Chapter 25 Troubleshooting
4If the problem continues, contact your ISP.
The Internet connection is slow or intermittent.
1There might be a lot of traffic on the network. Try closing some programs that use the Internet, especially
2Check 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).
3Disconnect and
4If 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.
25.4Phone Calls and VoIP
I cannot make telephone calls using the telephone that is connected to the ZyXEL Device.
1Check the telephone connections and telephone wire.
2Make sure you have the VoIP > SIP Settings screen properly configured. See Section 9.3.1 on page 134. The PHONE 1 or PHONE 2 LED should be on when the SIP line is properly registered.
3If you are trying to make a PSTN call, make sure you are using the phone connected to the PHONE 1 port.
25.5Problems 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.
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