> For the complete documentation index, see [llms.txt](https://help.highlight.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.highlight.net/functionality/broadband-clarity.md).

# Broadband Clarity

## Overview

Broadband Clarity works based on the ADSL-LINE-MIB and the VDSL-LINE-MIB.

The ADSL-LINE OIDs we look at are the same as for bandwidth discovery:

| MIB Object             | Description                         |
| ---------------------- | ----------------------------------- |
| adslAtucChanCurrTxRate | Inbound ADSL bandwidth (downstream) |
| adslAturChanCurrTxRate | Outbound ADSL bandwidth (upsteam)   |

The specific OIDs in the VDSL-LINE used is more complex as it's a table rather than a straight OID look up. Comtrend devices use the VDSL-LINE-MIB; other vendors may also use this MIB.

Highlight provides a workaround for Cisco FTTC / VDSL2 services. Instead of looking at the parent of the Ethernet0 for the sync speed, Highlight retrieves the bandwith from a non-existent ADSL-ATM0 interface.

Highlight can support multiple DSL interfaces on a router so long as the stack table is correct.

## Related

* **Troubleshooting: Broadband Clarity**
* **Enabling Broadband Clarity on the Edit Watch Admin page**


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