<br><br><div><span class="gmail_quote">2008/3/21, Darrick Hartman (lists) <<a href="mailto:dhartman@djhsolutions.com">dhartman@djhsolutions.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br> <br> John Faubion wrote:<br> >> are plenty of phones on the market which do SIP now - most<br> >> modern Nokias do. I use an E90 Communicator, but the E95 is<br> >> popular too, so I'm experimenting with using my mobile as my<br>
>> "one" phone, via Wi-Fi/SIP when I'm in the home/office and<br> ><br> > Out of curiosity, how do these phones handle the transition from Wi-Fi to<br> > GSM? Is it seamless? Can the transition occur when on a call?<br>
<br> <br>Not seamless unless the cell phone provider offers such a service.</blockquote><div><br>If you're on call using GSM band, it is seamless.<br><br>If you're on call using SIP/WiFi, it's up to SIP server to dial a new call to your mobile number and blind transfert previous call to it.<br>
Maybe some dual band phones are able to automatically accept some incoming GSM calls, put them in 3-way conference (of some kind) and wait for SIP server to end WiFi call without asking anything to user.<br>Parts of this puzzle are here but integration should be rather hard.<br>
</div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> You<br> won't find that available in the US. So even though it's one phone,<br>
you'd have 2 numbers. Cell phone providers have no incentive to offer<br> such a hand-off because they wouldn't make any money on the calls after<br> they are handed over to the voip system.<br> <br> Darrick<br>
<br>--<br> Darrick Hartman<br> DJH Solutions, LLC<br> <a href="http://www.djhsolutions.com">http://www.djhsolutions.com</a><br> <a href="http://www.djhsolutions.com/wiki">http://www.djhsolutions.com/wiki</a><br> <br><br>
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