WP-2641M-CE7 (WinCE7 Based) User Manual v 1.0.1 Page: 147
A.5. How to Using the Practical Functions of the 3G/4G I/O Module
The Mobile network module of WinPAC series (Except for WP-2641M-CE7) that use the 3G/4G network
to implement SMS and GPRS connection to send and receive functions.