FaceTime question

Discussion in 'iPhone Tips, Help and Troubleshooting' started by ccrunner_tj, Oct 24, 2011.

  1. ccrunner_tj macrumors member

    ccrunner_tj

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    Location:
    West Lafayette, IN
    #1
    Hello all. I have a question about FaceTime. I have an iPhone 4 and we recently purchased an iPad 2 for my mom. My mom thought it would be cool to be able to do a FaceTime call from her iPad to my iPhone, say, if she's in the basement and I'm upstairs in my room, and we could talk to each other if she needed something (one of those totally unnecessary but cool things ;). The problem is, we have satellite Internet which is terribly slow and has a very low download limit accompanied by a terrible latency. So, video calling from our house to an outside network is out of the question for those reasons. My question is, if we were to do FaceTime calls only on our home network, would that still use up data towards our monthly limit? I did a test call for just a few seconds, and the latency was not there; the call seemed to be in real time. So if it doesn't use up our monthly download/upload limits, then I think we should be good to go. Any thoughts?
     
  2. Thetonyk123 macrumors 68000

    Thetonyk123

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    #2
    Upgrade your internet ;) To make sure though check each time you facetime
     
  3. ccrunner_tj thread starter macrumors member

    ccrunner_tj

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    West Lafayette, IN
    #3
    Ha I wish! We've looked at every other option for Internet, even regional WISPs. That's probably what we'll do, just keep tabs on our usage. Hopefully it refreshes itself pretty quickly.
     
  4. dotme macrumors 6502a

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    Iowa
    #4
    Once the connection is established, I believe the call is device-to-device, so you shouldn't be using Internet bandwidth if you're both on the same wifi network.

    Connect a call, unplug your Internet modem, see if call keeps going...
     
  5. Applejuiced macrumors Westmere

    Applejuiced

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    #5
    FaceTime is only available on wifi, not carrier data.
    So if he unplugs the modem the call will stop and fail.
    It doesn't use up any of your wireless carrier data amount.
     
  6. ccrunner_tj thread starter macrumors member

    ccrunner_tj

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    #6
    Right, it won't use carrier data, but the download limit is on our actual home wifi service. It's 7.5 GB per month :-/

    And I tried what you suggested, dotme, and it worked! When I unplugged the modem but left the router in, the call was still in progress. So that must mean that once started, the call doesn't upload/download anything from the satellite, which would explain the absence of the latency. Sounds like it won't be an issue at all.
     
  7. Applejuiced macrumors Westmere

    Applejuiced

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    #7
    That doesn't make sense though.
    You were FaceTime on wifi and you turned off your modem and you could still continue? And it does use data while the video call is in progress. It has to both upload your stream and download the other persons video and audio at the same time.
     
  8. ccrunner_tj thread starter macrumors member

    ccrunner_tj

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    Nov 20, 2010
    Location:
    West Lafayette, IN
    #8
    Yeah, surprisingly it worked just fine. It's true that it sends data, but since the call continues to work after the modem is unplugged, the call must not send data to and from the satellite which is what counts towards our data limit. So, it must just send data back and forth through the router to the 2 devices.

    Something else is that I tried this same test (unplugging the modem) while playing Fruit Ninja between the two devices, and it resulted in the same way: the game continued without lag even after it was unplugged.
     
  9. Applejuiced macrumors Westmere

    Applejuiced

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    #9
    If you say so, that doesnt make any sense.
    The router cannot send anything to the 2 devices if you unplugged the modem and there is not internet data available.
     
  10. dotme macrumors 6502a

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    Iowa
    #10
    The OP said both devices are on the same WiFi network. Facetime is peer-to-peer, so the direct path from one device to the other never goes across the internet. It stays in the building.

    @ccrunner_tj - Glad it worked out!
     
  11. Applejuiced macrumors Westmere

    Applejuiced

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    #11
    Oh on the same wifi.
    Wouldnt it the wifi still need to have a connection to the internet though?
    And why would you want to make facetime calls when both devices are that close to eachother?
     
  12. dotme macrumors 6502a

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    #12
    Big house, I'm guessing? :)

    I'm no Facetime guru, but I think an internet connection is needed to initially establish the call (so one device can locate, identify the IP address, and connect to the other) but once the connection is made, if both devices are on the same LAN/WiFi, the conversation traffic would flow between the devices and never leave the network.
     
  13. Applejuiced macrumors Westmere

    Applejuiced

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    #13
    True, that makes sense.
    The internet connection needs to be there for the call to go to Apple's servers and routed properly.
    Then use the wifi without internet, still doesnt make much sense to do that and impractical on the same network.
    Either way since on the same wifi I dont think it will use up any of its satelite data amount so pointless to unplug the modem.
     
  14. ccrunner_tj thread starter macrumors member

    ccrunner_tj

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    West Lafayette, IN
    #14
    No real reason, just for the cool factor more than anything else. However since it appears to work with more than just FaceTime, ie a multiplayer game, there may be more useful applications of this.
     

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