117-00020 Rev 4.0 Effective Date: 28 October 2022
Page 7 of 12
Section 5:
Installing the Flightcell Iridium modem
Mounting the modem
The modem should ideally be located close to the DZMx (if installed with DZMx), preferably where
it is reasonably readily accessible to enable easy access to the SIM card.
Appendix 2 includes drawing references for a dimensioned drawing of the modem, showing
mounting details.
Wiring the modem
The data and audio connections should be made as per the wiring diagrams referenced in
Appendix 1.
Modem pin Function
1
DC in
Power
2
Audio from Sat Lo
Output
3
Audio to Sat Lo
Input
4
Ground
GND
5
RS-232 RTS
Input
6
RS-232 CTS
Output
7
Not used
-
8
Not used
-
9
Ground
Ground
10
Audio from Sat HI
Output
11
Audio to Sat HI
Input
12
Not used
-
13
RS-232 RXD
Input
14
RS-232 TXD
Output
15
Ring indicator
Output
