TS-7250-V3 USB Ports
From embeddedTS Manuals
The TS-7250-V2 has 2 USB type A host ports. The bottom USB host port can optionally be routed to the #XBEE Header for USB cell modems.
# Route USB to XBEE
gpioset 2 28=1
# Route USB to bottom of J2
gpioset 2 28=0