Huahuan Electronics H20RN-2000.V2 Series, Hardware Description

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Hardware Description
H20RN - 2000.V2 Series Platforms 2 Architecture and Introduction
Version 1.3(Oct.2019)
Beijing Huahuan Electronics Co., Ltd.
17
2.3.3 Ethernet Cable
Introduction
⚫
Used to connect the Ethernet electrical interface with other devices.
⚫
Used to connect the Ethernet monitoring interface on NM card with
network interface on NM PC machine.
The Ethernet interfaces on the H20RN - 2000.V2 series platforms are self - adaptive to
straight - through cable mode and crossover cable mode. Both of them can be used to connect
Ethernet electrical interface.
Appearance and Structure
Figure 2 - 11 shows the Ethernet cable.
Figure 2-11 Ethernet cable
PIN 1 PIN 8
PIN 8
PIN 1
Connector 1 Connector 2
Pin Assignments
Ethernet cables are classified into straight - through cables and crossover cables:
⚫
Straight through cable: EIA/TIA 568B standard line orders are used at
both RJ45 connectors crimped twisted pairs.
⚫
Crossover cable: EIA/TIA 568A standard line order is used at one
RJ45 connector crimped twisted pairs, while EIA/TIA 568B standard
line order is used at the other end.
Table 2 - 14 lists the line orders of EIA/TIA 568A and EIA/TIA 568B standards.