ZyXEL Communications Corporation V630 Benutzerhandbuch

Chapter 17 Troubleshooting

V630 User’s Guide

V

I cannot make calls.

Ensure that your V630 is set up as shown in your Quick Start Guide.

Look at the LCD screen. You should see the signal strength icon.If a SIP account is registered, 
the name of its profile appears in the main screen. If a SIP account is not registered, No SIP 
Service displays.

If no SIP account is registered, do the following.

1 The V630’s SIP settings may be misconfigured. Check your SIP settings and re-enter 

them if necessary (see 

2 If No SIP Service still displays, check your network settings (see 

). If 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 a 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 

 for how to change DNS 

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 V630 does not get DNS server information automatically, check 
the settings on the AP to which the V630 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 V630 does not get DNS server information automatically, contact your ISP.

2 Make sure that your V630 uses the voice codecs that the callee’s device supports.

V

I can make some calls, but not others.

The V630’s DNS (Domain Name Service) settings may be misconfigured. See the suggestions 
about DNS in the troubleshooting section for “

”.

If this does not help, the phone of the person you are calling may be malfunctioning or 
misconfigured.

V

My phone service works for a while and then cuts off and the V630 has to re-
register.