The only reason I can think of is one for data and one for a smartgun perhaps but I'm pretty sure I'm missing something. Anyone want to list some examples of why you want more than 1 datajack?

Jacking into other devices while jacked into the Matrix, jacked into a vehicle and an RCD at the same time, using a skillsoft in one and jacked into a vehicle or Matirx, multiple external devices (tacking device and computer/phone).

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Thanks for the link!

Man and machine. P 46 I/O speed (optional rule). Lists the transfer speed at 1000MP/combat turn.

SR3 page 301, sim rig lists the wet record of a full x sim sense recording at 3MP/second. I believe this is what rigging and decking would use. An artificially generated uncompressed full X sim sense stream.

1000mp/3 seconds per combat turn 3/ mp per sim sense stream and allowing a pessimistic amount of loss for keeping track of them. a single data jack can simultaneously run 100 wet record full X sim sense channels.

It should be trivial to create an external router that would allow you to connect a large number of devices to a single data jack.

The only reason I would install a second data jack is that I want one hidden. I would probably use ether induction or fingertip compartment (although the loss of sensation would not be desirable.) placing a full induction data jack in the palm of your hand would be useful as it would serve to connect you to your smart link weapon as well as being a hidden data jack witch somebody with a cyber scanner may well mistake for a induction pad useless without a gun.

Edward

I once used it so that I could jack into my bike with one jack and access the map held on a modified pocket-secretary with the other.

The only other time I used both at once was trying to use a sniper rifle while jacked into the matrix. Surrogate smart-link and access to the security cameras. Luckily, I never found out if the walls were thin enough to pull that stunt.

(the pocket secretary comes from the sudden realisation that I might not want to lug around my entire deck when all I need is a floor-plan and my Radiohead MP3s)

i recall the only time there have been talk of 2 jacks in canon is when there is a rigger present. reason was that a rigger would have his jack placed further back to access the motor function areas of the brain. a decker or most other people would want to have it more towards the front to access higher brain functions. personaly i think this is a bit silly as with a bit of fiberoptics you could place the jack itself anywhere on the body and have the chip itself interface anywhere in the brain. didnt cp2020 allow for this?

Anybody who wants to be jacked in at the same time they're using a smartlink will need a second one.

Also, for those who rule that you can have two guns, each with smartlink (let's not get into that debate here), you'd need two jacks.

If your datajacks are all connected to one another, and you jack into multiple devices, you've just created a local area network inside your skull. My routing multiple data jacks together you can connect a car's sensor suite, to a radio and broadcast your car's sensor input without having to connect the two devices to eachother. Basicaly, with multiple data jacks, you become a walking network, capable of supporting the interface of any peices of electronics.

uh, you have 2 datajacks because your room mate is too cheap to buy a firewall...

ROTFL @ Bitrunner.

Reasons in order of importance.

1) Damnit, because it's cool! There's no way of saying "DECKER" better than an array of platinum datajacks down your skull. It's better than body piercing!

2) Different locations. My character has 2 in his temples and one in his wrist to plug his smartlink into. I don't like the induction pads in my palms, it's...icky.. and I don't want a cable running all the way up to my skull.

Also, apparently the different locations are for different tasks. Temples "frankenstein" for deckers cause it's closer to frontal lobe functions. Back of the neck "puppethead" to be closer to reaction centers for Riggers. Wrist for practicallity and ease of concealment. I don't believe this is even logical, practical or even offers any benefits number wise, but ..."Damnit, it's cool."

3) If one gets a jackstopper, they might miss the other(s).

4) They're cheap, both in price and in essence.

Yep...a normal datajack and a hidden induction datajack somewhere else. If they stopper one up, they should usually miss the induction jack. Then you hide a converter (in the best place to hide things from a search) and you just snuck a datajack in

one word, outch!

He'd be damned if some slant was going to put his greasy yella hands on his boy's birthright...
-Chris Walken

Ah the ass, the greatest place to hide things...I know that I would never search for things up there...I figure if something is that gross, the deserve to surprise me.

To confirm hobgoblin’s statements about jack placement I just watched a documentary on what amounts to early precursors of cyber eyes. These are being installed in people today.

The brain interface was in the visual centres near the front of the brain but the jacks where on the back of the scull.

Edward

Sorry. I must have misinterpreted the pictures of the surgery. It did look like there was a significant length of leads between the interface implant and the jack but it was difficult to tell details.

The lady that was used as an example in this documentary was having trouble interpreting the dots. I got the impression that driving a car even in a parking lot would be an unusually good result.

