GE MultiLink ML600 Instruction Manual page 26

OPERATION
Module Speed
B2, B3 100 Mb FX
B4 100 Mb FX
4–4
Cable size
62.5 / 125 μm
50 / 125 μm
100 / 140 μm
9 / 125 μm
The data in Power budget values for various modules on page 4–4 has been collected to
provide guidance to network designers and installers.
The use of either multi-mode or single-mode fiber to operate at 100 Mbps speed over long
distances (i.e., in excess of 400 m) can be achieved only if the following are applied:
1. The 100 Mb fiber segment must operate in full-duplex (FDX) mode (i.e. the full-
duplex (factory default).
2. The worst-case OPB of the fiber link must be greater than the fiber cable's
passive attenuation, where attenuation is the sum of cable loss, LED aging
loss, insertion loss, and safety factor.
Table 4–2: Power budget values for various modules
Mode fdx (hdx) λ
multi 2 (0.4) km 1300 nm 62.5/125 μm
single 18+ (0.4) km 1300 nm
MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL
Table 4–1: Cable losses
Mode
multi-mode
multi-mode
multi-mode
single-mode
Size P P
T R
-20 dB- -31 dB
50/125 μm 23.5 dB -31 dB
9/125 μm -15 dB -31 dB
CHAPTER 4: OPERATION
Cable loss
2.8 dB/km
2.8 dB/km
3.3 dB/km
0.5 dB/km
0.4 dB/km (LXSC25)
0.25 dB/km (LXSC40)
0.2 dB/km (LXSC70)
OPB d OPB
worst worst typ
9.0 dB 3.0 km 14 dB
5.5 dB 2.0 km 12 dB
14 dB 28 km 17.5 dB
d
typical
5 km
4 km
35 km