Do I need to buy a domain name first? my web site is still building and not bought yet .
my wed site URL is not funtioning for this moment so I couldn't apply to you , it was failed.
https://beta.charitycommission.gov.uk/charity-details/?regid=1160584&subid=0
how to proceed?
Once you have a Voice site, you can certainly use your own domain name with it if you wish to. There are some details of how to do this here:
http://cambridgeopensystems.com/documentation/community/domain-name/
Thanks
Joe