4.6.3 Wiring for RJ-45 Plug Used in HCS-3600 Series Economic Conference System
1. Wiring standard
While making Ethernet cables using twisted pair cables, we should adhere to ANSI/TIA/EIA-568A (T568A for short) and
ANSI/TIA/EIA-568B (T568B for short).
The 8 pins assignment in RJ-45 plug: The side with leaf spring faces down, while the side with metal reed faces up, the
connection sequence from left to right is shown as follows:
2. Wiring order of Twisted Pair Cable on diverse occasions
：
The Ethernet cable should have RJ45 plugs on both ends. There are two ways of wiring, one of which is
straigh-through cable, the other is cross-over cable. The straight-through cable actually refers to both ends of the
cable are wired with the T568A standard or with T568B standard, while the cross-over cable is wired one end with
the T568A standard and the other with the T568B standard.
In most cases, straight-through cable adapts the T568B wiring standard. In projects using Cat.3 UTP, Cat.5 UTP or
S-UTP Cat.5, the T568B standard is adhered to. In case Cat.5 UTP is used, the transmission rate can be as fast as
100 Mbps.
Applications and wirings:
Computer--Computer
：
Cross-over cable
Computer--Switcher
：
Straight-through cable
Exchanger--Switcher
：
Cross-over cable or straight-through cable
Note: If TAIDEN HCS-3600 System CMU is connected to PC via Ethernet cable, cross-over cable should be used. If the
connection is via Switcher or HUB, the communication can be achieved via either cross-over or straight-through
cables shown as follows:
3. Function of each pin (1-8) in RJ-45 plug (10BaseT/100BaseTX)
：
.
①
TX Data +
.
②
TX Data -
.
③
RX Data +
.
④
Unused
.
⑤
Unused
.
⑥
RX Data -
.
⑦
Unused
.
⑧
Unused
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