Cabletron Systems BRIM-T6 用户手册
B-1
APPENDIX B
MEDIA SPECIFICATIONS AND REQUIREMENTS
This Appendix provides information about cabling media (Fiber, STP,
UTP) used with the BRIM-T6.
UTP) used with the BRIM-T6.
B.1 FIBER OPTIC
Table B-1 defines total signal attenuation tolerances for both single-mode
and multimode fiber cabling. Both types of cabling have a typical constant
attenuation rate per km of fiber cable, and each connector on the cable
system contributes significant additional attenuation. Maximum drive
distances define maximum allowable cable length.
and multimode fiber cabling. Both types of cabling have a typical constant
attenuation rate per km of fiber cable, and each connector on the cable
system contributes significant additional attenuation. Maximum drive
distances define maximum allowable cable length.
NOTE: The attenuation values shown include the attenuation attributable
to cables, connectors, patch panels, and reflection losses due to impedance
mismatches in the segment.
to cables, connectors, patch panels, and reflection losses due to impedance
mismatches in the segment.
Table B-1. Signal Tolerances for Fiber Optic Cable
Cable Type
Total
Allowable
Attenuation
Allowable
Attenuation
Maximum
Drive Distance
Drive Distance
Multimode
50/125
µ
m
13.0 dB or less
2 km (2187.2 yards)
62.5/125
µ
m
16.0 dB or less
100/140
µ
m
19.0 dB or less
Typical Signal Attenuation Rate:
≤
2.5 dB/km.
Single-Mode
8/125-12/125
µ
m
10.0 dB or less
10 km (10936.0 yards).
Typical Signal Attenuation Rate:
≤
0.5 dB/km.