This object describes the physical connector type available on the PXM card for attaching an external clock source, such as a specific coax or twisted-pair connector standard. An admin cares because it tells them, without physically inspecting the card, what cabling and connector hardware they need on hand before attempting to wire in an external timing reference. For example, an admin planning a timing upgrade would check this object remotely to confirm whether they need a BNC-style or terminal-block cable before dispatching a technician.