Our technical knowledgebase includes documentation on how to configure Asterisk@Home and Trixbox for DID usage (How to Set Asterisk@Home/TrixBox with DIDWW DID Numbers?), as well as general configuration information on how to map DIDs to SIP extensions (sip.conf) (How to Set Asterisk@Home/TrixBox with DIDWW DID Numbers?) and how to set up an IAX configuration file (IAX.conf) (How to Configure IAX with DIDWW IP Addresses?).
Please find more information about DIDWW Configuration Scripts

Are the DID World Wide services compatible with Asterisk?