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NE40E-M2 V800R010C10SPC500 Installation Guide

This is NE40E-M2 V800R010C10SPC500 Installation Guide
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Grounding Specifications for Signal Cables

Grounding Specifications for Signal Cables

This section describes the grounding specifications for signal cables.

Table 5-4 lists the grounding specifications for signal cables.
Table 5-4 Grounding specifications for signal cables

No.

Description

1

If there are digital trunk lines that connect a transmission device directly or indirectly to the base station of a wireless communication device, install an E1 surge protector for the corresponding interfaces of the transmission device.

2

Equip cables laid outdoors with metal jackets, and ground both ends, or connect them to the protection ground bar in the equipment room. For cables inside the equipment room, install surge protection devices at the corresponding interfaces of the device. The PGND cable for the surge protection devices should be as short as possible.

3

Both ends of the external conductor of a coaxial cable and those of the shield layer of the shielded cable should have good electric contact with the metal shell of the device that they connect to.

4

The incoming and outgoing signal cables at a site and the idle wire pair inside the cables should be grounded for protection.

5

Tone & Data Access (TDA) cables must pass the main distribution frame (MDF) with a security unit when going out of an office or site. Its shield layer should be connected to the protection ground of the MDF. The MDF and cabinet must be connected to the same ground busbar.

6

Signal cables in a communication office or mobile station should not be routed overhead.

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Updated: 2019-01-02

Document ID: EDOC1100058424

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