3com 3CNJPSE24 Manuel d'utilisateur télécharger pdf (Page 11)

Introduction to the Ethernet Power Supply

Ethernet Power Supply User s Guide 1-3

Ethernet Power Supply Front View Detail

Figure 1 Ethernet Power Supply Front View

10/100BASE-TX Data & Power Output Ports, Upper 24 Ports

The Ethernet Power Supply has 24 Data & Power ports

configured as Media Dependent Interface (MDI) non-crossover.

These ports are designed to carry Ethernet data over the

standard 2-wire pairs (RJ-45 pins 1/2 and 3/6) and DC power

source over the spare wire pair (RJ-45 pins 4/5 and 7/8).

10/100BASE-TX Data Input Ports, Lower 24 Ports

The Ethernet Power Supply has 24 10BASE-T/100BASE-TX-

data input ports, configured as MDI non-crossover. These ports

are designed to carry Ethernet Data only (TX/RX) over the

standard 2-wire pairs (RJ-45 pins 1/2 and 3/6).

According to the IEEE 802.3 standard, the maximum allowable

distance between two Ethernet links is 100m (328ft). The

Ethernet Power Supply meets this IEEE 802.3 requirement.

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3com 3CNJPSE24 Manuel d'utilisateur Page 11