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Saturday, February 16, 2008

Sony Ericsson XPERIA X1

An other technological barrier crossing cell phone lauched by Sony Ericsson
The Model which about i am talking is Sony Ericsson XPERIA X1
It's general Specification includes-


2G-GSM 850/900/1800/1900

3G-HSDPA 850/1700/1900/2100

It external Technology Envelopes-Sony Ericsson XPERIA X1 has a dimension of 110 x 53 x 16.7 mm and it weights 145 gms.When talking about its display is normally comparable to any other cell phones lauched now a days and it is TFT touchscreen, 65K colors,800 x 480 pixels, 3
inches,Full QWERTY keyboard and special key which differienciate from other is
it's Optical joystick navigation.
Now you can listen to MP3 and polyphonic ringtones

Its Internal Technological view consist-

Memory Card is expandable to 2 GB and it internal memory is owesome 400 MB.

Its efficiency in Data exchange is as follows-

GPRS -Class 10 (4+1/3+2 slots), 32 - 48 kbps



3G -HSDPA, 3.6 Mbps

WLAN- Wi-Fi 802.11b/g

Bluetooth Yes, v2.0 with A2DP

Infrared port- No

USB -Yes, v2.0

Its runs on Microsoft Windows Mobile 6.0 Professional (operating system)

Now talking about talking about it s Camera and other features.

I will describe it as-

Camera- 3.2 MP, 2048x1536 pixels, autofocus, video(VGA@30fps), flash; secondary
videocall camera

Addition Features

-A GPS function-

-Java MIDP 2.0

- FM radio with RDS

-MP3/AAC/MPEG4 player

-Motion sensor (with UI auto-rotate)

-TrackID music recognition

- Picture editor/blogging

- Organiser

It is available in two shade-

1)Black 2)Steel Silver

[But Still Indian will Have to wait for this cell phone to lauched in India]

Thursday, February 14, 2008

Window Mobile Operating system


Windows Mobile is a compact operating system combined with a suite of basic applications for mobile devices based on the Microsoft Win32 API. Devices that run Windows Mobile include Pocket PCs, Smartphones, Portable Media Centers, and on-board computers for certain automobiles. It is designed to be somewhat similar to desktop versions of Windows, feature-wise and aesthetically. Additionally, third-party software development is available for Windows Mobile. Originally appearing as the Pocket PC 2000 operating system, Windows Mobile has been updated several times, with the current version being Windows Mobile 6 and a new release scheduled for 2008.
These Feature r common in Window mobileToday Screen shows the current date, owner information, upcoming appointments, e-mail messages, and tasks. Users can customize the screen by selecting what information they wish to be displayed. It also includes the notification bar, which includes icons to notify the status of Bluetooth, etc. Programs can be installed which adds extra items to the Today screen. One of these is Microsoft Money for Pocket PC. The background image can be customised directly through the Pocket PC, or themes can be created and synchronized onto the Pocket PC. The taskbar shows the current time, the volume, and the connectivity status. When a program or message box is open the blank space after the clock is filled with an OK or close icon. The main feature of the taskbar is the Start Button, which is designed similarly to the Start Button which features on desktop versions of Windows. The Start Menu features recently opened programs at the top, nine customizable menu entries, and links to the program, settings, find (search), and help. Office Mobile a suite of Mobile versions of Microsoft Office applications is included in Windows Mobile. It includes Word Mobile, Excel Mobile and PowerPoint Mobile (included since Windows Mobile 5.0). These versions include many of the features which are used in desktop versions, but some other features like inserting tables and images have not been included in pre 5.0 versions. ActiveSync has capabilities which convert desktop versions of files to Office Mobile compatible versions. Outlook mobile comes with Windows Mobile. This includes tasks, calendar, contacts, and inbox that can be sync'ed either with Outlook or direct with an Exchange Server (internet connection is required for this method). POP3 or IMAP4 access can also be used. Microsoft Outlook for desktop versions is sometimes included in a value-added CD-ROM which is included with the Pocket PC hardware manufacturer. Windows Media Player for Windows Mobile is bundled with the Windows Mobile software. Currently, all new Windows Mobile 6 Devices include Version 10.3 (Build 18123) of the player. For Older devices, Version 10 is available for download for only specified devices — these include devices from the Dell Axim range. The player supports .WMA, .WMV, .MP3, and .AVI files. Currently MPEG files are not supported, and a third-party program must be downloaded to play these, and WAV files are played in a separate player. Some versions are also capable of playing .M4A audio. Client for PPTP VPNs.

