5 — SoC based ONT functional blocks
5-6 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
The video overlay function operates in the 1550 nm optical band. Signals sent over
the overlay network are presented to the subscriber as RF signals from a video F
connector in the ONT.The RF video service supports most available cable television
(CATV) services, including video-on-demand (VOD), interactive video (games),
and standard and premium analog and digital channels.
Figure 5-3 shows an ONT with a triplexer, four POTS, two Ethernet ports, and one
optional RF video port.
Figure 5-3 ONT with a triplexer
The video amplifier produces the required RF output for the subscriber video
equipment. The RF subsystem monitors the levels of optical and RF signals in
support of the performance management functions.
5.5 SoC ONTs with MoCA subsystem
The SoC functional block can also work in conjunction with a MoCA adapter that
converts Ethernet packets into MoCA packets capable transmission over a coaxial
cable.
Data packets are forwarded through the SoC to the Ethernet MAC described in
section 5.3. The data packets are sent over the GMII to a multimedia over coaxial
(MoCA) adapter. The MoCA adapter converts the data packets into MoCA packets
and forwards them over the same coaxial interface used for RF video. The MoCA
adapter is enabled or disabled by the SoC control processor.
Figure 5-4 shows an ONT with one Ethernet port and one MoCA adapter.
Power
Converter
SOCGPON
POTS (4)
Ethernet (2)
RJ-11
RJ-45
F
Video amplifier
Triplexer
1878
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