Sierra Wireless RAVEN 1X 20070914 - Manual (Page 74)

Data Communication and Host Modes
Rev 3.0B Feb.08 69
and is billable by Sprint. The following *IPPING settings will
incur approximate monthly data usage in addition to any other
data usage:
*IPPING Estimated Usage
15 minutes 400k / month
30 minutes 200k / month
60 minutes 100k / month
120 minutes 50k / month