Re: [PLUG] Vonage Ports

[gyoza@comcast.net]

After looking at traffic with Ethereal, I can see that the ATA 
communicates regularly with Vonage while idle using ports 10,000 udp and 
5061 udp (sip-tls).  And nmap shows that port 10,000 tcp on the ATA is 
wide open.  (Why is the open port tcp when Vonage is using udp?)

When I made a call, ports 10054 and 12260 were used for the actual voice 
communication.  A second test call used ports 10058 and 12630.  At the 
same time, ports one number higher are also being used, so a total of 
four ports in the 10002 to 19999 range are being used during a call.  
(RTP uses even numbered ports, RTCP uses the next higher odd numbered 
ports.)

From what I understand SDP (session description protocol) decides which 
ports will be used for calls.

Conclusion: What the heck is this mess?!  haha
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