Which of the following statements about copper wire access are wrong? (Multiple choice)

• A.The corridor distribution box belongs to the copper distribution network.
• B.The copper wire access consists of three parts: the central office access device, the copper wire distribution network and the user access terminal.
• C.The equipment room distribution frame does not belong to the copper distribution network.
• D.Twisted Pair is a signal transmission cable made of two or more pure copper wires insulated from each other.

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Which of the following are typical products for copper wire access? (Multiple choice)

• A.MSAN
• B.DSL terminal
• C.DSLAM
• D.OLT

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Regarding the MA5800 frame type equipment, the equipment installation environment quality standards, what are the correct statements? (Multiple Choice)

• A.No fire and anti-static measures are required in the equipment room.
• B.The AC protection ground of the AC power supply should be reliably connected to the AC protection ground. The GND grounding and PGND grounding provided by the customer must be connected to the same grounding body.
• C.Customer's PGND cable, GND cable of primary power supply, wire diameter and power supply mode of a 48V cable to PDF or distribution box, subject to engineering design documents and company shipments, to meet equipment operation and capacity expansion requirements.
• D.AC power supply related parameters are in line with the long-term safe operation of the equipment. The equipment room AC power system should have a lightning protection unit, and the lightning protection unit should be grounded reliably.

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How many fan modules does the E9000 support?

• A.14
• B.13
• C.10
• D.11

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Regarding the MA5800 uplink and downlink optical fiber, which of the following are the correct statements? (Multiple Choice)

• A.The uplink optical fiber type is LC
• B.The uplink optical fiber type is SC
• C.The downlink optical fiber type is SC
• D.The downlink optical fiber type is LC

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