20-01-2012, 03:32 PM
Mobile VoIP
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Another implementation of mobile integration uses a softswitch like gateway to bridge SIP and RTP into the mobile network's SS7 infrastructure. In this implementation, the mobile handset continues to operate as it always has (as a GSM or CDMA based device), but now it can be controlled by a SIP application server which can now provide advanced SIP based services to it. Several vendors offer this kind of capability today.
Recent developments
In the summer of 2006, a SIP (Session Initiation Protocol) stack was introduced and a VoIP client in Nokia E-series dual-mode Wi-Fi handsets (Nokia E60, Nokia E61, Nokia E70). The SIP stack and client have since been introduced in many more E and N-series dual-mode Wi-Fi handsets, most notably the Nokia N95 which has been very popular in Europe. Various services use these handsets. In spring 2008 Nokia introduced a built in VoIP client to the mass market device (Nokia 6300i) running Series 40 operating system
Software clients
MobileDialer, as they are termed, enable cell phones be turned into voip enabled devices to exploit and expose the Vo3G/Vowlan Functionalities of the phone.
MobileDialers are available for various Smartphone/PDA platforms:
