Zoom X5V User Manual page 81

Check that your VoIP service is properly configured.
If your service supports automatic configuration downloads,
go to the X5v's VoIP page to see if the X5v has received a
configuration download. If not, press the Download
Configuration Now button, or reboot the X5v.
If your service doesn't support automatic configuration
downloads, double-check all the settings for your account and
service provider on the VoIP page.
If none of the above helps, contact your VoIP service provider
When I try to make a VoIP call to another VoIP phone, the
call doesn't go through.
The person or persons you are calling may not be available. Try
again later. Or, if there is a chance you may have the wrong
number, go to the provider's web site and check the directory.
Check if the person you are trying to call uses the same VoIP
service as you. If not:
You will have to precede your call by dialing a code for that
person's VoIP service. Ask the person you are attempting to
call for the code, or check the service provider's web site for a
list.
In some cases, there may not be a way to make direct VoIP
calls from your service to people subscribing to another VoIP
service. Check the web site, or email your provider.
When I try to make a VoIP call to a standard PSTN number,
the call doesn't go through.
Make sure that:
You have signed up for PSTN service with your VoIP service
provider. Contact your provider's customer support
department if necessary.
Appendix D: Troubleshooting 81