O'Reilly logo

FreeSWITCH 1.6 Cookbook by Giovanni Maruzzelli, Michael S Collins, Anthony Minessale II

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Incoming DID (also known as DDI) calls

Phone calls coming in from the Public Switched Telephone Network (PSTN) are often called DID or DDI calls. DID stands for Direct Inward Dialing, while DDI means Direct Dial In; both acronyms refer to the same thing. DID numbers are delivered by your telephone service provider. They can be delivered over VoIP connections (such as a SIP trunk) or via traditional telephone circuits, such as PRI lines. These phone numbers are sometimes called DID numbers or external phone numbers.

Getting ready

Routing a call requires two pieces of information: the phone number being routed and a destination for that phone number. In our example, we will use a DID number 8005551212. Our destination will be user 1000. Replace these ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required