H137500: 3545 & 3546 CD ROM TRAY OPTION AND FRU PART NUMBERS. TEXT: A CD tray is required for the 3545 Dock I and 3546 Dock II, when a CD option is installed in either docking station. If a new CD option is being installed an option tray must be ordered. The IBM tray option numbers are as follows for US, EMEA, and Japan: US-39H3987, EMEA-39H3988, Japan-39H3989. The CD tray FRU P/N73H8591 can only be used to replace a broken part. NOTE: Option parts can not be ordered by IBM or TSS servicers, Options must be ordered by the system owner.