AEQ
TALENT
20
4.2. Connection modes.
In order to establish an IP communication, first we need to choose one of the three available
connection modes: "PROXY SIP", "DIRECT SIP" and "RTP Point to Point (RAW)".
We can access the IP configuration submenu by clicking on "I/F Setup". This menu is described
in sections 6.1.4.2 and 6.1.4.3 of "AEQ ControlPHOENIX" user’s manual.
It is important to know the details of each type of connection, so they are explained below.
4.2.1. RTP Point to Point (RAW).
This type of connection is selected when the connection over IP uses the RTP protocol only.
Calls are sent by specifying the destination’s IP address:port, which must be known at both
sides. Obviously there is no advanced signaling protocol in this scenario and you will need to
agree on audio coding algorithms at both ends and manually establish the communication in
both directions.
In order to avoid that hassle (making the call from both ends, hanging up separately and
agreeing on the encoding algorithm) "
Smart
RTP
" can be activated in both involved audiocodecs
(provided that they are AEQ Phoenix units compatible with this mode). This way, the call can be
established from one end only (and thus, we only need to know the IP address and ports of one
of the communication ends).
When calling in RTP mode, the destination identifier must look like this:
<IP_address>:<destination port>
, for example: "
172.26.33.28:5008
"
The specified destination port must match the Local port set up for the remote equipment. That
is, in order to make a RTP call, we must know the IP address and local port of the remote unit
even if "
Smart
RTP
" is used.
However, if the destination unit is behind a router (NAT), then a port-forward rule needs to be
applied on the router to re-direct the public destination specified in the destination identifier
towards a certain internal IP address (the destination codec’s local IP address) and port. The
internal port doesn’t need to be the same as the external or public port, but it usually is)
When you create a Call Book, these fields describing a contact can be
modified in the Call Book that can be accessed from a codec individual
control window through the "Contacts" option in "Configuration" (see
section 5.1.7 of "AEQ ControlPHOENIX" user’s manual).
You can access the IP configuration submenu for RTP
mode (especially in order to set the “local port”, where
the codec channel expects the audio to be received at)
by clicking on "
I/F Setup
" button, and that it is explained
in section 6.1.4.3 of "AEQ ControlPHOENIX" user’s
manual.
