> 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/verifying-lawful-interception.md).

# Verifying lawful interception

> **Applies to:** Tmedia 3.0, 3.2, 3.3; SBC 3.1, 3.3

### Installing ruby 'gem'

The Lawful Intercept filter script requires the 'json' ruby gem.

TMedia units ([TMG800](https://telcobridges.com/media-gateways/products/tmedia-gateways/tmg800/), [TMG3200](https://telcobridges.com/media-gateways/products/tmedia-gateways/tmg3200/), [TMG7800](https://telcobridges.com/media-gateways/products/tmedia-gateways/tmg7800/)), provided by TelcoBridges, are now shipped with this 'gem' installed.

If you have older TMedia units, or if you are using your own host, verify that the host has the 'json' gem installed:

```
gem list --local
```

Output example:

```
- LOCAL GEMS ***

bundler (1.2.3)
fcgi (0.8.7)
json (1.7.7)    <---- json installed
```

If it is missing, it can be installed from a shell:

```
gem install json
```

### Allowing SFTP password-less connection

If your IRI server uses SFTP, TelcoBridges system must be enabled for [password-less](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/operations/password-less-ssh/README.md) connections.

**IMPORTANT:** The password-less SSH procedure must be executed on all units in a redundant Tmedia system:

**TMG3200 1+1 or TMG800 1+1 system**

The password-less procedure must be executed on both units

**TMG7800 system**

The password-less procedure must be executed on both TMG7800-CTRL units.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/verifying-lawful-interception.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.