Assumption: In 206X computer technology is fast enough to process camera and Mic data into real time sim sense.

so you could put full helmet on corp guards that give them low light, flare comp, image mag, and enhanced audio. The only cyberware they would need is a data jack. Tie in radio link, limited building orientation system, and external smart link. He would go from putz to dangerus putz real quick.

Take it a bit further and put some kind of limited battle tac master unit in the building and all sort of things are possible. System knows where the guard is at all times, where he should be, can get you a picture of what he looking at, and if you want to make life real hard on the runners what his physical condition is.

Corps could stop up grading their guards with cyberware and give them more options at one third the cost, share one helmet over 3 shifts. Corps could pump small amounts BTL code in and make guards really like their job, not fall asleep, or large amounts of BTL and make them frenzied killing machines ready to die if they can take a runner with them. But no corp would abuse the system like that.

you can already do the helmet thing, no datajack necessary (minus the enh audio). your battletac idea has merit--make it a function of either the Matrix security system, or the CCSS security system.

Then the guards automatically fail any chance whatsoever to see through a force one Concealment or Improved Invisibility. Not a good idea.

BTL doesn't process well through trodes -- other than that, the idea itself has merit.

If the designers ever develop the idea of p-fix emotional chips like Loyalty or Aggression, expect to see a rise in dedicated chipjacks.

Bit -- I thought illusions were directed against the mind, which means there isn't any difference between helmet based senses and implanted 'ware.

-Siege

Aside from the BTL stuff, everything you've mentioned is easily doable. You don't even need a datajack, really. Just build all the visuals into the helmet visor, and add some earphones.

Aaaah ignore me, for some reason I was thinking that there was no physical visor he was looking out of, just a display screen.

if you completely replace your base sensorium with simsense, you'll be immune to mana-based illusion spells of all types, but you'll be highly vulnerable to physical illusions.

Hmm, but how expensive are cybereyes in the first place? Your guards will still need augmentation to bdy, str, and init if they're going toe to toe with street samurai, in comparison the senseware is a tiny bit of essence and a few thousand nuyen.

you don't need augs to beat street sams, you just need more numbers and better tactics. one on one, a street sam is a match for any single sec guard you throw at him--which is why you don't throw one, you throw fifty.

Or it's why you don't go at the sam guns blazing, but lead him into one of the hallways with a built in countermeasure. Kinda hard to kill all the guards when you are knocked out by the neurotoxin spray.

Ok I see basically 3 things being bated around here.
***Since it is wordy and sounds like a tung twister in my head I will refer to sim sense senses as SSS from now on.

1. SSS vs Illusions
The helmet as I saw it enclosed the whole head other wise what you see would get confused with your SSS. So yes the guards would be completely helpless against Improved Invisibility with out an ultrasound module. I to believe that Silence must be used to fool ultrasound. unless some one knows of rules for Improved Invisibility vs senor rating.

I dont really think the Improved Invisibility weakness is so bad. Even with out an ultrasound unit the guard with better hearing stands a better chance to find someone using Improved Invisibility then an average guard seeing through the spell. With an ultrasound sound unit he stands a really good chance.

Against normal Invisibility I think the target numbers would be the same.

2. SSS and BTL
This is more of a plot hook then a thing that would effect runners. I think the radio link to the helmet and some type of battle tac system is far more scary to the runners.

3. SSS vs Standard Cyberware
Look at it from the corp stand point. Senseware is cheep but SSS is a third cheaper. SSS comes in a box Cyberware means operations, down time, dealing a lot with a third party. Cyberware is hard to reclaim if a guard quits, is fired , or dies. SSS just gets cleaned and handed to the new guy.

I feel that other then a smartgun link the only thing that is really important to a guard is senseware and communication. These guys spend 99.5% of there time just looking around. They are never going to come close to matching a shadowruner. They are just there to tell every one where the shadowruners are so 12 of them can get to the place and slow the runners down till the people that can deal with them get there.