---
title: "Add Analog Modem Interface"
slug: "add-analog-modem-interface"
updated: 2026-05-19T13:36:30Z
published: 2026-05-19T13:36:30Z
stale: true
---

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

# Add Analog Modem Interface

With the analog modem interface, administrators can configure an existing analog modem and required PPP connection details. A supported analog modem must be connected to the Nodegrid System.

1. Go to the *NETWORK::CONNECTIONS*page
2. Click **Add** (displays dialog)
3. Enter **Name**
4. On **Type** drop-down, select **Analog MODEM**(dialog changes)

![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678387634878.png)
5. Enter **Description**
6. If **Connect Automatically** checkbox is selected, connection is automatically established at startup
7. Select **Block Unsolicited Incoming Packets** checkbox (automatically blocks all inbound connections on the interface)
8. In *Analog MODEM / PPP Connection*menu, enter details:
  1. **Status** drop-down, select one (Enabled, Disabled)
  2. **Device Name**
  3. **Speed** drop-down, select one (9600, 19200, 38400, 57600, 115200)
  4. **PPP Dial-Out Phone Number**
  5. **Init Chat** (a specific AT init string, if required)
  6. **PPP Idle Timeout (sec)** (connection idle timeout after which the connection is automatically disconnected. 0 sec = connection is not automatically disconnected.)
9. In *PPP IPv4 Address*menu (select one), enter details:
  1. **No Address** radio button
  2. **Local Configuration** radio button (expands dialog). Enter **Local Address** and **Remote Address. Accept Configuration from**
  3. **Remote Peer** radio button
10. In *PPP IPv6 Address*menu (select one) enter details:
  - **No Address** radio button
  - **Local Configuration** radio button (expands dialog). Enter **Local Address (LL)** and **Remote Address (LL)**. ![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678387977301.png)
  - **Accept Configuration from Remote Peer** radio button
11. In *PPP Authentication*menu, select one:
  - **None** radio button
  - **Local System** radio button (displays menu). **Authentication Protocol** drop-down, select one (PAP, CHAP, EAP).

![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678388104270.png)
  - **Remote Peer** radio button (expands dialog). Enter **Remote Username** and **Remote Passphrase**. **![](https://cdn.document360.io/763c5fb1-b9af-4ccd-9ad6-cf28ae4cd5a3/Images/Documentation/image-1678388217595.png)**
12. Click **Save**.