Siemens SIMATIC NETS7-1200 Operating Instructions Manual page 88

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C.2 TS Gateway
What functions does the TeleService gateway provide?
The TeleService gateway has the following functions:
● Switching station
● Configuration of the SMS gateway provider
Configuration with TeleService gateway
A TeleService gateway is intended for the following telecontrol systems in which TeleService
is used with GPRS:
● Configurations without a telecontrol server
● Configurations with telecontrol server
Range of performance of a TS Gateway
● Number of simultaneous TeleService connections: 1
Note
TS Gateway only for TeleService
TS Gateway is used only for the "TeleService" function via GPRS. No connections to the
remote stations can be monitored and no process data can be transferred.
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The TeleService gateway is a PC in the network that serves as the intermediary between
the engineering station and remote S7 station.
Since a firewall is normally closed for connection requests from the outside, a switching
station between the remote station and the engineering station is required. This switching
station can be a telecontrol server or, if there is no telecontrol server in the configuration,
a TeleService gateway. The switching station directs the messages via a tunnel through
the firewall. This allows access by the engineering station connected to a LAN to the S7-
1200 via a router and via the APN of the network provider.
With the help of TS Gateway, SMS gateway providers are configured that are necessary
for the sending of wake-up SMS messages to the remote S7 stations.
In configurations without a telecontrol server, a TeleService gateway is required for
TeleService via GPRS.
In configurations in which a second path needs to be established for TeleService via
GPRS alongside the telecontrol server, a TeleService gateway can be used.
This can, for example, be the case when certain people, groups or companies should not
operate TeleService via the telecontrol server or when access to the stations for
TeleService needs to be set up independent of the telecontrol server.
Operating Instructions, 09/2011, C79000-G8976-C247-02
CP 1242-7