The C6 router M1 and M2 cellular versions can connect remotely using 4G GSM networks. These versions contain EDGE/HSPA quad-band technology. The router has one SMAStecker plug for an auxiliary diversity antenna and one push-push type mini socket for a SIM card. It can be used on any GSM network, in any country. The cellular versions are reliable tools for secure, remote PLC maintenance and commissioning with data logging capabilities, especially in hard-to-reach locations. Logged data can be pushed to cloud-based services.