Cabletron Systems EMC38-12 사용자 설명서
EMC38-12 USER’S GUIDE
Page A-1
APPENDIX A
CABLE REQUIREMENTS
This appendix provides cable requirements for each of the EMC38-12
ports.
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.
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.
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.
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.