Specifications

Digi m10 Hardware Reference v 1.20
Digi International, Inc. © 2009
Page 26 of 36
 Diagnostic Port: The Digi m10’s diagnostics can be accessed through this port using a terminal
emulation program. the interface is at RS-232 levels. Amber LEDs next to this port indicate that it is
active.
 Host Port (RS232): Users can send ORBCOMM serial commands to the Digi m10 at RS-232 levels using
this port. Amber LEDs next to this port indicate that it is active.
 Host Port (TTL): Users can send ORBCOMM serial commands to the Digi m10 at TTL levels using this
port.
 USB Port: Users can send ORBCOMM serial commands to the Digi m10 using this port.
 Signal Rail (TTL): This is a pin- to-pin mapping of the Digi m10 interface connector.
 Data Available: This blue LED illuminates when the Digi m10 receives messages, user commands, or
Global Grams from the satellite. It will also be asserted and de-asserted once after power on, when the
Digi m10 is ready to accept commands. Refer to Section
2.5 for further details.
 Satellite Available: This green LED illuminates when the Digi m10 is receiving valid downlink signals.
Refer to Section
2.6 for further details.
Only one of the Host port serial interfaces on the development board should be connected at a time.