Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 124
The email's subject must be the IMEI of the Iridium modem. The IMEI may be seen by
pressing the Radio Diags window of LinkComm’s Telemtry tab. Each transmission made by
Satlink over Iridium will be stamped with its unique IMEI.
The email needs an attachment containing the command(s) to be sent. The attachment is a
simple text file and it must have the .sbd extension. Example file names: Status.sbd,
MultiCmd.sbd
The body of the email should be blank. Do not put commands for Satlink into the body of the
email.
The attachment may not be larger than 270 bytes.
Each command may be replied with no more than two messages, for a total of 680 bytes.
The first byte of this file must be an ! in order for Satlink to send a reply. E.g.
!STATUS
Multiple commands may be sent in a single message. Commands can be separated with a
new line or a semicolon ; E.g.
!LAST; !STATUS;
12.2.
Cellular Telemetry
Satlink may be equipped with a cellular modem. The cell modem provides Satlink with internet
connectivity and the ability to send and receive SMS (text messages).
Depending on the modem and the network service, Satlink can
Deliver sensor data on a regular schedule, much like the environmental satellite radio.
Deliver timely alarm notifications.
Send data via SMS (text messages) and via TCP/IP (internet).
Allow remote LinkComm connections over the internet.
Receive command line commands via text messages; respond to said commands.
When the modem is online, LinkComm may be used to remotely connect to Satlink. Such
connections are very similar to being directly connected to Satlink via USB cable: one may
download the log, change the setup, and upgrade Satlink’s firmware.
There are several good reasons for including a cell modem in your Satlink station:
Two way communications
High bandwidth remote station access
Reliable and timely alarm notifications
Redundant telemetry
Please note that cell modem operation requires network coverage and network service.
Network service generally requires a service contract that involves monthly and/or per usage
charges.
12.2.1.
Antenna Placement
A Satlink with a cell modem must be installed in places with usable cell phone coverage. The
antenna aiming feature can help determine the quality of signal at installation time.
