AEQ
TALENT
27
Channel transmission active
Channel transmission disabled
NOTE 2:
Advanced contacts (those allowing specification of the communication mode, coding
algorithm/profile, replicas, etc.) can only be stored in the General call book, which is saved in a
database in the control PC. These contacts can however be copied to the different devices, but
the advanced fields (interface, coding algorithm, SIP account / provider and replicas) will be
lost, so only the contact name and contact data (main IP:port or destination URI) will be stored.
NOTE 3:
It is possible to use multiple-unicast transmission with "
Smart
RTP
" active. The
transmitter unit must be the one that generates the calls, and when it hangs up, it will send
notifications to the MAIN destination only (not in the replicas). As a consequence, only this one
will hang-up. If the user needs that all receivers hang-up too, the "Auto Hang-Up" option can be
activated on them defining a reasonable time (let’s say, 5-10 seconds). If, on the other hand, we
need to cut the call from a receiver, only that with transmission enabled will make the others
hang-up (even if it is not the main receiver).
Please read the application notes published by AEQ regarding IP connectivity for more
information on IP communications in particular scenarios.
4.3. NAT TRAVERSAL.
NAT Traversal is a set of tools used by the equipment in order to overcome the issues caused
by NAT (Network Address Translation), typically performed by routers. We can select among
several modes depending on the kind of network the units are connected to.
TALENT offers a total of six different operating modes when traversing devices with NAT
(routers, firewalls…). Each one of those modes is suitable for a different scenario. For instance,
when the units that are establishing communication are in the same local network, the internal
working way will be different than when it’s done through the Internet.
Four of the six modes are automatic (AUTO 1 - AUTO 4), another one is manual (MANUAL -
router configuration) and the last one (OFF - there is no NAT) is used when no devices with
NAT are crossed (the unit is in a local network or connected to the Internet with a single
workstation router). In automatic modes the unit tries to find out its public IP and ports without
the user help, while in manual mode the unit gets those data directly from user (and user gets it
from network administrator).
Due to the technical complexity inherent in most of the parameters involved in this NAT
TRAVERSAL menu and the importance that any modification has in the final operation of the
unit, we recommend that only highly qualified personnel in possession of all the technical
documentation and manuals work on this NAT configuration menu. For additional information,
see
APPENDIX B5.
The NAT traversal options of a codec are accessed by following this sequence from the
involved individual codec control window: "Configuration"
"General"
"I/F Setup"
"NAT
Traversal".
Next we will describe the operation without NAT and the other five modes supported by
TALENT.