Awaiting Future Window Mobile Version

1)Windows Mobile 6.1 (2008)Windows Mobile 6.1 is a minor upgrade to the existing Windows Mobile 6 platform which brings with it a moderately retooled "carousel" interface [26], and several software improvements such as threaded SMS.
2)Photon (2009)Microsoft is currently working on an upgrade to the Windows Mobile platform codenamed Photon that will be powered by Windows Embedded CE 6.0. Reputedly, Photon would merge both Smartphone and Pocket PC versions in one Windows Mobile version, with the new interface being optimized for both direct touch and button-based interaction, reducing stylus use. Microsoft Photon has been in development since the release of Windows Mobile 5 and was originally scheduled for release in the first half of 2008, but has now been delayed to 2009 according to leaked Microsoft documents.

VoIP--Voice over Internet Protocol

An overview of how VoIP works

A typical analog telephone adapter for connecting an ordinary phone to a VoIP networkVoice over Internet Protocol (VoIP) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it). VoIP is also known as IP Telephony, Internet telephony, Broadband telephony, Broadband Phone and Voice over Broadband. "VoIP" is pronounced voyp.
Companies providing VoIP service are commonly referred to as providers, and protocols which are used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol (1973) invented for the ARPANET providers. Some cost savings are due to utilizing a single network to carry voice and data, especially where users have existing underutilized network capacity that can carry VoIP at no additional cost. VoIP to VoIP phone calls are sometimes free, while VoIP to public switched telephone networks, PSTN, may have a cost that is borne by the VoIP user.
Voice over IP protocols carry telephony signals as digital audio, typically reduced in data rate using speech data compression techniques, encapsulated in a data packet stream over IP.
There are two types of PSTN to VoIP services:

1) Direct Inward Dialing (DID) and access numbers.

2) DID will connect the caller directly to the VoIP user while access numbers require the caller to input the extension number of the VoIP user.


Voice over Internet Protocol has been a subject of interest almost since the first computer network. By 1973, voice was being transmitted over the early Internet.[1] The technology for transmitting voice conversations over the internet has been available to end-users since at least the 1990's. In 1996, a shrink-wrapped software product called Vocaltec Internet Phone Release 4 provided VoIP, along with extra features such as voice mail and caller id. However, it did not offer a gateway to the analog POTS, so it was only possible to speak to other Vocaltec Internet Phone users.[2] In 1997, Level 3 began development of its first softswitch (a term they invented in 1998); softswitches were designed to replace a traditional hardware switchboards by serving as the gateway between two telephone networks
Security ModeMany consumer VoIP solutions do not support encryption yet, although having a secure phone is much easier to implement with VoIP than traditional phone lines. As a result, it is relatively easy to eavesdrop on VoIP calls and even change their content.[9] There are several open source solutions that facilitate sniffing of VoIP conversations. A modicum of security is afforded due to patented audio codecs that are not easily available for open source applications, however such security through obscurity has not proven effective in the long run in other fields. Some vendors also use compression to make eavesdropping more difficult. However, real security requires encryption and cryptographic authentication which are not widely available at a consumer level. The existing secure standard SRTP and the new ZRTP protocol is available on Analog Telephone Adapters(ATAs) as well as various softphones. It is possible to use IPsec to secure P2P VoIP by using opportunistic encryption. Skype does not use SRTP, but uses encryption which is transparent to the Skype provider.
Inshort Voice VPN solution provides secure voice for enterprise VoIP networks by applying IPSec encryption to the digitized voice stream.