RJ45 to USB C: Starting From the Wall-Port Side
If you start from the RJ45 – the 8P8C jack in the wall, the patch panel, or the back of a switch – then the part you need is described as ‘RJ45 to USB C’: the connection between the network’s jack and a computer’s USB-C port. This guide works from that wall-port side: what the RJ45 end is, what the USB-C end is, and the adapter that actually joins them, plus the speed ratings to state when ordering from the network side.
Quick Answer / Technical Summary
RJ45 to USB C describes the wired-network connection from the network side: the RJ45 end is the 8P8C Ethernet jack (wall, patch panel, switch), and the USB-C end is the plug that goes into the machine. The part that joins them is a USB-C Ethernet adapter – a USB-C plug on the machine side and an RJ45 port in the body, with a network controller inside – not a plain cable, because USB and Ethernet are different signals. Read it from the wall side and order the C-to-RJ45 adapter at gigabit (or 2.5G where the port supports it).
The RJ45 End: The 8P8C Jack
The RJ45 is the 8-position, 8-contact Ethernet jack – the socket in the wall, the patch panel, and the switch. It carries the wired network. When a connection is named ‘RJ45 to USB C,’ this jack is the starting point: the network side of the link.
Everything on the RJ45 side is standard Ethernet – the adapter’s job is the other half.
The USB-C End: The Machine’s Port
The other end is the machine’s USB-C port – the small oval, reversible opening on a laptop or desktop. It does not carry Ethernet wiring, so the USB-C end of the link needs an adapter with a network controller to become a network connection.
The C port is where the computer side of ‘RJ45 to USB C’ lives.
The Adapter That Joins Them
The part is a USB-C Ethernet adapter: a USB-C plug that goes into the machine, an RJ45 port in the body that takes the patch cable from the wall, and a network controller that turns the USB data into an Ethernet interface. It is an adapter with a port, not a wire – the two signals meet inside the body, not in a cable.
From the wall-port side, ‘RJ45 to USB C’ resolves to this one part.
Ordering From the Network Side
When the order comes from the facilities or network side, state the part as a C-to-RJ45 adapter with the rating – gigabit for the common case, 2.5G where the port and network support it. The RJ45 port on the adapter takes the same patch cable as any wall jack, so the network side of the install is unchanged.
Same wall cabling, same patch lead – the adapter only changes the computer end.
Technical Specifications & Performance Benchmarks
| Side | What It Is | In the Setup | Note |
|---|---|---|---|
| RJ45 | 8P8C Ethernet jack | Wall / panel / switch | Standard network side |
| Patch cable | Cat5e / Cat6 lead | From wall to adapter port | Unchanged by the adapter |
| USB-C | Machine’s oval port | The computer side | No native Ethernet |
| Adapter | C plug + RJ45 port | Joins the two ends | Network chip inside |
| Rating | Gigabit / 2.5G | Match port and LAN | 2.5G needs a 2.5G port |
Industrial & Enterprise Application Scenarios
- Wall Port to a Slim Laptop: The office wall’s RJ45 jack reaches a USB-C-only laptop through the C-to-RJ45 adapter – the network side keeps its patch cable.
- Patch Panel in a Rack: A rack’s RJ45 panel feeds USB-C workstations, each with a C-to-RJ45 adapter at the desk.
- Ordering From Facilities: A network-side request for ‘RJ45 to USB C’ resolves to the gigabit C-to-RJ45 adapter, stated with the rating for the estate.
- Switch Port to a Kiosk: A kiosk’s USB-C machine takes the wall’s RJ45 through the adapter, the switch port side unchanged.
System Integration & Recommended Connectivity Infrastructure
To build a complete workstation or AV/network connectivity stack, pair these adapters, hubs, and conversion parts with our certified data, video, and network interconnect range:
- ethernet cable: The RJ45 side of the link runs over an ethernet cable – the patch lead from the wall or panel to the adapter’s port.
- usbA/C to lan cable: The C-to-RJ45 adapter is the USB-C member of the usbA/C to lan cable range that joins the wall-port side to the computer side.
- type c-hub: When the machine also needs USB or charging at the same port, a type c-hub with Ethernet bundles the RJ45 link with the other ports.
- fiber optic cables: Where the wall side is a long run, fiber optic cables carry the network to the panel that the RJ45-to-USB-C link starts from.
Frequently Asked Questions (FAQ)
Q: What does ‘RJ45 to USB C’ mean?
It names the wired-network connection from the network side – the RJ45 jack (wall, panel, switch) on one end and the machine’s USB-C port on the other. The part that joins them is a USB-C Ethernet adapter.
Q: Is it a cable or an adapter?
An adapter – a USB-C plug plus an RJ45 port in the body with a network controller inside. USB and Ethernet are different signals, so a plain wire between the two ends cannot carry the connection.
Q: Does the wall cabling change?
No – the adapter’s RJ45 port takes the same Cat5e/Cat6 patch cable as any wall jack. Only the computer end of the install changes, from a built-in RJ45 to the C adapter.
Q: What rating should I order?
Gigabit for the common case. State 2.5G only where the USB-C port and the network both support it – the rating is the second spec after the two ends.