求翻译：中低端交换机招标，第一标段：具备全GE端口的盒式三层交换机；第二标段：盒式三层交换机；第三标段：盒式二层交换机；第四标段：具备PoE功能的盒式交换机。是什么意思？

 low-end switch tender, the first tenders: GE port box with all three switches; the second section: three-layer switch box; third tenders: floor switch box; fourth tenders: cassette switch with PoE functionality.

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 low and middle-end switchboard tender, first sign section: Has the entire GE port box type three switchboards; Second sign section: Box type three switchboards; Third sign section: Box type two switchboards; Fourth sign section: Has the PoE function box type switchboard.

Low-end switches in the tender, the first section: featuring full box layer-three switch for GE ports; the second tender section: box layer-three switch; the third sign section: layer two switch cartridges; section IV: cartridge switch with PoE capabilities.