5 — SoC based ONT functional blocks
5-8 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Figure 5-6 ONT with one Ethernet port, one MoCA adapter, and one RF-optical return
adapter
SoC based ONT that provides one Ethernet connection, one shared RF video and
MoCA coaxial connection, and one RF-optical return coaxial connection. IP video
traffic cannot run on both the coaxial and Ethernet connections at the same time. The
RF-optical return connection supports data on the Ethernet connection and MoCA
connection simultaneously as well as on a return path over a passive fiber optic
distribution network.
The MoCA data channel shares the coaxial cable medium with the RF video signals.
The MoCA data channel is 50 MHz wide in the frequency range of 800 to 1500 MHz,
while the RF video channel is 6 MHz wide carrying downstream video signals in the
frequency range of 54 MHz to 860 MHz.
A set-top box is required for the video and MoCA services. The box is a device that
uses a television set as a user interface to the Internet and also provides RJ-45 ports
for data service. The requirement for the television set associated with the set-top box
is that it must be able to receive and display analog broadcasts on channel 3 or 4.
Picture quality and options can be enhanced if the television set supports digital
broadcasts.
The outdoor ONT supports IP video service using the Internet group management
protocol (IGMP). The IGMP snooping function supports:
• the ability to enable and disable IGMP per Ethernet or MoCA port
• the ability to age out multicast MAC addresses in the IGMP table
• G.984.3 compliant multicast using a single GEM port-ID for all video traffic (as
mandated by G.984.3)
• up to of 64 video multicast streams per ONT
• IPoE and PPPoE packets
Power
Converter
SOC
POTS (2)
Ethernet (1)
RJ-11
RJ-45
F
Video amplifier
1981
MoCA Adapter
Triplexer
PON
RF-optical
return
adapter
RF
RF retu
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