Prodys IP Family, Руководство пользователя

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Data from each connection is stored independently so that it is possible to access
data from connections other than the current one. In addition, it is possible to
delete, export or import data from any previous call.
V.6.6 More about Prodys Proprietary Protocol v3
Another set of proprietary protocols (version 3) is available. This new set of
protocols is not compatible backward. This new set of proprietary protocols
(version 3) applies
NAT Traversal techniques.
This new protocol multiplexes auxiliary data (RS232+GPI) into the audio stream,
so that it does not need an additional TCP or UDP port for it, reducing the
number of ports in the communications. In addition, this protocol has been
modified so that no configuration at all is necessary in the router at the caller
side: NAT Traversal Protocol. Only at the callee side, the router has to be
configured to allow the incoming call to proceed.
This will make it possible to make calls from anywhere, regardless of whether
there is a router which can be configured by the user or not. This is very useful
for remote broadcasting from hotels, conference rooms or any other public
location which offers a non configurable IP access to the internet, for example.
More information on this protocol can be found on chapter