> For the complete documentation index, see [llms.txt](https://bitel.gitbook.io/bitel/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bitel.gitbook.io/bitel/master.md).

# Introduction

### What is Bitel

Bitel is a general purpose **Voice** and **SMS** service tailored for customer interaction. 

{% hint style="info" %}
Before further reading, register in [*bitel.rest*](http://bitel.rest) and create your first project to get a **JWT token**.
{% endhint %}

### How Bitel Works

* [Authorization](/bitel/authorization.md)
* [API Structure](/bitel/api-structure.md)
* [API Errors](/bitel/general-api-errors.md)

### Sending SMS 

* [Single SMS](/bitel/sms/single-sms.md)
* [Batch SMS](/bitel/sms/batch-sms.md)
* [SMS Detail](/bitel/sms/sms-detail.md)

### Making Calls 

* [OTP Call](/bitel/call/untitled.md)
* [Single Call](/bitel/call/single-call.md)
* [Batch Call](/bitel/call/batch-call.md)
* [Text To Speech Call](/bitel/call/batch-text-to-speech-call.md)
* [Call Detail](/bitel/call/call-detail.md)

### Code Samples

* [x] [C#](/bitel/code-samples/c.md)
* [x] [PHP](/bitel/code-samples/php.md)
* [x] [Python](/bitel/code-samples/python.md)
* [ ] Java(coming soon)
* [ ] node.js(coming soon)
* [ ] Go(coming soon)

#### We are here to answer you questions

:telephone: **021-75416000**