How to set up a Snom M500 in a dual-cell configuration

Updated at July 21st, 2025

This article describes setting up M500 base stations in a dual-cell configuration. In a dual-cell configuration, two M500 base stations are used. One is a primary base station, and the other is a secondary one.

Connecting the M500 base stations

Facility without network infrastructure

  1. To establish a data link, plug one end of an Ethernet (network) cable into the RJ45 connector labelled "NET" on the primary base station and the other into the network side. 
  2. Plug an Ethernet (network) cable into the RJ45 connector labelled "MULTI-CELL" on the primary base station, and plug the other end into the RJ45 connector labelled "NET" on the secondary base station.

 

Facility with network infrastructure

  1. To establish a data link, plug one end of an Ethernet (network) cable into the RJ45 connector labelled "NET" on the primary base station and the other into a network switch. 
  2. To establish a data link, plug an Ethernet (network) cable into the RJ45 connector labelled "NET" on the secondary base station and the other end into a network switch.

Configuring the M500 base stations to dual-cell mode

You can configure the base stations via WebUI, Provisioning, or the LINK button. 

WebUI

  1. Open a Web browser. In the address bar, enter the IP Address of the primary base station.

To find the IP address of the primary base station

On a handset/deskset registered to the M500, select Settings Status NetworkIPv4 or IPv6, and scroll down to IP address. Open a Web browser and enter this IP address in the address bar. In the left sidebar, click Status, and then click Base Status. Under the Mode column, look for "Primary". This identifies the primary base station. The IP column shows the IP address.

If no handsets/desk sets are registered to the M500, you must look up the IP address from your router that is connected to it.

  1. On the System → Base Preferences page, click the Mode list and select "Primary".

  1. Open a Web browser. In the address bar, enter the IP address of the secondary base station.
     
  1. On the System → Base Preferences page, click the Mode list and select "Secondary".

Provisioning

Import the following setting value to the primary base station via provisioning. 

multicell.role = primary

Import the following setting value to the secondary base station(s) via provisioning. 

multicell.role = secondary
  • Select the sub-menu option "Change operating mode to Primary" to configure the primary base station.
  • Select the sub-menu option "Change the operating mode to Secondary" to configure the secondary base station.

Checking the Site-wide Base Status

You can check the status of the base station(s) via the WebUI or by exporting the configuration file. The M500 SIP LEDs also indicate the base status. 

WebUI

  1. Open a Web browser. In the address bar, enter the IP address of any base station in your dual-cell configuration. 
     

Open the Status → Base Status page. 
The table provides a site-wide base listing. The primary base will always be listed as Base 1. All joined secondary bases will form the rest of the list. Use the IP and MAC columns to identify the base device.
 

Provisioning

  1. Export the configuration file of the primary base station (WebUI: Servicing → Provisioning → Export Configuration → Export button).
  2. Examine the values of the settings listed below. 
    "x" = 1 will list the primary base, and "x" starting from 2 will list all secondary bases, as each secondary base joins the primary base as part of the site. 
multicell.device.1.ip = 10.91.20.11
multicell.device.1.mac = 000413BB02E0
multicell.device.2.ip = 10.91.20.109
multicell.device.2.mac = 000413BB04C7

M500 LEDs

On the M500 base station, the (SIP) LED indicates the base status:

  • Steady green = Primary or Single cell base station
  • Slow flash red = Primary or Single cell base station
  • Steady orange = Secondary base station
  • Slow flash orange = Secondary base station




 

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