17 — I-040G-A unit data sheet
17-4 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
17.4 Special considerations
In order to provide four GE ports on the I-040G-A indoor ONT, an Ethernet switch
has been added between the SoC and the Ethernet ports; See Figure 17-1. The
Ethernet switch provides the following features:
• IGMP packet replication for multicast channels
• internal VLAN tagging to direct traffic to appropriate ports and priority queues
Figure 17-1 Ethernet switch
IGMP packet replication allows the I-040G-A indoor ONT to support IPTV on all
four Ethernet channels at the same time. Internal VLAN tagging allows traffic to be
routed and prioritized between the two Ethernet MACs on the SoC and the Ethernet
switch and the appropriate subscriber RJ-45 ports.
The new Ethernet switch functional block and the additional Ethernet switch features
have modified certain VLAN tagging and priority queuing behaviors. The following
sections describe these modifications.
Note — The RF video amplifier is integrated with the triplexer. It is
shown split-out in Figure 17-1 to illustrate the functionality.
Note 1 — Due to certain Ethernet switch restrictions, the I-040G-A
indoor ONT provides up to 4 IP, 4 MAC, or 2 pairs of MAC/IP based
anti-spoofing (static only). MAC, IP, and MAC/IP anti-spoofing only
works on both IPoE packets.
Note 2 — Congestion may occur if Ethernet ports 1 and 2 or ports 3
and 4 are each set to 1000Base-T and are being used simultaneously.
See the ONT Customer Release Notes for this product for throughput
details.
Power
Converter
SOCGPON
POTS
Ethernet
switch
RJ-11
RJ-45
F
Video amplifier
Triplexer
1939
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