5 Replies Latest reply: Apr 7, 2012 12:16 PM by Ralph Johns (UK)
SdeS Level 1 Level 1 (0 points)

Just a question, and a warning if anyone out there in the UK is contemplating BT (British Telecom) broadband, you might get this issue.

 

I can share a screen with someone on BT braodband, but using voice at the same time makes the video very slow and jumpy.  So, my solution used to be to phone on a normal phone line and just use the iChat for screen sharing. 

 

Now, my mother has switched to BT broadband + BT phone (was Metronet broadband + BT phone), now, every time I start a voice call at the same time as screen sharing it crashes the iChat app.

 

BT tell me it is porbably a fault with the applicaiton, and the fact that it worked for over 3 years whilst on Metronet is pure coincidence.  The whole reson she switched to them was to try to save a little money, they want to charge £50/hr to diagnose what the issue might be.

 

Does anyone else have this problem?  If so, has anyone discovered the cause?

 

Thanks

 

Stephen


Mac OS X (10.7.3), slide rule, abacus, protractor, dividers.
  • Ralph Johns (UK) Level 9 Level 9 (70,005 points)

    HI,

     

    Describe in more detail please what you mean by "Crash"

     

    Can you Video Chat ?

    Can You Audio Only chat ?

     

    These both use the same ports when making a connection and during the actual Chat

     

    A Screen Share is  an Audio Chat+ and uses  a random port for the Screen Sharing side.

    As this port is random you cannot set up Port Forwarding or Port triggering (If the router part does that) and you need to use UPnP (Universal Plug and Play).

     

    UPnP is normally On by default in the later Home Hubs (2 and 3)

     


    Early versions

    If she happens to be using iChat 3 or earlier though there can be issues as the Hub is capable of VoIP and using the phone over the Internet.

     

    VoIP uses a protocol over the internet called SIP (Session Initiation Protocol)

    This has internationally agreed ports  of 5060-5063 (it uses one and will try one at time if not available)

     

    Early version of iChat  also used port 5060 to make connections.

    However some ISPs started to Block these ports and then charge extra for this "extra" service (sometimes without notification)

    Some Modems that can "route' the Phone over the internet also need to have setting changed to allow iChat to work,  (Basically the device has a SIP filter regardless of the addresses on the data packages meaning they don't get to the computer and get "lost" as they are not addressed to the Phone either).

     

    Later versions of iChat moved away from the 5060 port(s) and used 16402 as the first choice.

    Skype that also uses SIP to make connection have never used the 5060 range.

     

    If there is  a error message about Unexpectedly Quit we could do with seeing the "Crash Log" from her Home Folder/Library/Logs/CrashReporter/iChat.

     

     

     

     

     


    11:15 PM      Friday; April 6, 2012


    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

     

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     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),

    "Limit the Logs to the Bits above Binary Images."  No, Seriously

  • Defcom(UK) Level 6 Level 6 (15,345 points)

    If you have Micro-fliter in your BT phone socket i would try another one if you can.

     

    Looks like this.

     

    BT ADSL MICRO FILTER MF50 only - £1.99 at Telephones Online - With Answer Machine - BT_ADSL_MICRO_FIL_N.jpg

  • Ralph Johns (UK) Level 9 Level 9 (70,005 points)

    Ahh !!!

     

    now, every time I start a voice call at the same time as screen sharing it crashes the iChat app.

     

     

    I had not equated that with starting a telephone call whilst using iChat Screen Sharing.

     

    I was thinking more along the lines of starting Screen Sharing when doing video and wanting to go back to Video or in fact trying to Audio chat to someone else.

     

     


    7:47 PM      Saturday; April 7, 2012


    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

     

      iMac 2.5Ghz 5i 2011 (Lion 10.7.3)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),

    "Limit the Logs to the Bits above Binary Images."  No, Seriously

  • Defcom(UK) Level 6 Level 6 (15,345 points)

    I might have misread the post.

  • Ralph Johns (UK) Level 9 Level 9 (70,005 points)

    Nope,

     

    On second look I think the Micro Filter is the most likely.  (Although It is long time since I had one fail)

     

    It would be strange that failure at the Posters end coincides with the change in router at the other but life is like that sometimes.

     

    EDIT.
    Of coures the dodgy Micro Filter does not have to be on the Socket the Modem or the phone are one (if they are different).

    My main phone is on the same socket as the modem but I have another socket near my computer (Ony the G4 can use it) and sockets in the bedrooms as well.


    8:14 PM      Saturday; April 7, 2012


    Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

     

      iMac 2.5Ghz 5i 2011 (Lion 10.7.3)
     G4/1GhzDual MDD (Leopard 10.5.8)
     MacBookPro 2Gb (Snow Leopard 10.6.8)
     Mac OS X (10.6.8),

    "Limit the Logs to the Bits above Binary Images."  No, Seriously

     

    Message was added to by: Ralph Johns (UK)