Whoa. More acronyms and history I don't have reference for.
You are telling me HMP is old? What is current?
You mentioned SR 6.x. Does SR = Standard Runtime Library? If so, the latest PDFs on www.dialogic.com/.../hmp30win say they are V5. What is this 6.x?
To answer your question:
I'm attempting to use the provided inbound.cmd with this line uncommented
sr6callp mode=inbound type=JctAnalog protocol=pdk_na_an_io vox=dxxxB1C1 dropOnConnected=0 playFileName=SitNoCircuit.vox
I'm being told that HMP is the layer over PSTN and IP.