4452d530_able___FreeSWITCH___Confluence__Description
[ITU-T Q.850 Code] 7 [Enumeration] CALL_AWARDED_DELIVERED [Cause] call awarded, being delivered in an established channel [Q.850] [Description] 
This cause indicates that the user has been awarded the incoming call, and that the incoming call is being connected to a channel already established to that user for similar calls (e.g. packet-mode x.25 virtual calls).
Hangup Cause Code Table - FreeSWITCH - Confluence
Description