Itronix T5200 User Manual page 22

If you are registering with a Cellular provider for data service, your
modem's Electronic Serial Number (ESN) will be printed on a
label as shown below.
If you are registering with a Cellular provider for CDPD service,
your modem's Equipment Identifier (EID) will be printed on a
label as shown below.
Your modem generates radio frequency (RF) signals.
Do not operate the radio modem before you have registered it
with a network provider. The network will not accept a signal
from an unregistered device. Unauthorized use of your radio
modem may interfere with local business or government
communications, resulting in fines or other legal action.
While the radio is operating, its antenna must be at
least 29mm (1.25 inches) from all persons in order to comply
with the FCC RF exposure limit. Radio operators must make
sure their radio unit is in compliance with these FCC regula-
tions.