> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# What is TED Lerian?

> TED Lerian is the interface Lerian offers over Lerian SPB: the API, the ledger events, and the operator workflows for TED-family transfers.

**TED Lerian** is the interface that Lerian offers over **Lerian SPB**. Lerian SPB is Lerian's own messaging connector to the **STR** (Sistema de Transferência de Reservas). It is a direct connection with no connectivity partner in the path.

Through TED Lerian, an institution sends and settles interbank and large-value wire transfers, the TED family. TED Lerian gives you the API, the ledger events, and the operator workflows. The rail carries the message and its settlement state. Your ledger consumer records the money movement.

* [What is Lerian SPB?](/en/rails/native/spb/what-is-lerian-spb) (the rail below this interface).
* [Integrating with TED Lerian](/en/interfaces/ted-lerian/ted-lerian-integration) (the event families, the ledger integration, and the API conventions).
* [Operating Lerian SPB](/en/interfaces/ted-lerian/ted-lerian-operations) (the operating windows, the certificate rotation, and the reconciliation).