Alcatel-Lucent 7330 Product Information Manual page 406

9 — I-010G-B unit data sheet
Considerations and limitations
When using multicast on multiple Ethernet ports, all Ethernet ports must have the same VLAN ID. If
the user-side VLAN IDs are all given the same VLAN ID, a common VLAN ID should result. If not, VLAN
4094 will be used
ONTs are not able to sufficiently buffer enough traffic between grants to support an EIR rate of
1Gb/s over multiple GEM ports. There are only 1.256 Gb/s buffers available in the SoC chip. The
buffers are divided among the number of configured GEM ports. Reducing the number of GEM ports
configured results in increased upstream buffering and higher upstream traffic rates.
Packets of less than 64 bytes are increased to 100 bytes in size with padding under the following
conditions:
•
•
ONTs that use pre R04.00.10 software may not range if the distance from the LT card is less than 1km
The default optical thresholds for this ONT are as follows:
•
•
9-10
Table 9-10 I-010G-B ONT considerations and limitations
in a downstream direction
in an upstream direction only if the ONT has more than 2 Ethernet ports
Low optical threshold: -27.00 dBm
High optical threshold: -8.00 dBm
March 2011
ONT Product Information Guide Edition 01
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