Description Of The Device; Connection Via Mobile Wireless And Internet - Siemens SIMATIC NET SCALANCE M875 Operating Instructions Manual

Industrial remote communication remote networks

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Description of the device

1.1

Figure 1-1

Wireless connection via the mobile wireless network

With the M875, you can establish wireless access to the Internet or to a private network. This

is possible at any location at which a mobile wireless network is available that provides

packet-oriented data services.

With UMTS, these are the data services HSPA Data Service or UMTS Data Service.

With GSM, these are the data services EGPRS or GPRS.

For the wireless connection, you require a SIM card of a mobile wireless provider with the

required data services activated.

The M875 can then connect locally attached applications or entire networks to the Internet.

Direct connections via an intranet to external partners connected to it are also possible with

the M875.

Private and public VPN

Via the public mobile wireless network, the M875 can establish a Virtual Private Network

(VPN) between one or more local networks and one or more remote networks. These

connections are protected from access by third parties by Internet Protocol Security (IPsec).

Here, communication is possible both via a public as well as a private VPN tunnel.

SCALANCE M875

Operating Instructions, 12/2012, C79000-G8976-C258-02

Example of connecting a station to the master station via Internet and mobile wireless

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