3com 4210 PWR 18-PORT User Manual

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 2: I

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WITCH

power required to the device, providing that the total power budget for the switch 
is not exceeded.

A PoE switch combines the functionality of a standard Ethernet switch with a 
single power supply that can power multiple devices. Using a PoE switch has the 
following advantages over an non-powered network.

■

Reduced Cabling — a PoE (802.3af) compliant device that has its power 
supplied over its Ethernet cable does not require a separate power supply. If, 
for example, you use the switch to connect a 3Com 11 Mbps Wireless LAN 
Access Point 8500 to the network, then only a network cable is required to 
provide both power and network connectivity. 

■

Increased Reliability — a device powered by a PoE switch can take advantage 
of the facilities available to the switch. You can fit the switch with a redundant 
power supply or uninterruptible power supply to increase its uptime. 

The switch supports resistor detection according to IEEE 802.3af and pre-standard 
detection methods.

The Switch 4210 supports 3Com 802.3af equipment. For the latest list of 
supported devices, refer to the product page on the 3Com web site at 
http://www.3com.com/

For additional information on Power over Ethernet, refer to the Power over 
Ethernet Configuration chapter in the Configuration Guide available on the 3Com 
Web site. Power over Ethernet management is available using the web interface or 
the command line interface (CLI).

A Console cable is an 8-core cable. One end of the cable is a crimped RJ-45 
connector for the connection to the Console port of the switch, and the other end 
is a DB-9 female connector for the connection to the serial port on the Console 
terminal, as shown in Figure 24. 

Figure 24   Console cable

Table 16   Console cable pinouts

1

RTS

2

DTR

3

TXD

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2