For security reasons, Hub servers prevent SSH access from outside of the internal network on which the server runs. This helps prevent hackers from gaining access to the system, but also means users can't access FMS when they're off-site.
By using HubSSH you can access internal FMS systems while out of the office, thus allowing you to perform whatever actions you would normally need to do in the office via your Android device.
Note: depending on the keyboard you have installed, you may or may not have access to function keys, which are necessary for many FMS operations.
Hub recommends using "Hacker's Keyboard", a keyboard which contains function keys like you'd find on a full-sized keyboard.
To do so, install the following: https://play.google.com/store/apps/details?id=org.pocketworkstation.pckeyboard
Next, open the program. You'll be taken to a screen with four buttons up the top, and instructions on how to enable Hacker's Keyboard.
As per the instructions, and with one necessary addition:
-Hit "Enable keyboard"
-Tap on Hacker's Keyboard (the option should be checked)
-On the right side of the "Hacker's Keyboard" option (and for each of the other options) you will see a settings icon. Click on the settings icon for Hacker's Keyboard.
-Tap on the third option down, "Keyboard mode, portrait"
-Select "Full 5-row layout"
-Hit your device's back button twice to go to back to the instructions page
-Hit "Set input method"
-Tap on "Hacker's Keyboard"
You now have Hacker's Keyboard set as your default keyboard.