SHOUT nano 100 User Guide Version A
Document Number: 451-22013-001A
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Figure 11: Iridium Network Data Capabilities
C.1.1:
D
IAL
-U
P
D
ATA
S
ERVICE
Dial-up data service provides connectivity through the Iridium satellite network to another
Iridium modem, to the PSTN, to the Defense Switch Network (DSN), to a remote LAN (e.g., a
corporate network), or to an internet service provider (ISP) at a nominal data rate of 2.4 kilobits
per second (kbps). The connection time involving user authentication and handshaking (or
modem training) can range from 15 to 30 seconds. For an Iridium-to-Iridium call, dial-up data
service offers an additional option known as Data After Voice (DAV). Similar to a voice call, a DAV
call is routed directly from one Iridium modem to another Iridium modem without going through
the gateway.
The Iridium dial-up data service, as shown in Figure 12, functions in much the same way as
the PSTN dial-up connectivity. From the perspective of a computer, the Iridium modem is just
another external modem. The only difference is that the dialed telephone number must conform
to the international dialing pattern used by Iridium. When a data call is placed, the Iridium
