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nmap
2010 Feb 11
2
SIP RTP ports not released when channel is hung up
...only old ones.
My rtp.conf has
[general]
rtpstart=30000
rtpend=30100
so 100 ports available. I know that up to 4 ports per channel can be used
and so up to 25 channels are possible.
But even earlier I often get the error about "No RTP ports remaining".
I had a look at
netstat -nuap
and it shows that a lot of ports are still assigned, even if there is no
channel in use.
But "sip show channels" show a lot of (unused) entries with no
codec/Format and "Last Message" like INVITE, REGISTER, OPTIONS.
Why aren't RTP ports released when not in use?
Or is ther...