AL3A-RM User Guide Version B
Document Number: 451-93156-002B
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Figure 19: 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 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