Wi-Fi Phones – The Future of Mobile Phone Technology
The Wi-Fi phones are wireless phones that connect to Wi-Fi hotspots to communicate. Wi-Fi is a technology to transmit data at high speed wirelessly. The Wi-Fi phones use the same technology used in VoIP (Voice over Internet Protocol). VoIP is a technology that allows users to make free long distance calls, but there is a limitation that the appeal must come from a computer. These new Wi-Fi phones can use VoIP to call without being connected to a computer. They use the same technology to wireless network using computers. The Wi-Fi phones can use a computer, another cell phone, landline or IP address.
The Wi-Fi phones are a part of Smartphone. Smartphone’s are hand held phones that have features such as PC. Smartphone usually come with GPS, e-mail capabilities and electronic books. The Smartphone also have options to install and external application to meet your growing needs. Here is a summary of the features that a Smartphone is capable of performing:
1. Send and receive phone calls.
2. Management of personal information such as contacts and appointments.
3. Connect and communicate with other devices like a PC, laptop or Smartphone it.
4. E-mail and instant messaging.
5. Office applications like Word or PDF.
6. Capture and play back audio and video files in standard formats.
Smartphone have a high processing speed in the range from 200 to 700 MHz; the Smartphone uses the ARM processor. These processors are highly energy efficient and are used in printers, mp3 players and other small appliances. They have a built in memory plus an expansion slot for additional storage. The software Smartphone can be viewed in layers as follows:
1. Kernel: This is the heart of the software; it manages all software development processes and drivers.
2. Middleware: It consists of all the software libraries and APIs necessary for running applications.
3. The user interface layout: The GUI and the model are present here.
4. Applications: Here’s where applications are stored and ready to be executed.
Each phone has an operating system (OS). The operating system of a Smartphone control functions and allows the interaction of hardware with software. A Wi-Fi phone initially connects to Wi-Fi hotspot based on the connection to verify the VoIP capabilities and places a VoIP call on user request. Just as a PC, data packets are exchanged between the router and the phone during a phone call. From a material standpoint, cordless phones transmit signals at a different frequency. The phones generally transmit at 850 MHz while the cordless phones use Wi-Fi 802.11b or 802.11g, which transmit signals to 2.5 GHz. In a Wi-Fi phone, as the number is entered it is converted into packets and sent to the wireless receiver. The wireless receiver sends the call to the Internet like any other VoIP call. When the conversation is initiated voice is transmitted in packets. Some Wi-Fi phones use a Session Initiation Protocol (SIP) protocol. Calls can be obtained by introducing only the desired SIP address. SIP is a standard protocol for handling voice data. Currently, Wi-Fi phones do not have much potential routers because of the lack of Wi-Fi throughout the country. It is not necessary that all those who have a Wi-Fi phone offers wireless connectivity to receive calls. Some Wi-Fi phones come with a GSM feature where the user can receive calls with or without Wi-Fi. VoIP uses lots of bandwidth, if the router is too crowded, and quality loss will occur, these problems prevent the growth of current Wi-Fi phones.
Tags: high speed wireless, Smartphone, Wi-Fi hotspot, Wi-Fi phones, wireless receiver