In Back-to-Back operation, two DVI-100 (one in Server-Mode and one in Client-Mode) are connected
directly by IP to each other. The IP link can be a simple IP-cable, a GSM network, Microwave, Satellite
(tested with Thuraya Satellite link and the Thuraya IP Modem) or a router linking through the Internet. But
the Back-to-Back operation is
not limited to one DVI-Client
only – up to ten Clients can
be operated at the same
time, meaning that 11 TETRA
Networks can be connected
to each other at the same
time. Nevertheless, only one
(group) call is possible at the
same time.