# 2N IP Intercom Integration Guide

Cloud Voice works with 2N IP intercoms so a door station at your entrance becomes a full SIP endpoint on your phone system. (SIP, Session Initiation Protocol, is the standard Cloud Voice uses to set up and tear down calls, so an SIP endpoint is any device the phone system can call and be called by.) Once integrated, a visitor pressing the call button rings your extensions, you can see and speak with them, and you can unlock the door without leaving your desk. This page introduces what the integration delivers, how the call flow works, which devices are supported, and the order in which to set everything up.

## What the integration gives you

Pairing a 2N IP intercom with Cloud Voice unlocks the following capabilities.

**Two-way video with the person at the door.** Beyond audio, the door station can carry live video to whichever endpoint answers, including:

- An indoor station
- The Cloud Voice App
- A video-capable IP phone

**Ring several devices at once, and open the door from any of them.** Apply a Ring Strategy to the extension the intercom calls so a visitor's call reaches the Cloud Voice App and other extension endpoints simultaneously. Whether you're at your desk or away, you can pick up and release the door from whichever device is closest.

**Never miss a visitor by forwarding calls onward.** Add Call Forwarding to the extension to send intercom calls to another destination, such as an external mobile number, when you're unavailable. This makes remote access control straightforward even when no one is on site.

## How the call flow works

In this setup the 2N IP intercom acts as the door station, and the Cloud Voice App on your extensions acts as the indoor station. The sequence runs like this:

1. A visitor presses the call button on the intercom.
2. The intercom places a video SIP call through Cloud Voice to the extension (or extensions) you designated.
3. An extension user answers, talks to the visitor over two-way audio, and watches the live video feed.
4. Once satisfied, the user enters a predefined switch code to unlock the door remotely.

![Cloud Voice, a door station video call reaching an indoor endpoint during a visitor request](/images/pbx/pce-video-preview.png)

:::note
This guide uses the Cloud Voice App as the indoor station for illustration, but any SIP-compliant endpoint works the same way. An IP phone registered to the indoor receiver's extension can just as easily take the call and run the door-release step.
:::

## Supported 2N intercom models

The integration has been validated against the following 2N IP intercom models:

- 2N IP Base
- 2N IP Force
- 2N IP One
- 2N IP Solo
- 2N IP Style
- 2N IP Verso

## Tested versions

The configuration in this guide was verified with the following combination.

| Device | Firmware version | IP address / domain |
| --- | --- | --- |
| Cloud Voice | 84.21.0.16 | pbx.example.com |
| 2N IP Solo | 2.46.0.70.3 | 192.168.28.48 |

## Set-up steps

Complete the integration in three stages, in order.

1. **Prepare the extensions and network.** Create the extensions the intercom will use on Cloud Voice, and give the intercom device network connectivity so you can reach its web interface for the remaining configuration. See [2N IP Intercom Integration Preparation](/pbx/integrations/2n-intercom/2n-ip-intercom-integration-preparation/).

2. **Register the intercom to a Cloud Voice extension.** Point the intercom at a PBX extension so it can place and receive calls through Cloud Voice when the button is pressed. See [Register 2N IP Intercom with a Cloud Voice Extension](/pbx/integrations/2n-intercom/register-2n-ip-intercom-with-cloud-voice/).

3. **Configure calling and door release on the intercom.** Set the intercom's dialing behavior, its switch code, and its audio prompts so it automatically calls the right extensions on a button press, unlocks the door when it receives the matching DTMF code, and plays your chosen prompt when the door opens. DTMF (Dual-Tone Multi-Frequency) is the tone a phone sends when you press a keypad key, so the switch code is simply the sequence of keys an answering user presses to release the door. See [Configure Call and Door Release for PBX Extensions on the Intercom](/pbx/integrations/2n-intercom/configure-call-and-door-release-for-pbx-extensions-on-the-intercom/).

:::caution
The switch code unlocks a physical door, so treat it like a key. Choose a code that is hard to guess, avoid writing it down where visitors can see it, and change it if someone with access to it leaves. Anyone who can send that DTMF sequence to the intercom can open the door.
:::