3com 860 User Manual

Ethernet Interface

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Conforms to IEEE 802.3 and Ethernet II standards.

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Twisted pair (10BaseT or 100BaseTx) connection. 

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Thick coax (10Base5) and thin coax (10Base2) connections require adapters; contact 
your dealer to obtain adapters, cables, and terminators. 

To avoid damaging the Ethernet interface, turn off the printer before making any 
Ethernet connections.

Ethernet Connections and Indicators

 

RCV (receive) indicator (green); blinks while the interface is receiving.

XMT (transmit) indicator (yellow); blinks while the interface is transmitting.

Twisted pair (10BaseT) connector. 

Ethernet Cables

100BaseTx requires Category 5 (100-Ohm UTP) cabling.

To fully comply with EMI (electromagnetic interference) specifications, the use of 
shielded or screened cables may be required. “Shielded” describes IBM-defined cables 
used with the DB-9 connector. “Screened” describes cables that are electrically similar to 
Category 4 UTP (Unshielded Twisted Pair), but with an added shield or screen.

Do not use “silver satin” telephone extension cables for 10BaseT networks, either 
as drop cords or as patch cables in the wiring closet. (Silver satin cables are flat, 
usually silver or gray, with 28-gauge stranded or tinsel conductors.) Do not use 
shielded twisted pair cable intended for IBM Token Ring networks or voice-grade 
(level 1 or 2) unshielded twisted pair cables. These cables do not meet the 
requirements for 10BaseT and will lead to unreliable operation. 

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