> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-3-3/hardware/tdm-network/create-ds3-configuration.md).

# Create a DS3 Configuration

> **Applies to:** Tmedia 3.0, 3.2, 3.3

Create a DS3 line interface for as many as 3 physical DS3 lines. To each DS3 line interface assign it an index number from 0 to 2. Once this is done, assign a DS3 line service to each DS3 line interface. Finally, to the DS3 line service, either create up to 28 T1 line services or 21 E1 line services.

![DS3 LI LS UseCase](https://docs.telcobridges.com/w/images/5/53/DS3_LI_LS_UseCase.png)

| (Step 1) Create DS3 Line Interface(s)                                                                                                                | (Step 2) Create DS3 Line Service(s)                                                                                                                                                                                                                       | (Step 3) Create T1 or E1 Line Service(s)                                                                                                                                                                                                                                                         |
| ---------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| \*[Create DS3 Line Interfaces](/tmedia-documentation/configuration/web-portal-3-3/hardware/tdm-network/creating-a-line-interface.md) \*\* Type = DS3 | \*[Create DS3 Line Services](/tmedia-documentation/configuration/web-portal-3-3/hardware/tdm-network/creating-a-line-service.md) \*\* Type = DS3 \*\* T1 or E1 payload \*\* Framing (M23, CBIT) \*\* AIS detection algorithm \*\* OOF detection algorithm | \*[Create T1 Line Services](/tmedia-documentation/configuration/web-portal-3-3/hardware/tdm-network/creating-a-line-service.md) \*\* Type = T1 or \*[Create E1 Line Services](/tmedia-documentation/configuration/web-portal-3-3/hardware/tdm-network/creating-a-line-service.md) \*\* Type = E1 |


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