...within SIP, native bridging has two subcategories. One, typically referred
to as "SIP native bridging" is used when reINVITEs are enabled. The
endpoints
send their media directly to one another. The other subcategory is called
"Packet 2 Packet" or "P2P" bridging. If reINVITEs are not
enabled, but there
are also no features that require the Asterisk core to be in the voice path,
then the bridging will be done at the RTP layer of Asterisk.
[1] http://www.voip-info.org/wiki/view/Asterisk+G.729+pass-thru
[2] http://lists.digium.com/pipermail/asterisk-dev/2010-March/043053.html
Regards,
Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer
