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ThinkPad T480s – What is this port? (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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What is the port to the right on the two USB C ports? To the left of the RJ45. (ThinkPad T480s with integrated graphics.)

Edit to add: thanks in advance!

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[–] [email protected] 14 points 1 year ago* (last edited 1 year ago)

In a bold attempt to force people to switch to new docking stations and hence abandon the old ones (where you docked the notebook via a proprietary port on the bottom of the machine), the "new" generation of docking stations had kind of a lever that was pushed into this abomination of a usb-c/thunderbolt slot. When we rolled out these new docks quite some users got confused, as you still "click" in the notebook into the new dock, but additionally have to push in this kind of new "lever". Also, users got confused where to plug in the usb-c cable when not using the new dock 😬

[–] [email protected] 14 points 1 year ago (3 children)

https://download.lenovo.com/pccbbs/mobiles_pdf/t480s_ug_en.pdf (page 21)

According to the manual, it's a docking station connector.

On my X1 carbon, I have a similar-looking port but it's for the ethernet adapter.

[–] [email protected] 6 points 1 year ago (1 children)

That connector is the ethernet connection for the docking station. That provides a real ethernet connection on the dock rather than using a USB to ethernet adapter.

[–] [email protected] 1 points 1 year ago (1 children)

What is real ethernet but a PCIe to Ethernet adapter?

[–] [email protected] 10 points 1 year ago

Using the NIC that's on the CPU/chipset (I forget which) allows it to use the same MAC regardless of which docking station or adapter is used, simplifying management. It also means that vPro, wake on LAN etc. work - neither are generally a concern for a home user, but both can be desirable in the large enterprise/government situations these are built for.

[–] [email protected] 2 points 1 year ago

Thanks mate!

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

Yeah on my 7th gen carbon it’s an Ethernet extension connector.

Probably also works with this? That or the dock.

Edit: clearly redundant with the Ethernet port on the right, which the carbon lacks. So yeah, for the dock.

[–] [email protected] 4 points 1 year ago

It’s for connecting to a docking station like this like this

[–] [email protected] 3 points 1 year ago

Like some others have said, it’s a docking port of some sorts but I’ve never seen it in practice. In our company we buy the universal hybrid usb C docks and they are great. The connector has also a more useful secondary USB C port which you can use for charging if the primary port dies for some reason, saved us on numerous occasions that way so the user can work while we prepare a replacement machine.