface)
It is an interface used to transmit uncompressed audio
and video digital data. It is commonly used in High Definition
TVs. Currently HDMI support 720p, 1080i, and 1080p with
eight-channel audio support. HDMI can transmit at a speed
of 5 GBPS and HDMI cable have 19 wires and it looks similar
to USB cable but with more thickness.
In mobile phones HDMI ports are common for connecting it
to your Television sets. There is Type A & Type B HDMI cables,
Type B have 29 wires. HDMI can deliver the best image quality
of any of the cable types available today. It can handle high-definition
video of up to 1080p resolution at 60 frames per second, which
is the most bandwidth-intensive video format currently available.
Typically the maximum length for a "standard" HDMI
cable is about 15 meters.
4.6. Interfaces-wireless
4.6.a Wi-Fi
A mobile phone which is Wi-Fi enabled can access Internet
through a nearby router which is wired to the web. A Wi-Fi enabled
mobile can connect to wireless router at your home, office or
any other place where an active wireless router is available.
These places are usually called as hotspots. Some hotspots are
free and some costs you money. To establish a connection between
a Wi-Fi enabled mobile and wireless router login credentials
are required.Wi-Fi is a global standard which means a Wi-Fi
enabled mobile will work anywhere in the world unlike other
technologies such as GSM and CDMA. Wi-Fi requires high power
consumption when used with mobile devices. Also, Wi-Fi networks
have a limited range. A traditional wireless router using the
802.11b or 802.11g standard with a regular antenna can work
within a range of 120 feet indoors to 300 feet outdoors.
4.6.b Bluetooth
Bluetooth is a wireless technology that allows mobile phones
to connect to other Bluetooth enabled devices like phones, laptops,
PCs, PDAs, printers over short distances (up to100 meters).
Bluetooth uses radio waves (in the 2.4 Gigahertz range), and
is designed to be a secure and inexpensive way of connecting
and exchanging information between devices without wires. Using
Bluetooth on mobile phones for transferring data does not cost
you any money. Bluetooth also have a quality to read out the
memory card and trace the other memory card. Wi-Fi networks
and wireless hotspots are almost 20 times faster then Bluetooth.
Latest version of Bluetooth available is Version 4.0 Uses of
Bluetooth include: sending photos from your mobile, exchanging
business cards, sending voice from a headset to a mobile phone,
and real-time satellite navigation using GPS.Logo for Bluetooth
is
4.6.c Infrared
Infrared is another feature present in mobile phones and
is used for wireless transfer of data from mobile phone to other
infrared enabled device and vice versa. The infrared technology
works through the straight-line connectivity, which works by
in sight feature. It means mobile phone should be must pointed
towards the other device you wish to connect without any obstacles.
For safety reasons, infrared isn't activated by default on
most phones so to use this feature you need to activate infrared,
also known as "IrDA" by going to settings of your mobile phone.
