| QoS and Internet Radio I have a Netgear WNDR3700 router and right now all my IP phones are prioritized as highest by their Mac address and this works fine.
There's an internet radio station we want to listen to that streams at 48k and in iTunes it says »radiostation.com:20631. I set 20631 as the lowest priority in the router but wanted to check if that's the only port it would be using or if there may be others. Not sure how internet radio works if it just sticks to one port etc. |
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| I don't really know anything about streaming radio, but I fired up my Wireshark packet sniffer and looked at 3 different radio stations streaming live using »tunein.com/. One was sending tcp packets to my computer's port 61023, another was sending http packets to my computer's port 61076, and the third was sending http packets to my computer's port 61165. Later I connected again to one of the above stations and now I was receiving at port 61253. My guess is they have a range of ports they use for different connections.
Wireshark is a free program. If you are concerned about it, I would install the program on your computer and look at the packet stream from the station you want to stream at different points in time. |
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 TrevIP Telephony GuruPremium
join:2009-06-29
Victoria, BC
kudos:3 | said by hwittenb:One was sending tcp packets to my computer's port 61023, another was sending http packets to my computer's port 61076, and the third was sending http packets to my computer's port 61165. Later I connected again to one of the above stations and now I was receiving at port 61253. My guess is they have a range of ports they use for different connections.
Actually it's more like your computer chooses the port.
You open a connection to (likely) port 80 on their server. They respond with a bitstream with no defined length. This is your audio stream; it's sent back to whatever port your system chose when it opened the connection to their server.
If you go to any website and capture the packets, you'll see each new connection has it's own unique port number on your side in the same range that you're observing here.
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Wondering what I do? Find out at »www.digitalcon.ca |
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 ·AT&T U-Verse
| reply to mdshs
IMO, easier than wireshark is opening a DOS prompt and entering
netstat
Do this when you listen to the radio, shut down the radio window, and then issue another netstat. You'll get the ports by "subtraction".
You may also find some ports that you never imagined were being opened by "errant" applications. |
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 TrimlinePremium
join:2004-10-24
Windermere, FL
·voip.ms
·Callcentric
 ·RoadRunner Cable
| reply to mdshs
^^^
framemainer is correct. Besides using netstat, a package by Microsoft makes viewing applications and ports a lot easier.
»technet.microsoft.com/en-us/sysi···bb897437
TCP View - I use it all the time. |
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| reply to mdshs
of course radio network must need QoS because radio transmission are live and and QoS implement and you not face any problem |
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| said by 11221299:of course radio network must need QoS because radio transmission are live and and QoS implement and you not face any problem
But it's not really live... When you consider that the client buffers this stream by several seconds (something we just can't afford to do with VoIP) streaming audio can jitter all over the place and still sound fine. |
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