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Re: [Linphone-users] Windows 8 (no audio; no rtp packets received)

From: alkim1234
Subject: Re: [Linphone-users] Windows 8 (no audio; no rtp packets received)
Date: Wed, 19 Dec 2012 19:40:20 +0000
User-agent: Mutt/1.5.21 (2010-09-15)


> I think you are having some trouble with Windows 8 here, not with Linphone.
> Everything is correct in the logs.

Yes, that's kind of what I think too. I heard that Windows 8 prefers ipv6 to
ipv4, so I disabled ipv6, but that didn't change anything. I'll take a look at
the firewall and report back after fiddling with it a little.

However, a couple things are a little strange. First, charmander (my friend on
Windows 8) has reported that he is able to communicate with sip:address@hidden
using linphone with no problems. It is only when he communicates with me (also
on linphone) that things stop working. Also, charmander has tried using Yate
(another SIP/VOIP application) on Windows 8, and that works just fine as well.
>From a cursory glance over yate's sources it seems they haven't changed 
specifically for Windows 8, but I could be mistaken. These two indicators
suggest that it isn't just Windows 8 that is misbehaving.

> What can be seen is that both sides send their RTP packet stream correctly
> but receive nothing:

I agree with this diagnosis. It should be noted while the RTP packets aren't
reaching their destination, all SIP packets are delivered just fine.

> I suggest that you check your firewall configuration. Hint: the port used
> for audio RTP stream is UDP 7078.

I will report back once I've tried this.

> Or the problem may come from the configuration of your NAT. Unwanted port
> forwarding maybe?

I don't think the NAT has been touched from when it was working, so this
shouldn't be it.

Thanks for responding.

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