Out of the box these routers come pre-installed with stock Netgear firmware. In order for these devices to be compatible they must be flashed with open source DD-WRT firmware. Flashing the router with open source DD-WRT firmware allows granular customization and configuration options to prevent VoIP-related issues such as registration issues, call failures, and quality of service issues.
Intermedia customers have a long track record of success with flashed open source DD-WRT devices.
Before proceeding with the steps below the initial setup of the router will need to have been completed, along with confirming Internet access.
Important: Before flashing the router the hardware version of the device needs to be verified. This article goes over the flashing process for the v2 hardware version. You can find the hardware version on the main Netgear dashboard of the web interface.
- Download the DD-WRT firmware .chk file. The file can be downloaded here
- In the Netgear's web interface navigate to Advanced > Administration > Router Update
- Select Browse and locate the .chk file that was previously downloaded. Select Open
- Click Upload and then click OK
- You may get a warning about the firmware version, select Yes to proceed
- The router will then begin to update its firmware. Important: Do not power off or unplug the router while the firmware is updating, as this could brick the device.
- The router should reboot after the firmware update. If you aren't automatically taken to the DD-WRT dashboard close and re-open your browser. Navigate to 192.168.1.1
- For router configuration refer to the DD-WRT KB article located here
If flashed successfully, the router's main web interface dashboard should look like the screenshot below.