Windows Live Messenger is instant messaging software that allows the user to send text messages or make VoIP calls and video calls through internet. The messenger allows the user to view and send pictures and documents through chat window, without having to send it to the other user. Computer to computer calling is free but calling from phone to computer or computer to phone is a paid service.
Windows Live Messenger (MSN Messenger)
Yahoo Messenger
Yahoo Messenger is instant messaging software which offers free service for text messaging, computer to computer calling, file transfer, chat rooms and web hosting. Computer to phone and phone to computer calling is available as a paid service. This software also prompts the user about new email arrival in the mail box or upcoming events recorded in the Yahoo calendar. It also provides offline messaging facility where the user can send message to the offline user, who would eventually receive that message once he is online.
VoIP mobile phones
Mobile VoIP allows the user to make free calls between VoIP users and cheap phone calls to any person around the world. VoIP mobile service reduces mobile bills tremendously as the user has to pay for the internet only. The user can now make voice calls or video calls from his home, office or public places. In order to connect a mobile phone to VoIP service, the mobile phone should have an access to the internet, through 3G or WiFi wireless system.
VOIP Codecs
Overview of codec
A Codec is a computer program or device, which is used to encode or/and decode the signal or digital data stream. Codecs are used in video editing, streaming video and videoconferencing. The word codec has derived from the words compressor – decompressor or coder – decoder. There are many codecs for video, audio, fax and text.
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