求翻译：在通信机械室的通信机柜中安装一组2U高度的上架式光纤收发器机笼，内部最多可接18块光纤收发器板，每块光纤收发器板对应通信DDF架上的一对2M通道同轴电缆是什么意思？

Communication mechanical room in the communications cabinet to install a set of 2u height rack-mounted fiber optic transceiver cage, internal can be accessed by up to 18 fiber optic transceiver board, each fiber optic transceiver board corresponding communication ddf shelf 2m channel coaxial cable

In the communication of the mechanical room in the cabinet installation communicate a high level of group 2 on U rack fiber optic transceiver cage, up to 18 internal fiber transceiver board, each fiber transceiver for DDF communication on a coaxial cable to channel 2 M

Installs a group of 2U high on posture optical fiber transceiver machine cage in the correspondence equipment room correspondence cabinet, the interior are most may meet 18 optical fiber transceiver board, each optical fiber transceiver tablet couplet should correspond DDF a on pair of 2M channel co

Communications in the Cabinet of communication machine room install a 2U height cage last fiber-optic transceiver, internal up to 18 fiber optic transceiver panels, each optical transceiver corresponding communications DDF frame on a pair of 2M channel coaxial cable

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