Tellabs RFI-Hardened Wallmount Racks (Apparatus Case). PN 89-0692 Rev A, Peace Shield Designation T001-2 Ext Dims: 22" W x 18" H x 13 5/8" D Int Dims: 19" W x 14" H x 12" D These racks are double-hinged, allowing access to the front and rear of mounted equipment.