Televes 769501, Руководство пользователя

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GPON ONT
3. General Specifications
3.1 Interfaces
3.1.1 GPON
The Refs. 769501-769502 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+
ONT Tx ONT 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 widt h
nm
1 1
SLM Laser – MIN SMSR
dB
30 30
ONT Rx ONT 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
Minimum sensitivity
dBm
-27 -30*
Minimum overload
dBm
-8 -8*
Upstream optical penalty
dB
0.5 0.5
Consecutive identical digit im-
munity
bit
>72 >72
Tolerance to reflected optical
power
dB
<10 <10
ONT Rx Video
Receiving wavelength
nm
1550-1560
Table 3-1: Optical interfaces specifications
* ONT RX= -8~-30 dBm (The ONT7-RGW sensitivity assumes the use of the optional RS (255,239) FEC capability of the G-PON TC layer with the current
class B+ ONU detector technology; The ONU overload is set at –8 dBm to be common with the class B+ value, even though in this application –10 dBm is
sufficient).