How to Configure Port Mapping on Telecom TEWA-500E Optical Modem

telecom optical modemport forwardingbridge modepublic IPTEWA-500E

Published·Mar 23, 2016Modified·Mar 23, 2016

Recently, Telecom offered a free promotion for optical modems and set-top boxes. I signed up for a 20M fiber plan, which offers significantly better stability and speed compared to my previous Aipu broadband. However, due to technical tinkering, I needed to use the port forwarding feature. I was using a Xiaomi Router Mini, but port forwarding settings on the router had no effect. Initially, I thought this feature was merely decorative, but online research revealed it was due to Telecom's restrictions. Below is a step-by-step guide on how to configure port mapping on the Telecom optical modem.

1. Switch to a Public IP

Call 10000 to ask customer service to check if your current fiber connection has a public IP or a private IP. If it is a private IP, request them to change it to a public IP and restart the optical modem for the changes to take effect.

2. Disable the Optical Modem's Wireless Function

The optical modem comes with built-in wireless functionality, but it is quite limited. For port mapping purposes, we need to disable this feature and rely on the router's wireless capabilities. Open a browser and go to http://192.168.1.1/ to log in using the account and password found on the back of the modem. Navigate to the "Network" tab, select "WLAN Settings," then choose "Wireless Advanced Settings" on the left. Uncheck "Enable Wireless Network" and click "OK." Note that my modem model is TEWA-500E; settings may vary slightly for different models.

3. Change the Optical Modem Access Mode

Visit the Telecom official website at http://www.189.cn/ and log in with your broadband account and password. Navigate to My Services -> Broadband Business Query -> Modify Router Bridging -> Change to Bridge Mode. Note: You must remember your broadband account and password, as you will need to use the router's PPPoE dialing method to access the internet after this change.\n Optical Modem Settings

4. Configure Router PPPoE Auto-Dial

After switching to bridge mode, the optical modem no longer has routing capabilities. Connect the optical modem's network port to the router's WAN port. The router will typically detect the new internet access method. Previously set to dynamic, it should now be PPPoE auto-dial. In the Xiaomi Router backend, go to Common Settings -> Internet Settings -> Connection Type PPPoE, enter your broadband account and password, and set it to auto-dial.

PPPoE Configuration

5. Port Mapping

Once the above steps are completed, port mapping should work without issues. Port forwarding settings vary by router model; you can search online for specific tutorials. To check your public IP, refer to this guide: How to Change Your External IP Address?. Additionally, note that the public IP may change after re-dialing, so consider using a DDNS (Dynamic Domain Name System) function. Search online for more details on DDNS.

Part of this content is referenced from: Changing Default Settings on Telecom Optical Modems. Thanks to the author for sharing.