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FiberGateway User Manual
33
General Specifications
3 General 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
Table 3: Optical interfaces specifications
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
Bit error ratio
--
<-10
-10
<-10
-10
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