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| Posted: 01 Mar 2011 12:53 PM PST SKYPE is a software application that allows users to make voice calls over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phone can be made for a fee using a debit-based user account system. Skype has also become popular for its additional features which include instant messaging, file transfer, and video conferencing. While SIP is an IETF-defined signaling protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP). The protocol can be used for creating, modifying and terminating two-party (unicast) or multiparty (multicast) sessions consisting of one or several media streams. The modification can involve changing addresses or ports, inviting more participants, and adding or deleting media streams. Other feasible application examples include video conferencing, streaming multimedia distribution, instant messaging, presence information, file transfer and online games. Which one you think has more advantage? ♥♥♥iPhone 3G, iPhone 4, Motorola Defy and Samsung Galaxy Tab♥♥♥ (At&t,T-Mobile, InTouch SmartCards and Smart Communications) Get your iSip from InTouch SmartCards
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