This object controls whether CAS (Channel Associated Signaling) bits are transported to the other endpoint, and the MIB notes that in a switching application these bits are backhauled to the Call Agent via the xGCP-CAS protocol, with the default set to true only when the line signaling type is CAS. An administrator working with CAS-signaled trunks relies on this object to ensure the associated signaling bits accompany the voice path so the Call Agent can interpret call state correctly. For example, a connection on a line configured for CAS signaling would default to true for this object, ensuring signaling bits are backhauled rather than silently dropped.