Cabletron Systems 38 User's Guide download pdf (Page 25)

EMC38-12 USER’S GUIDE Page A-1

APPENDIX A

CABLE REQUIREMENTS

This appendix provides cable requirements for each of the EMC38-12

ports.

A.1 10Base-T TWISTED PAIR REQUIREMENTS

When you connect a 10Base-T twisted pair segment to the EMC38-12,

the device at the other end of the twisted pair segment must meet IEEE

802.3 10Base-T speciﬁcations. Your 10Base-T twisted pair segment must

meet the following requirements.

Segment Length

The IEEE 802.3 10Base-T standard requires that 10Base-T devices must

be able to transmit from 0 to at least 100 meters (328 feet) per segment of

24-gauge unshielded twisted pair (UTP) cable.

Insertion Loss

The maximum insertion loss allowed for a 10Base-T segment is 11.5 db

at all frequencies between 5.0 and 10.0 MHz. This includes the

attenuation of the cable, connectors, and patch panel.

Impedance

10Base-T speciﬁes cable impedance between 85 and 110 ohms.

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Cabletron Systems 38 User's Guide Page 25