Cisco ONS 15454 - Page 248

5-4
Cisco ONS 15454 Reference Manual, R7.0.1
OL-9217-01
Chapter 5 Ethernet Cards
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. Figure 5-1 shows the faceplate and a block
diagram of the card.
Figure 5-1 E100T-12 Faceplate and Block Diagram
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.
10/100
PHYS
A/D Mux
Flash
DRAM
CPU
Buffer
memory
Control
memory
Ethernet
MACs/switch
61362
FPGA BTC
B
a
c
k
p
l
a
n
e
1
2
3
4
5
6
7
8
9
10
11
12
FAIL
ACT
SF
E100T
12