> For the complete documentation index, see [llms.txt](https://developer.ecall-messaging.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.ecall-messaging.com/api-references/smpp/getting-started.md).

# Getting started

### Core features

* Send single-part and multi-part SMS messages.
* Receive delivery receipts.
* Forward inbound SMS to your client.

### Prerequisites

* You need an active eCall account.
* SMPP access must be enabled on your account.
* Your client must support **SMPP v3.4**.
* Your client must support **TLS 1.2** or **TLS 1.3**.

### Single-user or multi-user setup

You can use the SMPP interface for one user or many users.

Contact support when you need a multi-user setup.

### Protocol specification

This interface follows **Short Message Peer to Peer Protocol Specification v3.4**.

Use the version dated **12 October 1999**.

### Connection details

| Parameter | Value            |
| --------- | ---------------- |
| **Host**  | `smpp.ecall.ch`  |
| **IP**    | `193.93.208.139` |
| **Port**  | `2776`           |
| **TLS**   | `1.2` or `1.3`   |

{% hint style="warning" %}
Plain TCP is not supported. Use TLS for every connection.
{% endhint %}