ZyXEL Communications V501-T1 - Manual (Page 231)

Chapter 17 Troubleshooting
V500 Series User’s Guide
231
17.5 Phone Calls and VoIP
V
I cannot make VoIP calls.
Ensure that your V500 is set up as shown in your Quick Start Guide and Section 2.2 on page
35 .
Look at the LCD screen. The tabs at the right hand side show details of the V500’s SIP
accounts. 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 V500’s SIP settings may be misconfigured. Check your SIP settings and re-enter
them if necessary (see Section 7.4 on page 116 for details).
2 If No Reg still displays, check your network settings (see Section 6.3 on page 78 ). If
they are not correct, change them using information supplied by your ISP or network
administrator (see
Section 7.3 on page 104 ). If this does not help, contact your ISP or
network administrator.
If a SIP account is registered, choose it (press the key next to its tab). Try to make the call. If
you still cannot call out, do the following.
1 Check your DNS (Domain Name Service) settings (see Section 6.3.2 on page 79 ).
• If you use a static IP address, see Section 7.3.2 on page 109 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 V500 does not get DNS server information automatically, check
the settings on any hardware to which the V500 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 V500 does not get DNS server information automatically, contact your ISP.
2 Check your DNS SRV settings for the SIP account you want to use (see Section 7.4.13
on page 134 ). If DNS SRV is turned off, turn it on.
3 Make sure that your V500 uses the voice codecs recommended by your VoIP service
provider (see Section 7.4.11 on page 132 ).
V
I can make some VoIP calls, but not others.
The V500’s DNS (Domain Name Service) settings may be misconfigured. See the suggestions
about DNS in the troubleshooting section for “
I cannot make VoIP calls. ”.
If this does not help, the phone of the person you are calling may be malfunctioning or
misconfigured.