User's Manual

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Technical specifications
3 Technical specifications
3.1 Interfaces
3.1.1 GPON
The FiberGateway GPON G.984.x layer uses 1490nm downstream and 1310nm upstream optical
wavelengths, with 2.488Gbps downstream and 1.244Gbps upstream by using an SC/APC protected
optical connector
3.1.1.1 Optical Interfaces
Items Unit B+ C+
FiberGateway Tx FiberGateway Tx
Nominal bit rate
Mbps 1244.16 1244.16
Operating wavelength
nm 1260-1360 1260-1360
Line code
-- Scrambled NRZ Scrambled NRZ
Minimum ORL of ODN
dB >32 >32
Mean launched power MIN
dBm +0.5 +0.5
Mean launched power MAX
dBm +5 +5
Launched optical power without
input to the Tx
dBm
Less than Min
sensitivity -10
Less than Min
sensitivity -10
Maximum Tx Enable
16 16
Maximum Tx Disable
16 16
Extinction ratio
dB >8.2 >8.2
Tolerance to the Tx incident
light power
dB >-15 >-15
SLM Laser – MAX −20 dB width
nm 1 1
SLM Laser – MIN SMSR
dB 30 30
FiberGateway Rx FiberGateway Rx
Receiving bit rate
Mbps 2488.32 2488.32
Receiving wavelength
nm 1480-1500 1480-1500
Max reflectance of equipment,
measured at Rx wavelength
dB <-20 <-20