Appendix B: Troubleshooting
1. General
Q: Network indicator is not lit.
1. Check the network cable connection
2. Verify the network is working, you can ping an existing device on the network.
3. Power off VPON, wait at least 20 seconds, power on VPON and verify again.
Q: Bad video quality.
1. Raise the video quality setting.
2. Check video quality from cameras.
3. Adjust VGA color to be at least 65536 color.
4. Try adjusting 75 Ohm terminating resister.
Q: No video
1. Check video cable, connector, power of camera. Use a TV set to verify the functionality
of cameras.
2. Check the corresponding Q&A of each running mode of VPON for this problem.
Q: Cannot control PTZ camera
1. Check cable connection and power of the camera.
2. COM1 parameters are not correct, or not accommodate with the PTZ device.
3. ID of the PTZ camera is not set correctly.
4. Switch the power of both VPON and PTZ camera.
5. VPON do not support this type of PTZ camera.
1.2 Network Mode
Q: Cannot access VPON from browser.
1. Verify network cable is well connected to hub and the network is good.
2. Make sure you are using IP in the same subnet of VPON.
3. Clear the ARP list.
4. If you are running MS Proxy Client on your PC, and the IP assigned to VPON is not a
valid local IP on the network. Try to allocate a valid local IP to VPON or disable MS
Proxy Client from the Control Panel.
5. If you can ping the IP of VPON, disconnect VPON from network and ping this IP again.
If there is a response, then you have a duplicated IP address on the network.
6. Clear your browser’s cache and make browser to check if there is newer version of web
page at every visit.
7. If you still cannot access VPON, try disable proxy in your browser.
Q: You can access VPON in intranet, but failed to access it in internet.
1. Verify your intranet is connected to internet.
2. Verify if a valid public IP is assigned to VPON or a valid public IP is mapped to a valid
local IP assigned to VPON.