Asterisk func CONNECTEDLINE

Connectedline is a name to describe the aspects of the common feature called RPID or remote party id. The idea is that a user can dial a number and the display on the users phone is updated during the call with the information about the called party. This is also described as reverse caller id. Regardless this feature has become complicated. The features in Asterisk 1.8 include sharing this calling information with many protocols and interfaces like DAHDI, IAX2, SIP, etc...

                                                                                                             
From the 1.8 CLI you can type "core show function connectedline" to get more information