User might just execute one transaction/program but STAD might display many entries for that single transaction/program  each entryis a dialog step in SAP term. How many dialog-steps are displayed under a transaction/program is related to program/transaction design and how that transaction is executed.
Connections of the types TCP, ISO-on-TCP, UDP, ISO and S7 connection are configured in the SIMATIC Manager in NetPro. These connections are configured in the same way in STEP 7 (TIA Portal). In STEP 7 (TIA Portal) the S7 connections have to be configured in the Devices and Networks editor, in the Network view.
This operating mode of uniSwitch Softswitch mimics Routed Mode with the difference that H.245 call signaling is handled by the participating gateways, not the VoIP softswitch. Routed Mode w/o H.245 enables uniSwitch to reduce further bandwidth utilization while still preserving substantial degree of call control.