Siemens SIMATIC S7-1200 Manual page 153

Direct communication between stations
Figure 7-5
In this configuration, two SIMATIC S7-1200 stations communicate directly with each other
using the CP 1242-7 via the GSM network. Each CP 1242-7 has a fixed IP address. The
relevant service of the GSM network provider must allow this.
TeleService via GPRS
Figure 7-6
Easy Book
Manual, 11/2011, A5E02486774-04
Direct communication between two S7-1200 stations
TeleService via GPRS
Easy to communicate between devices
7.9 GPRS
153