
Chapter 22 Troubleshooting
P-661H/HW Series User’s Guide
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4 Disconnect all the cables from your device, and follow the directions in the Quick Start
Guide again.
5 If the problem continues, contact your ISP.
V I cannot access the Internet anymore. I had access to the Internet (with the
ZyXEL Device), but my Internet connection is not available anymore.
1 Check the hardware connections, and make sure the LEDs are behaving as expected. See
the Quick Start Guide and Section 1.5 on page 35.
2 Reboot the ZyXEL Device.
3 If the problem continues, contact your ISP.
V The Internet connection is slow or intermittent.
1 There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.5
on page 35. If the ZyXEL Device is sending or receiving a lot of information, try closing
some programs that use the Internet, especially peer-to-peer applications.
2 Reboot the ZyXEL Device.
3 If the problem continues, contact the network administrator or vendor, or try one of the
advanced suggestions.
Advanced Suggestions
• Check the settings for bandwidth management. If it is disabled, you might consider
activating it. If it is enabled, you might consider changing the allocations.
22.4 Wireless Router/AP Troubleshooting
V I cannot access the ZyXEL Device or ping any computer from the WLAN.
1 Make sure the wireless LAN is enabled on the ZyXEL Device
2 Make sure the wireless adapter on the wireless station is working properly.
3 Make sure the wireless adapter (installed on your computer) is IEEE 802.11 compatible
and supports the same wireless standard as the ZyXEL Device.
4 Make sure your computer (with a wireless adapter installed) is within the transmission
range of the ZyXEL Device.
5 Check that both the ZyXEL Device and your wireless station are using the same wireless
and wireless security settings.
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