| name | speed | connector | use | compatible standards |
| CAT 1 | - | RJ-45 | vioce | - |
| CAT 2 | 4 Mbps | RJ-45 | LocalTalk | - |
| CAT 3 | 10 Mbps | RJ-45 | Ethernet | 10baseT 100baseT4 100baseT2 |
| CAT 4 | 20 Mbps | RJ-45 | Token Ring (16 Mbps) | 10baseT 100baseT4 100baseT2 |
| CAT 5 | 100 Mbps | RJ-45 | Fast Ethernet | 10baseT 100baseT4 100baseT2 100baseTX |
| CAT 5e | 1000 Mbps | RJ-45 | Giga bit Ethernet | 10baseT 100baseT4 100baseT2 100baseTX 1000baseT |
10/100baseT CAT5 pinout
| pin | signal | color |
| 1 | out + | white w/ orange stripe |
| 2 | out- | orange w/ white stripe |
| 3 | in+ | white w/ green stripe |
| 4 | n/a | blue w/ white stripe |
| 5 | n/a | white w/ blue stripe |
| 6 | in- | green w/ white stripe |
| 7 | n/a | white w/ brown stripe |
| 8 | n/a | brown w/ white stripe |
10/100baseT CAT5 crossover cable
| pin | <---> | pin |
| 1 | 3 | |
| 2 | 6 | |
| 3 | 1 | |
| 4 | 4 | |
| 5 | 5 | |
| 6 | 2 | |
| 7 | 7 | |
| 8 | 8 |
Page 1 of 1