Siemens SIMATIC PCS 7 CPU 410-5H System Manual page 248

Supplementary information
15.6 Communication services
S7 routing: TeleService application example
The following figure shows an application example of the remote maintenance of an S7
station using a PG. The connection to other subnets is set up via modem.
The bottom of the figure shows how this can be configured in STEP 7.
Figure 15-4
248
S7 routing: TeleService application example
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB