Patch Cable vs Crossover: The Only Difference That Matters
Side by side they are indistinguishable. Internally, one swaps two pairs, and that decides everything.
Quick Answer
| Attribute | Patch cable | Crossover |
|---|---|---|
| Internal wiring | Same colour order both ends | A and B standards at opposite ends |
| Default wiring | T568B, or T568A in some regions | Mixed |
| Connects | Device to infrastructure | Device to device |
| Needed on modern ports | Always | Rarely |
| Cost and availability | Everywhere | Specialist |
Identifying Each
The colour test
Hold both ends together. Same colour order is patch, different order is crossover.
Labelling
Commercial crossovers are usually labelled, but never assume.
Behaviour test
A crossover between a computer and a switch works on modern ports, so behaviour no longer identifies anything.
Tester
A wiremap tester settles it definitively.
What to Buy
- Patch cables, for every modern need.
- One crossover, if legacy equipment exists.
- Higher category over crossover, when upgrading.
- Label anything unusual in the spares box.
- Retire crossovers as equipment is replaced.
Real-World Applications
- Standard patching at desks and racks.
- Legacy equipment connections.
- Sorting mixed cable inventory.
- Teaching the wiring history.
Related Guides
For the patch lead basics, read what is a patch lead. For the LAN comparison, see crossover vs LAN cable. For wiring detail, start with crossover Ethernet wiring.
FAQ
Is a patch cable always straight?
In practice, yes. A crossover built from patch cable is still called crossover.
Can I use a crossover instead of patch?
On modern ports, yes. The swap is handled automatically.
Which is more common?
Patch cables, overwhelmingly.
Does the difference affect speed?
No. Both carry the same speeds when working.