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Introduction

In software 2.xx it is possible to install a DECT base station in a different subnet. 

To get this working, you first need to be sure that your DECT base-stations are updated with the firmware that supports this feature. For this you can first install the base-station in the same subnet, let the Integrator/Manager update your base-station and then place in the other subnet.

The following changes are made to support this feature.

  1. By default a DECT base is now pre-configured to use DHCP
  2. The DECT manager joins a pre-configured multicast-group (i.e. listens to multicast-traffic)
  3. When base in different subnet gets IP from DHCP it is now capable to send its "Discover" also to the multicast-group.
  4. When those multicast packages are routed to the other subnet, the base can be "seen" as usual in the WEB-UI and can be accepted/configured.


The switch/router MUST be configured to forward those multicast messages between the different subnets. As we are not the experts for your used switches, you need to configure this yourself, we can not support you but only document examples we received from our customers.

Technical information

Wireshark

You can use wireshark to trace if the multicast message are forwarded to the subnet, the DECT manager is installed. To see the multicast messages in wireshark, you can use the filter "ip.addr>=224.0.0.0". 


Netgear GSM7224P

We used the Netgear switch (GSM7224P ProSafe 24-port Gigabit L2+ Managed Switch with PoE+, 10.0.2.35, B1.0.1.1) and we configured.

  • VLAN's (Subnets)
  • Made sure that IP routing is working, both devices in the different subnet can ping each other
  • Enabled DHCP server for both Subnets but this can also be an external DHCP server
  • Nothing more

Install the DECT manager in subnet A and DECT base in subnet B and it worked immediate.

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