D-Link DGS-6604 — руководство по установке управляемого коммутатора Ethernet [59/111]

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DGS-6600 Layer 3 Chassis Ethernet Managed Switch Hardware Installation Guide

The power cables that the Switch uses must ensure normal operation. Before connecting any cables to the

Switch, carefully read the precautions in the next few pages.

EMI Considerations

The system can be affected by various sources of interference. Interference can affect the system in several

conductive ways, including capacitive coupling, inductive coupling, and electromagnetic radiation.

The two types of electromagnetic interference are conductive interference and radiated interference. The type of

electromagnetic interference will vary depending on the type of propagation path.

Radiated interference refers to the energy, usually RF energy, that arrives at a sensitive component through the

air. The source of the interference can either be from the system that is affected by interference or from a

different unit. The electromagnetic wire or signal cable connections between the source and sensitive

components can cause conducted interference results. A cable that is affected by interference can conduct

interference to other units in the network. The power supply unit of equipment is most often affected by

conductive interference. A filter can be used to control interference problems. However, signal paths in the

equipment may be affected by radiated interference, making it difficult to shield against.

1. In order to prevent interference from the power grid, effective measures should be taken against conductive

interference within units the power system.

2. The grounding device of the power equipment or the anti-lightning grounding device should ideally be

located as far away as possible from the working ground of the router.

3. Ensure that high-frequency large-current devices, high-power radio transmitters, and radar transmitting

stations are kept away from the Switch.

4. Take appropriate measures to isolate static electricity.

Precautions for Fiber Connections

Ensure that the cables used with the Switch are of the correct optical connector type and that the fiber type

matches the optical interface type used. You should also be aware of the Tx and Rx directions of the fiber. The Tx

side of the Switch should connect to the Rx side of the switch at the remote end and the same vice versa. Also

note that only class 1 Optical Transceivers can be plugged into the SFP ports of the DGS-6600 series Modules

supporting SFP ports.

Installation Tool Requirements

The tools needed to install the switch are described in Table 2-1.:

Table 2-4 Required Installation Tools

Common Tools Cross-head screwdriver, flat-head screwdriver, required electrical and

optical cables

Bolts, diagonal pliers, straps

Special-purpose Tools Anti-static tool

Meters Multimeter