This Counter32, keyed by the ATM link index, counts F4 flow end-to-end OAM cells — the standard ITU-T ATM virtual-path-level OAM cells exchanged across the full end-to-end path rather than just one segment — with the source DESCRIPTION left blank so the meaning follows the standard ATM F4 OAM flow implied by the object name. Admins use this counter to verify VP-level end-to-end continuity monitoring is functioning across the whole path, distinct from segment-only monitoring tracked by f4SegCells. For example, an admin troubleshooting an end-to-end VP alarm would check whether this counter is incrementing to confirm end-to-end F4 OAM cells are actually being exchanged with the far end.