Televes OLT 769401, Руководство пользователя

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Table 3-5: GPON Interfaces Specification
** OLT RX= -12 ~-32 dBm (The OLT sensitivity assumes the use of the optional RS (255,239) FEC capability of the G-PON TC layer, as well as intrinsic
detector technology improvements)
3.3.4 B+ Link Budget
This budget covers all optical components between the extended OLT and ONU, including non-integrated WDM filters for the multiplex of video
overlays and other enhancement band services, and must include any Raman impairment from the overlay signal.
unit Single Fiber
Minimum optical loss at 1490 nm
dB 13
Minimum optical loss at 1310 nm
dB 13
Maximum optical loss at 1490 nm dB 28
Maximum optical loss at 1310 nm
dB 28
Table 3-6: B+ Link Budget
3.3.5 C+ Link Budget
This budget covers all optical components between the extended OLT and ONU, including non-integrated WDM filters for the multiplex of video
overlays and other enhancement band services, and must include any Raman impairment from the overlay signal.
unit Single Fiber
Minimum optical loss at 1490 nm
dB 17
Minimum optical loss at 1310 nm dB 17
Maximum optical loss at 1490 nm dB 32
Maximum optical loss at 1310 nm
dB 32
Maximum fiber length km 60
Table 3-7: C+ Link Budget
3.4 Power Supply Options
As mentioned above, the OLT system uses a -48VDC input voltage for its power supply. It works properly within -40.50VDC to -57VDC voltage
range in compliance with the ETSI EN 300 132-2 V2.1.1 (2003-01) recommendation. The earth connections comply with the ETSI ETS 300 253:
January 1995 recommendation.
Note: An optional version with a single 210-250 VAC power feed is also available upon request.
3.5 Power Consumption
Please see below the unit parts Power consumption.
Type of Unit Unit name Power Consumption (W@-48VDC)
Chassis OLT Ref.769401 < 20 (Fan Module)
OLT Ref.769401 single board OLT Ref.769401 < 90
Table 3-8: Power Consumption