Edward

It was, the patient who drove the car was an ideal subject, because he'd had vision until fairly recently. A person who was born blind wouldn't have a visual cortex which would interpret the data as clearly. There's a lot of brain development which requires post natal input to occur. A classic experiment involved putting glasses on kittens that inverted their vision. When the glasses were removed after maturity, the cats were hideously disoriaented. A lot of neurology research was just awful

hmm, i wonder why they go straight for the visual cortex and not hook up to the allready existing nerve paths going back from the eyes. that is unless its exactly those paths that have been damaged...

decking and using a knowsoft

I would assume you go toe the visual cortex because it is a larger surface aria. It would be harder to icolate small bundles of nerves on eth optic nerve.

Also if the nerv runs under the brain it would be very difficult to access.

Of cause I am just guessing.

Edward

Contolling a toaster and coffee machine at once?

Im surprised there isnt an adapter that lets you plug several devices into on I/O. I know there are multiports in MM. I think its one of those things which look cool in art but has little use in game.

if'n i be playin a scurvy dog with a datajack, i throw an exta in with it.

Vile outlaw in the service of the Spaniards, here in the name of Queen Elizabeth I shall make you pay.

~J, talk like a privateer day

thanks you for that info, but i belived that all nerves where useing electrical signals between themselfs. and was there not some test done with a chip that worked as a replacement retina?

Nerves transmit electrical signals down the axon of each cell. Between nuroens there's a synapse gap. it's chemical neurotransmiters which bridge the gap. Zapping a neuron with electicity will cause it to fire. The paradox of what is currently understood about vision is that we've a fairly good idea of how the brain interprets the signals it gets, but the interface between the retina and the optic nerves is less well understood. It was simply easier to interface with brain. Vesides which, interfacing with the optic nevre would reuire taking out his eyes, which were intact and healthy, just not working. The risk of infection's a lot higher. This way, there's just a couple of wires into the skull.

The cyber retina is based on totally different properites of light en electricity then a human retina. human retinas are a vast feild of specialized cells which have a chemial interaction with light. Mechanical cameras (which this essentially was) use the physical properties of light, and the information gathered would rpobably have no relation towhat the optic nevre evolved to transmit. Heck, there's no way to transplant retinas now anyway. Bypassing the optic nerve is ironically, easier.

well one learns something every day. inform me when they are able to show messages in field of view (and better yet, when one is able to write/send said messages by thought)...

As soon as they hash out the whole subvocalizing sensors and induction microphones, we'll be pretty close to telepathy.

The item I am waiting for is the transducer. (MM p19)

Once we have that the rest will fall like dominos. And we aren’t that far off.

The same documentary I was watching had a shorter section on a group that taught a monkey to play a simple computer game. Wired electrodes into the motor function parts of the brain and worked out the signals it was sending to move its arm. When they thought they had it right they turned of the joystick and used the brain singles to work out where he wanted to move the curser and he was still able to play the game.

I am curious what the test subjects look like (how may wires and the like) but “cameras are not allowed in the primate lab” what would you think if aztechnolegy said that.

Unfortunately I was watching it at work so I wasn’t able to give the documentary my full attention.

Edward

Both my primate biology and neuroscience text books have photos of primates in neuroscience labs. It's not pretty. Animal testing is a thorny moral issue.

Oh, there's also cadavers too, but a lot of different groups fight tooth and nail for cadavers people "leave to science". Plastic surgeons practice givng the dead facelifts, and not all crash test dummies are manequins.

maybe it would have been for the better if cloneing tech got underway. want to pratice doing lasik, do it on a cloned eye. want to give a dead man a facelift? close the facial tissues and bones...

By SR time much of the simpler surgery will be taught on virtual cadavers through telecourses to the home. Live, non-clone subjects would be common only in experimental, cutting edge therapies, and not just because of the threat of shedim. And in such cases cadavers are needed using drones and simsense, similar to the valkyrie module, would be safest. Clone Rights Groups and Intelligent Animal Committees make good diversions for shadowruns, but they're a double edged sword - like any other cause based group.

Oh, of course they'll have better practice technology, but wouldn't you feel better not being a surgeon's maiden voyage?

That's why they don't tell you.

~J

remember that today commercial pilots spends months in simulators going over all kinds of technical and enviromental problems. and when they first take to the wings they are paired up with a experienced captain (atleast most likely). similar to surgeons in training would have months of virtual surgerys under their belt and when first starts out would have a experienced surgeon do overwatch, ready to take over at a moments notice. hell, we have university hospitals today where the doctors of tomorrow work while in training and all that they do a supervised by more experienced doctors. hmm, i wonder if a virtual car simulator would be an idea for teaching drivers all kinds of stuff without risking the life of driver, teacher and fellow drivers. sure it will not give them the feel for the egotistical driveing that some people have but it would be good as a dry run for people in a controled enviroment.

One of my favorite uses of the two datajacks is to use one to drive a car (via datajack, not rigged) and use a transduced comm on the other. There are tones of reasons to have two jacks.

Let me put it this way. There aren't many reasons to need two datajacks, but if you have two you can certainly find uses for them both, in all sorts of situations.

Perhaps not to need two, but there are plenty of reasons to want two.

~J