![(Small Instrumentation Modules)](https://d27wgn5g4t3wja.cloudfront.net/img/4f43849c-3483-4efa-950a-af1be0586562/82327.png)
(Small Instrumentation Modules)
SIM900 - Stanford Research Systems, Inc. (SRS)
The SIM900 Mainframe is the platform on which a SIM system is assembled. The mainframe provides power, computer interfaces, clock synchronization, and individual module status. Eight internal module slots accommodate single-width and double-width modules.