SHOUT nano 100 User Guide Version A
Document Number: 451-22013-001A
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modem actually dials and initiates a connection with the Iridium gateway through the Iridium
satellite constellation. Because the Iridium modem is requesting to establish a data connection,
the switch at the gateway routes the call through another modem. The modem at the Iridium
gateway then dials into and connects to another modem at the other end. Figure 12 illustrates
how an Iridium dial-up data service call is routed. The handshaking and protocols established
between the modems are independent of the Iridium network.
For those ISU-to-ISU dial-up calls where data transmission delay is critical, such as the
application of TCP/IP protocol, DAV should be considered in the design. This option eliminates
the Iridium gateway once authentication and registration is completed, allowing ISU-to-ISU
communication without the gateway in the loop.
Figure 12: Iridium Dial-Up Data Service
C.1.2:
D
IRECT
I
NTERNET
C
ONNECTION
The Iridium Direct Internet service allows users to connect to the internet via the Iridium
gateway without having to sign up with an internet service provider. This service utilizes a
dedicated Apollo Server at the Iridium gateway, which provides high-speed connectivity to the
