Video 100% Audio 0%

Question

I've an interesting problem. I can do audio chat with no problem at all. When I try a video chat I get pictures at both ends but no audio. Looking at the Connection Doctor shows a 0% Audio quality.
Both ends have 2Mbps DSL with 384 Kbps upload speed. There is no bandwidth limit in iChat and QT prefs are set to 1Mbps Cable.
One end is going through a D-Link DSL-G604T wireless router the other through a Sun box running ipfilter. On the D-Link upnp is enabled to get the AV to work. The Sun box has port forwarding to direct the appropriate ports directly to the iChat Mac. All of the ports listed in the Apple documentation are forwarded.
As we have audio only chats working I'm assuming that the audio config is correct. Anyone have any idea where I should start to look?

Answer 1

Hi Michael,
That is an unusual one.
TO AV chat, iChat needs:
5678 to allow invites in both directions
5060 to allow the sorting of which 4 ports will be used from
16384-16403 (any 4 ports in any 1-1 chat)
In a Video chat the ports are 1 up for Video, 1 down for video and repeated for Audio.
IN Audio chat all 4 ports are supposed to be Audio
Unless the D-Link has got some starnge implementation of UPnP that should be OK.
That makes me think the Sun box end might have outgoing filters or not have all the group of 20 ports open.
Can you get the Test accounts ? (appeu3test01, appleu3test02 and appleu3test03 or ichatavtesting)
This may not tell you much more as you will not be able to see what they are recieving.
Ralph