Cisco ONS 15454 Reference Manual page 248

5.2 5.2 E100T-12 Card
autoconfigure to operate at either half or full duplex and determine whether to enable or disable flow
control. You can also configure Ethernet ports manually.
diagram of the card.
Figure 5-1
E100T
12
FAIL
ACT
SF
The E100T-12 Ethernet card provides high-throughput, low-latency packet switching of Ethernet traffic
across a SONET network while providing a greater degree of reliability through SONET self-healing
protection services. This Ethernet capability enables network operators to provide multiple
10/100-Mbps access drops for high-capacity customer LAN interconnects, Internet traffic, and cable
modem traffic aggregation. It enables the efficient transport and co-existence of traditional time-division
multiplexing (TDM) traffic with packet-switched data traffic.
Each E100T-12 card supports standards-based, wire-speed, Layer 2 Ethernet switching between its
Ethernet interfaces. The IEEE 802.1Q tag logically isolates traffic (typically subscribers). IEEE 802.1Q
also supports multiple classes of service.
Cisco ONS 15454 Reference Manual, R7.0.1
5-4
E100T-12 Faceplate and Block Diagram
Ethernet
10/100
MACs/switch
PHYS
Buffer
memory
Figure 5-1 shows the faceplate and a block
Flash DRAM CPU
A/D Mux
FPGA BTC
Control
memory
Chapter 5 Ethernet Cards
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