Phone Calls And Voip - ZyXEL Communications V300-T1 User Manual

Chapter 16 Troubleshooting
The Internet connection is slow or intermittent.
1 There might be a lot of traffic on the network. Check
is sending or receiving a lot of information, 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 V300 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 Reboot the V300.
4 If the problem continues, contact the network administrator or vendor, or try one of the
advanced suggestions.

16.3 Phone Calls and VoIP

I cannot make VoIP calls.
Ensure that your V300 is set up as shown in your Quick Start Guide and
29.
Look at the LCD screen. If a SIP account is registered, its name appears here. If a SIP account
is not registered, No Reg displays.
If no SIP account is registered, do the following.
1 The V300's SIP settings may be misconfigured. Check your SIP settings and re-enter
them if necessary (see
2 If No Reg still displays, check your network settings (see
they are not correct, change them using information supplied by your ISP or network
administrator. If this does not help, contact your ISP or network administrator.
If a SIP account is registered, try to make the call. If you still cannot call out, do the following.
1 Check your DNS (Domain Name Service) settings (see
• If you use a static IP address, see
settings.
• If you use a dynamic IP address (DHCP) your DNS settings are controlled by the
DHCP server. The DHCP server may belong to your service provider, or it may be on
your network. If your V300 does not get DNS server information automatically, check
the settings on any hardware to which the V300 is connected, or contact your ISP or
network administrator.
• If you use PPPoE, your DNS settings are controlled by your Internet Service Provider.
If your V300 does not get DNS server information automatically, contact your ISP.
124
Section 6.2 on page 49 for details).
Section 6.4 on page 56
Section 2.1 on page 29. If the V300
Section 2.1 on page
Section 5.4 on page
Section 5.4 on page 46).
for how to change DNS
V300 User's Guide
46). If