On 02/15/2011 11:20 AM, Jared Smith wrote: > On Tue, Feb 15, 2011 at 12:27 PM, Jeff Moyes > <[email protected]> wrote: >> I've heard that with smart phones, if you are in a wifi zone that you >> can connect to, you can reroute your calls over the wifi (using voip) >> and not use the cell radio (and therefore not use up cell minutes). > > That's correct. I've been doing it for five or six years now.
I think that only T-Mobile has phones that can tunnel GSM over 802.11. And they are not necessarily even smart phones. If you're referring to SIP, I also use it. Well I have used Google Voice and gizmo on my phone for quite a while. > Support obviously varies from smartphone to smartphone. Many of the > newer Nokia smartphones (most of the E and N series) have a SIP client > built into the OS, which makes it much better on the battery life, as > the OS handles the wakeups appropriately. Things seem to work OK for > me on my Android devices, but VoIP calls really tend to chew through > the battery pretty quickly. My Nokia E65 chews up the battery when any 802.11 is on. Even without taking calls, I get maybe 40 minutes. The 802.11 radio really sucks the juice (probably because it's very chatty compared to the cell radio). iPhones have a bigger battery, but 802.11 still cuts into battery life. >> In addition to any help from the list, does anybody know any good >> resources that talk about this (hopefully without tons of telecomm >> jargon or else explanations of the jargon as you go)? > > Not off the top of my head -- but feel free to ask on the list here, > and I'll try to respond. We used to have a Asterisk users group in Utah, but from the google group, it's been dead a long time, sadly. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
