3 — ONT and MDU general and interface technical specifications
3-6 March 2011 Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a
ONT Product Information Guide Edition 01 3FE 54199 AAAA TCZZA
A set-top box is required for the IP video 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.
The Ethernet port can be set to the following:
• 10/100/1000BASE-T auto negotiation
• 10/100/1000BASE-T half duplex
• 10/100/1000BASE-T full duplex
• 10BASE-T auto-sensing
• 10BASE-T half duplex
• 10BASE-T full duplex
• 100BASE-T auto-sensing
• 100BASE-T half duplex
• 100BASE-T full duplex
• 1000BASE-T auto-sensing
• 1000BASE-T half duplex
• 1000BASE-T full duplex
ONTs support IP video service using the Internet Group Management Protocol
(IGMP). In particular, ONTs support IGMP snoop.
The IGMP snooping function supports:
• the ability to enable and disable IGMP per Ethernet 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
IGMP snoop
The ONT supports an IGMP snoop facility. The IGMP snoop facility snoops (looks
into) upstream join and leave messages, and maintains the multicast forwarding
database supported by the ONT hardware, which keeps track of the IP multicast
streams that subscribers are currently viewing.
Note — For ONTs that have SoC technology on-board in a
two-Ethernet port device, only one Ethernet UNI port at a time can be
configured for IPTV and multicast streams.
Note — The IGMP snoop facility only drops an IGMP message if the
IGMP message rate limit is exceeded.
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