A3LA-R-MIL-MOD User Guide Version B
Document Number: 451-93156-001A
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Figure 17: Iridium Network Data Capabilities
G.2 D
IAL
-
UP
D
ATA
S
ERVICE
Dial-up data service provides connectivity through the Iridium satellite network to another
Iridium modem, to the public switched telephone network (PSTN), to the Defense Switch
Network (DSN), to a remote Local Area Network (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.
Many desktop and laptop computers are equipped with either an internal or external modem
to perform dial-up data applications across the landline telephone network (PSTN). On these
computers, terminal emulator software or a dial-up networking connection can be configured
