I suppose the difficulty I have Groking the SR4 setup is in many ways the commlink itself.
I am attempting to clear this out of my head and get it straight as well as have others beat the mechanics into my head.
SR3: No Hub, all systems standalone. No wireless, nothing can be hacked.
Implanted smartlink
Wired reflexes
Retractable Spur
Datajack
Chipjack
SR4: Possibility of connection but not required
Implanted smartlink
Wired reflexes
Retractable Spur
Datajack
All the above can be standalone but they can also all run through the commlink, if I want to share data with someone else. But it isnt required, ala I dont have to connect my spur to my comm to activate it, but If I wanted too it could be a second method of activation, as well as a 'monitor' for my teamates or hackers (yay).
Trying to lay out all the scenarios
1. However, with a fully stand alone system and no commlink I cannot experience AR or VR.
2. With a fully standalone system and a commlink without a sim module, I still cannot experience AR or VR (as per p.209 left column 6th paragraph and p.228 right column 3rd paragraph.) But I can make phone calls, check the matrix and Not get in trouble by the law for lack of ID.
3. With a fully standalone system and a commlink without a sim module but with simrig or trode net or datajack, I cannot experience AR or VR. (as per p.209 left column 6th paragraph and p.228 right column 3rd paragraph.) But can experience "Direct Input" BTLs.
4. With a fully standalone system and a commlink with a sim module and simrig or trode net or datajack, I can experience AR or VR and "DreamDeck" BTLs , as well as Knowsofts and Linguasofts.
Finally:
5. a fully connected wireless cyberware system with a commlink + sim module + simrig/trodenet/datajack, I can do it all. Including get AR bonus with teamates. All I have to worry about is getting hacked.
Though I suppose the commlink serves as the master gateway (which is more difficult to hack) for the cyberware instead of attempting a direct hack on a standalone cybersystem (whish should be easier to hack?). Then again if everything is skin linked or old school fiberwire connected then no worry there.
Again, I do believe the commlink is the culprit for my difficulties.