Siemens SIMATIC S7 Operating Instructions Manual page 65

SIEMENS AG
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actively by the PLC, in this instance it is required to activate a ring
indication in the PG/PC using the ts_set_ringindicator function.
After the TeleService connection has been established successfully, the user
can establish a connection to the PLC connected to the TS adaptor using the
load_tool function. It is possible to use any amount of PRODAVE functions.
This is followed by closing the connection to the PLC using the unload_tool
function and closing the TeleService connection by means of ts_hang_up_dial
or ts_hang_up_ring.
Note:
After establishing a remote connection this remains active until the user
program calls the ts_hang_up_dial and / or ts_hang_up_ring functions!
Toolbox for Data Link PGs/PCs to SIMATIC S7
61
PRODAVE S7