Specifications

Chapter 1 Introduction Installation and Operation Manual
1-2 Overview FOM-E1/T1 Ver. 2.0
Features
Fiber Optic Interface
Table 1-1 provides information on the characteristics of the fiber optic interface
types supported by FOM-E1/T1 and FOM-E1/T1/R, including the maximum range
of a typical fiber optic cable. The maximum range values given assume a margin
of 3 dB.
Table 1-1. Fiber Optic Interface Types
Wavelength Fiber Type Transmitter
Type
Typical Power Receiver Sensitivity Connector Typical Max.
Range
[nm] [μm] [dBm] [dBm] [km] [mi]
850 62.5/125
multimode
VCSEL/LED
VCSEL
-18 (FOM-E1/T1/R)
-7 (FOM-E1/T1)
-35 (FOM-E1/T1/R)
-32 (FOM-E1/T1)
ST, SC, FC 4.8
6.7
3.0
4.2
1310* 62.5/125
multimode
LED -18 -31 ST, SC 9.3 5.7
1310 9/125 single
mode
Laser -12 -40 ST, SC, FC 50.0 31.0
1310* 9/125 single
mode
Laser (long
haul)
-2 -40 ST, SC, FC 70.0 43.4
1550 9/125 single
mode
Laser -12 -38 ST, SC, FC 92.0 57.0
1550* 9/125 single
mode
Laser (long
haul)
-1 -40 ST, SC, FC 144.0 89.4
1310/1550* 9/125 single
mode
Laser (WDM),
SF1
-12 -34 SC 38.0 23.6
1550/1310* 9/125 single
mode
Laser (WDM),
SF2
-12 -34 SC 38.0 23.6
1310* 9/125 single
mode
Laser (single
fiber), SF3
-12 -27 SC 20.0 12.4
Fiber optic interfaces that are marked with an asterisk (*) are for the FOM-E1/T1
standalone version only.
Typical attenuation for the fiber optic interface units is as follows:
• 3.5 dB/km for 62.5/125 μm multimode fiber sat 850 nm
• 1.5 dB/km for 62.5/125 μm multimode fiber sat 1310 nm
• 0.5 dB/km for 9/125 μm single mode at 1310 nm
• 0.25 dB/km for 9/125 μm single mode at 1550 nm
Note