The Quick Start guide for the N311z has the same jack labeled "headphone/microphone" connector. In other words a combo jack. If the N311z does actually have a combo jack then it is possible that the N411z does also even though it is labeled as "Audio out/headphones".
A combo connector works with smart phone headsets, the kind that has an inline mic.. That kind of headset has a single mini plug with 4 segments instead of the normal 3 segments. A combo jack will work with a regular headphones but not with a regular mic because of the positioning of the contacts. You need an adapter to get a mic to work with that kind of jack -- if the N411z even has that kind..
I just received my 14z (N411Z) and was able to verify that the headphone jack on the system IS INDEED the dual headphone/microphone connector. Per post from jimco you would need to use the 'smart phone headset' - that's the one I used. I will try the 'regular' microphone and update with the results.
here is a summary. If you have a laptop with a combo jack socket -- that means just one jack for both a mic and a headphone set -- you can use:
> or a smart phone headset
> or an adapter that will allow you to use a regular headset or mic. An adapter would be like the Headset Buddy shown here;
Note that the plug of the Headset Buddy has 4 segments and that is what you need with a combo jack. The other end has a jack socket for headphones and one for a mic.