• | 0 (8b): Suitable for long or low-quality cables, but has a slower data rate. |
• | 1 (12a): A good compromise for medium-length cables, or cables that are of marginal quality, and provides a medium-speed data rate. |
• | 2 (30a): Suitable for short cables. Provides a fast data rate. |
• | 3 (30a): Provides the fastest data rate but is only suitable for very short cables. |