Dtr Settings; On/Off Control Input - Iridium EDGE User Manual

3.2.3

DTR Settings

The SBD's DTR setting can be set by AT commands. For Iridium Edge units, the internal SBD's DTR
setting has been updated and saved to flash although the SBD's internal DTR signal is grounded
internally on the Iridium Edge and comes out externally on the Iridium Edge connector. In the event the
SBD's factory default configuration is reloaded, the default DTR setting will be re-enabled. To restore the
SDB's DTR setting to the Iridium Edge's shipped defaults, issue the AT&D0 and AT&W0 as per the table
below.
Table 3-11 Internal SBD DTR Settings
Parameter Value
Disable Flow Control No Flow Control (AT&D0)
Save Configuration in Non-volatile AT&W0
SBD Factory Flow Control Default
Flow Control (&D2)
( Do not use this setting)

3.3 On/Off Control Input

The Iridium Edge can be powered down using its On/Off input. When the Iridium Edge is powered down,
its internal SBD modem is turned off and the Iridium Edge cannot send or receive satellite messages. As
well, the RS232 drivers are not powered, which disables the AT interface communications with a Host
Controller.
The On/Off control line inputs are described in the table below. If the On/Off input is left floating, or if it is
high, the Iridium Edge is powered on. When the On/Off control input is grounded or a negative voltage,
the Iridium Edge is powered off.
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