D-Link DIR655 Router

The DIR-655 is a wireless router that requires a few small adjustments in order to ensure the best quality of service. Please follow the instructions below to prepare your DIR-655 for VoIP.
Firmware Reviewed: 1.21 HW:A | 1.31 HWA

Please Note: Hardware Version B does not have a SIP ALG option and has issues because this service cannot be turned off.

1. Navigate to the routers web interface. Usually this is http://192.168.0.1.

2. The Default Login Credentials are:

• Username: admin
• Password:

3. Select “Advanced.”

4. Select “Firewall Settings”.

5. Uncheck the “Enable SPI” box so that SPI is disabled.

6. Uncheck “SIP” from the Application Level Gateway Section so that SIP ALG is disabled.

Please review the screenshot below to assist in the process.