John, Microwaves will disrupt WiFi signals as it uses the same frequency as the 2.4 Ghz b/g/n varieties. The 5 Ghz varieties should not be disrupted. I have heard people say why don't they change the frequency of the microwave oven to not interfere but they don't realize that the frequency of the microwave oven is defined by physics where the frequency of WiFi is a preference. Additionally, microwave ovens put out a LOT more power than WiFi access points... WiFi typically runs at 100 mw and generally maxes out at 400 mw while microwave ovens run at ~1000 Watts... a 10,000x increase in power over 100 mw WiFi.
Back on to subject, I still think you could monitor something on your network like DHCP or DNS or something that would tell you when the phone is on the network and when it isn't. I did a quick check and smartphones almost always "phone home" (via TCP/IP query) and this is a pretty regular occurance. This means that you could monitor this traffic and when it has not appeared for N minutes (N=~5-10 minutes) just switch to "phone not on premises" mode. This would have the added advantage that if the person left the phone at home or in the car or lost it, the system would not route calls to it. However, if the accidentally leave it at work, they will stay routed to it, but does that really matter since the phone is at the office anyway. One disadvantage is that anytime they got a new phone you would have to update the configuration to watch for the new phone rather than the old one. A quick Google search shows that android devices query " android.googleapis.com" approximately every 5 minutes and that iOS devices query apple.com at about the same interval. Even if the wifi goes to sleep and is then woken up every 5 minutes (or every 2.5 minutes if these two queries are 90 degrees out of sync) they would retain their IP address as the DHCP lease will not have expired and, even if it has, you will have set them to a static IP configured by DHCP anyway. Andy F On Tue, Mar 31, 2015 at 8:55 PM, John F. Eldredge <[email protected]> wrote: > The reason I suggested having the connection to the work WiFi turn the > at-work state on, but putting the phone into car mode turn the state off, > is so momentarily losing your WiFi connection won't turn the at-work state > off. I know from using my home WiFi that you will occasionally lose the > connection for a moment, probably due to some outside signal momentarily > jamming the signal. The same frequency range used for WiFi is also used by > microwave ovens and (if I recall correctly) walkie-talkies. > > > On March 31, 2015 5:44:40 PM CDT, Blake Dunlap <[email protected]> wrote: > > Locale/tasker/llama + location based on wifi ssid in the office + > > scripting/api can do this pretty easily. > > > > That said, this is the whole point of integrating im and presence so > > you don't have to jump through a bunch of hoops, it just works with a > > presence client like jabber on the phone. > > > > -Blake > > -- > John F. Eldredge -- [email protected] > "Darkness cannot drive out darkness; only light can do that. Hate cannot > drive out hate; only love can do that." -- Martin Luther King, Jr. > > -- > -- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nlug-talk?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
