---
title: "Commissioning a DSL Router on a Line of Deutsche Telekom - icom OS Routers"
slug: "commissioning-a-dsl-router-on-a-line-of-deutsche-telekom-en"
updated: 2024-12-20T10:40:02Z
published: 2024-12-20T10:40:02Z
canonical: "docs.insys-icom.com/commissioning-a-dsl-router-on-a-line-of-deutsche-telekom-en"
---

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

# Commissioning a DSL Router on a Line of Deutsche Telekom - icom OS Routers

This Configuration Guide shows how to commission a DSL router with icom OS for operation on a DSL line of the provider Deutschen Telekom.

## Situation

You have a DSL router with icom OS and want to commission it on a Telekom DSL line, i.e. connect it to the Internet.

## Solution

We will use the Startup Wizard to configure the router for a DSL connection. The Startup Wizard will configure the router for basic operation and Internet (WAN) connectivity in just a few steps.

The following is prerequisite:

- The device is in factory settings
- A DSL modem is installed in slot 2
- The DSL port of the router is connected to your DSL line or the output of your DSL splitter

> [!NOTE]
> Please note!
> 
> The device can only be accessed via the first Ethernet socket in default settings. This avoids to bridge several networks accidentally on an already configured router when resetting to default settings.

### Commissioning using the Startup Wizard

1. Open the user interface of the router: [https://insys.icom](https://insys.icom)
2. Click *To Startup Wizard* on the startup screen under **Startup Wizard**.

> [!NOTE]
> Please note!
> 
> If the router is not in factory settings, the startup screen is not displayed; the Startup Wizard can then be started in the *Wizards* → *Startup Wizard* menu
3. Click in the Startup wizard on START . ![cg en m3 dsl via telekom 01](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_01.png)
4. If necessary, change the time and synchronisation settings and click on NEXT . ![cg en m3 dsl via telekom 02](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_02.png)
5. Enter the credentials required for authentication (or configure an *Authentication through certificates*) and click on NEXT . ![cg en m3 dsl via telekom 03](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_03.png)
6. Configure the DSL connection:

  - *Type of Internet connection*: DSL
  - *MTU*: **1492**
  - *ISP user name*: see [Composition of the user name](/kb/docs/en/commissioning-a-dsl-router-on-a-line-of-deutsche-telekom-en#composition-of-the-user-name)
  - *ISP password*: **personal password** in the welcome letter containing the credentials
  - *VLAN tag*: **7**
  - *VPI*: **1**
  - *VCI*: **32**
  - *Multiplex*: **LLC** ![cg en m3 dsl via telekom 04](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_04.png)
7. Click on NEXT .
8. Optional: configure a VPN connection and click on NEXT . ![cg en m3 dsl via telekom 05](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_05.png)
9. Optional: change the LAN connection settings and click NEXT . ![cg en m3 dsl via telekom 06](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_06.png)
10. Optional: upload a configuration for the icom Router Management to the router. ![cg en m3 dsl via telekom 07](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_07.png)
11. Click on RUN WIZARD.
12. Click on EXIT WIZARD after the configuration has been made by the startup wizard.

The startup wizard configures the router for the DSL connection. The establishment of the DSL connection can be observed in the ![view dashboard outline](https://docs.insys-icom.de/assets/icons/view-dashboard-outline.png) *Status* → *Dashboard* menu in the *DSL2* section. The **Showtime** status indicates that the DSL connection is established. ![cg en m3 dsl via telekom 08](https://docs.insys-icom.de/assets/cg_en_m3_dsl_via_telekom_08.png)

### Composition of the user name

You will get the credentials from your provider.

In the letter from Deutsche Telekom containing the credentials, you will find a *Zugangsnummer* (access number), a *Persönliches Kennwort* (personal password), a *Anschlusskennung* (connection ID) and a *Mitbenutzernummer* (co-user number).

The *ISP user name* is composed of *Anschlusskennung*, *Zugangsnummer* and *Mitbenutzernummer* as follows. **Depending on the length** of the *Zugangsnummer*, the composition **differs**:

- Example for a **12-digit** Zugangsnummer:

  - *Anschlusskennung*: 002123456789
  - *Zugangsnummer*: 551112345678
  - *Mitbenutzernummer*: 0001

The *ISP user name* to be configured in the router is composed as follows: *Anschlusskennung*+*Zugangsnummer*+*Mitbenutzernummer*+*@t-online.de* = `0021234567895511123456780001@t-online.de`

- Example for a **<12-digit** Zugangsnummer:

  - *Anschlusskennung*: 002123456789
  - *Zugangsnummer*: 0228181818
  - *Mitbenutzernummer*: 0001

The *ISP user name* to be configured in the router is composed as follows: *Anschlusskennung+Zugangsnummer+#Mitbenutzernummer+@t-online.de* = `0021234567890228181818#0001@t-online.de`

Also be aware of a possibly required VLAN tag; this is often not documented in the credentials; for the provider **Deutsche Telekom**, for example, it is **7**.

## Troubleshooting

- The status of the DSL connection as well as the WAN chain and their interfaces is displayed on the ![view dashboard outline](https://docs.insys-icom.de/assets/icons/view-dashboard-outline.png) *Status* → *Dashboard* page. If an interface does not achieve the **online** condition, its condition can also be examined on this page.
- If no network traffic is achieved, the tools integrated in the router can be used for debugging.
- The required setting for the *VLAN tag* (often also referred to as VLAN ID) is often not provided with the credentials by many providers. Telekom and various other providers use **7**. If in doubt, ask your provider for the necessary setting.
- The MTU (Maximum Transmission Unit) value proposed by Telekom is **1492**. The router is configured to an *MTU* of **1452** in factory settings. If this value causes connection problems, you can adjust the *MTU* in the *Network* → *Interfaces* menu. To do this, click on in the DSL interface line in the *DSL* section and then click on *to extended view*.

Standard IP address: https://192.168.1.1; login depending on configuration; default for earlier firmware versions: *User name*: **insys**, *Password*: **icom**