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# Capabilities

The **capabilites** tab lets you turn various xDSL capabilites on or off.

##


^ Profile ^ Description ^ Comment ^
| US0 | Upstream 0 Band. | 20 to 138 kHz |
| Bitswap | [Bitswap](/glossary/b/bitswap). | Used for DMT [modulation](/glossary/d/dmt). |
| SRA | [Seamless Rate Adaptation](/glossary/s/sra). |  |