If you are unable to find a satisfactory answer to your question in this FAQ, please look in our knowledgebase or contact customer support (support at didww dot com).
For support options, see http://www.didww.com/support/index.php.

DID Overview

1. What is a DID (Direct Inward Dialing) Number?
2. Why Would I Use a DID?
3. Why is a DID Sometimes Referred to as a Virtual Number or Virtual Private Number?
4. Can a DID be Used for Calling from a Standard Telephone to another Telephone?
5. What is PSTN (Regular Phone) Forwarding?

Purchasing a DID and the Costs of Usage

1. Who May Use the Service?
2. How Do I Select and Buy a DID?
3. Can I Pick any Number that I Want?
4. How Do I Pay for the DID?
5. How Much Does a DID Cost?
6. Do I Pay Per-Minute Charges?
7. Is There a Maximum Call Duration per DID?
8. Do I Have to Renew my DIDs Every Month?
9. How Can I Change the Payment Method?
10. Is there a Registration or Membership Fee for Using the DID World Wide Services?
11. How do I Change my Credit Card Information?
12. What Currencies Can I Purchase DIDWW's Services in?
13. How Long Does it Take for a DID to be Activated?
14. Is Porting of Numbers Permitted?
15. When Do I Pay the Setup Fee?

Coverage Offered by DID World Wide

1. In which Countries and Cities Does DID World Wide have Local Telephone Numbers?
2. What Should I Do if my Required Area Code is not Offered by DID World Wide?

Configuring a DID

1. To what Devices Can I Forward Calls?
2. How Do I Configure a DID to Forward Calls to a Selected Remote Device?
3. Can I Forward Calls from a DID to PSTN (a Regular Telephone Number) in any Country in the World?
4. Can I Forward Calls from a DID Number to Mobile Phone?
5. Can I Change the Forwarding Destination for a DID?
6. Can I Use 3rd Party SIP Services such as Callcentric.com, Sipgate.com or Phonegnome.com?
7. Can I Order Services Online?

Using a DID and Support

1. Can I Make Outgoing Calls From DID World Wide Virtual Number?
2. Can I Send SMS from a DID World Wide virtual Mobile Number?
3. Does DID World Wide Support Callback?
4. Can I Use DID World Wide Numbers for Receiving Faxes?
5. How Do I Get Support?

DIDs and Channels

1. What is a Channel?
2. How Many Channels are Included when I Buy a DID?
3. Why would I Need Multiple Channels per DID?
4. Can I Buy Additional Channels for my DIDs?
5. What is the Difference between Shared and Non-shared Channels?
6. What is the Cost of Additional Channels?

Features Offered by DID World Wide

1. What Additional Features are Supported?
2. Do I have Access to my Call Records?
3. Are the DID World Wide Services Compatible with Asterisk?
4. Does DID World Wide Support IAX?
5. Which Kind of Mapping Options Supported by DIDWW?

Resellers and API Usage

1. How Can I Become a Reseller of Local Numbers and Services Provided by DID World Wide?
2. Does DID World Wide has an API that I Can Integrate into my Website or Application?