Direct Inward System Access is used to provide access to "dial tone" from a call that originates outside the phone system. For a sales person that needs to place a sales call but doesn't want the caller-id of his/her cell phone to be displayed, the salesperson can call into the phone system, enter a code, and be dropped to a dial tone where the caller can dial out to any allowable phone number. Since the call was actually placed via the phone system, additional functionality like transferring the call to another extension is possible as the phone system is sitting between the caller and the person that was called.
exten => s,1,Answer
exten => s,2,DigitTimeout(5)
exten => s,3,ResponseTimeout(10)
exten => s,4,Authenticate(xxxx)
exten => s,5,DISA(no-password|from-internal)
changing xxxx for pin number
In our Digital Receptionist menu, add an option, preferably obscure like 8888 to point to custom and type the following line into the box: