Cat5, Cat5e, and Cat6 Ethernet Cable Differences
Understand why original Cat5 can limit a wired network, how Cat5e differs, and why Cat6 is a sensible choice for new Ethernet runs connected to Starlink.
Understand why original Cat5 can limit a wired network, how Cat5e differs, and why Cat6 is a sensible choice for new Ethernet runs connected to Starlink.
Terminal cable or home-network cable?
First identify which link you are replacing. A Starlink terminal cable can carry power and use model-specific connectors. The Cat rating on a home-network Ethernet cable does not establish that it can replace that terminal cable.
For Ethernet between your router, switch and computer, check the ports' supported rate and the cable category together. The slowest link limits the negotiated connection.
| Cabling | Practical reference for an ordinary Ethernet channel |
|---|---|
| Existing Cat5 | Identify and test it; a blanket 100 Mbps ceiling is misleading |
| Cat5e | Common choice for 1 Gbps over a properly installed 100 m channel |
| Cat6 | Supports 1 Gbps at 100 m; 10 Gbps reach depends on installation and interference |
| Cat6A | Designed for 10 Gbps at a 100 m channel |
The channel includes patch leads, connections and installed cable. Category labels do not guarantee that damaged or poorly terminated cable performs to specification.
Diagnose a slow wired link
- Check the negotiated Ethernet speed in the computer's adapter status or the router/switch port status.
- Compare that value with both devices' port specifications. A 100 Mbps port cannot negotiate gigabit with a better cable.
- Try a short, known-good compatible patch cable on the same ports.
- If the short cable works at the expected rate, inspect the installed run and its terminations. If it does not, investigate ports, adapter settings and the device.
A gigabit link does not mean your internet test must reach a gigabit. Compare local link performance and internet performance separately before buying replacements.
For a detached building, choose a suitable building-link design rather than automatically extending copper Ethernet outdoors.
Next useful guides
Use the instructions for your exact kit.
Check the official Starlink app and hardware instructions before changing installation, equipment or service settings.
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