Connecting ADSL2+ Modem Router to Wireless DSL Gateway

By nick_bell79 ·
I am having trouble connecting my Wireless Gateway to my ADSL2+ Modem Router.

The Modem Router is a Netcomm NB5 ADSL2+ Modem Router(IP:
The Wireless Gateway is a 3Com OfficeConnect Wireless 11g Cable/DSL Gateway (IP:

I suspect it is something to do with the DHCP Settings. On both the Netcomm and 3Com devices they currently both act as a DHCP Server.

Which one should be and how should I configure their IP Addresses?

How do I set the 3Com as the default gateway?

Any suggestions would be greatly appreciated. Thanks


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Only one DHCP server

by Toivo Talikka In reply to Connecting ADSL2+ Modem R ...

Do you have the NB5 Quick Start Guide? The NB5 ADSL modem is in the bridge mode by default, therefore it relies on the SMC device acting as the router.

The user manual does not say if the DHCP server function is turned off in the bridge mode, therefore it is best to follow the instructions in the NB5 User Guide which can download from Netcomm's website. Access the administrative interface, Go to the Advanced Settings - LAN Setup - DHCP Configuration on page 50 and select the option 'Server and Relay Off'.

You can check if your NB5 ADSL modem has connected and logged in to the ISP by selecting Status - Connection Status from the main menu.

The default IP address in the 3Com router is also, which you will need to change to avoid a conflict with the NB5. The device comes with a Gateway CD from which you can the Gateway Discovery application, which may help.

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