ZyXEL Communications P-2302 User Manual

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Chapter 25 Troubleshooting
P-2302HWUDL-P1 Series User’s Guide
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If the problem continues, contact your ISP. 
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The Internet connection is slow or intermittent.
There might be a lot of traffic on the network. Try closing some programs that use the 
Internet, especially peer-to-peer applications. 
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).
Disconnect and re-connect the power adaptor to the ZyXEL Device.
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. 
• 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. 
25.4  Phone Calls and VoIP
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I cannot make telephone calls using the telephone that is connected to the 
ZyXEL Device. 
Check the telephone connections and telephone wire.
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.
If you are trying to make a PSTN call, make sure you are using the phone connected to 
the PHONE 1 port.
25.5  Problems With Multiple SIP Accounts 
You can set up two SIP accounts on your ZyXEL Device and your ZyXEL Device is equipped 
with two phone ports. By default your ZyXEL Device uses SIP account 1 with both phone 
ports for outgoing calls, and it uses SIP accounts 1 and 2 for incoming calls. With this setting, 
you always use SIP account 1 for your outgoing calls and you cannot distinguish which SIP 
account the calls are coming in through. If you want to control the use of different dialing 
plans for accounting purposes or other reasons, you need to configure your phone ports in 
order to control which SIP account you are using when placing or receiving calls.