ss L_EstabReq <<Block DLCa>> process DLC_1_5 BtoA_1_2 (0, true) V76frame (SABME (.0.)) T320(12.0000) V76frame L Establnd (SABME : (.0.)) L EstabResp process Block DLCb>> (0, false) DLC_1_6 V76frame V76frame (UA:(.0.)) V76frame (UA : (.0.)) (UA:(.0.)) EstabConf Figure 4.13 The MSC simulation trace 48 Validation of Communications Systems with SDL I. Save the simulation commands into a file: in the Simulator, select Log > Save Input History12, select All files, enter cnx1.com and press OK. J. Open the file cnx1.com with a text editor13, and if necessary add a return in the two lines: Next-Transition 1 /* "No" */ to get: Next-Transition 1 /* "No" * / Remove the two lines: efine-MSC-Trace-Channels on tart-Interactive-MSC-Log 0 K. Save the file and close the text editor. Later, you will do File > Restart and Execute > Command Script to replay the file cnx1.com automatically. Here is the content of cnx1.com (the first line starts the SDL trace): Set-GR-Trace 1 Next-Transition Next-Transition ext-Transition Next-Transition Output- - To L_EstabReq (0) <<Block DLCa>> dispatch Next-Transition Next-Transition Next-Transition 1 / * "No" * / Next-Transition Output-To L EstabResp <<Block DLCb>> dispatch Step-Symbol Next-Transition Next-Transition Next-Transition 1 / * "No" * / Next-Transition Next-Transition Do not exit from the Simulator. Save Command History also works, but it also contains commands that have been undone or commands entered before Simulator restart. 13 To easily open any file in Windows, we recommend you to create a shortcut to WordPad on your desktop. Then simply drag the file on the shortcut to open it. Interactive Simulation 49 4.2.2.3 Play the other scenarios Once the DLC connection is established (if not, play the scenario described in Section 4.2.2.2), continue the simulation, playing the following three scenarios (important: play them in sequence, i.e. never reinitialize the Simulator): A. Simulate XID, described in Figure 3.4: send signal L_SetParmReq to << Block DLCa >> dispatch, press Go and select 