ZyXEL Communications P-2302HWUDL-P1 Series User Manual

Chapter 25 Troubleshooting

P-2302HWUDL-P1 Series User’s Guide

4 If the problem continues, contact your ISP. 

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1 There might be a lot of traffic on the network. Try closing some programs that use the 

Internet, especially peer-to-peer applications. 

2 Check the signal strength. If the signal strength is low, try moving the ZyXEL Device 

closer to the AP if possible, and look around to see if there are any devices that might be 
interfering with the wireless network (for example, microwaves, other wireless 
networks, and so on).

3 Disconnect and re-connect the power adaptor to the ZyXEL Device.
4 If the problem continues, contact the network administrator or vendor, or try one of the 

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. 

• Check the settings for QoS. If it is disabled, you might consider activating it. If it is 

enabled, you might consider raising or lowering the priority for some applications. 

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1 Check the telephone connections and telephone wire.
2 Make sure you have the VoIP > SIP Settings screen properly configured. See 

. The PHONE 1 or PHONE 2 LED should be on when the SIP line is 

properly registered.

3 If you are trying to make a PSTN call, make sure you are using the phone connected to 

the PHONE 1 port.

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1 Disconnect the USB device.
2 Reboot the ZyXEL Device.