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ATM UNIs and their associated port speeds are specified in the following chart.
| ATM UNI | Port Speed |
| DS-0 | 0.064 Mbps |
| DS-1 | 1.544 Mbps |
| 2xDS-1 | 3.088 Mbps |
| 3xDS-1 | 4.50 Mbps |
| 4xDS-1 | 6.0 Mbps |
| 5xDS-1 | 7.50 Mbps |
| 6xDS-1 | 9.0 Mbps |
| 7xDS-1 | 10.50 Mbps |
| 8xDS-1 | 12.0 Mbps |
| DS-2 | 6.312 Mbps |
| DS-3 | 44.736 Mbps |
| DS-4 | 274.176 Mbps |
| OC-3 | 155.520 Mbps |
| OC-12 | 622 Mbps |
| OC-48 | 2.4 Gbps |
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