Specifications

4-99
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
E100T-12 Card
4.32 E100T-12 Card
Do not use the E100T-12 when the XC10G cross-connect card is in use. The ONS 15454 uses E100T-12
cards for Ethernet (10 Mbps) and Fast Ethernet (100 Mbps). Each card provides 12 switched, IEEE
802.3-compliant, 10/100 Base-T Ethernet ports that can independently detect the speed of an attached
device (auto-sense) and automatically connect at the appropriate speed. The ports auto-configure 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 4-35 shows the faceplate and a block diagram of the card.
Figure 4-35 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 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 802.1Q tag logically isolates traffic (typically subscribers). 802.1Q also
supports multiple classes of service.
10/100
PHYS
A/D Mux
Flash
DRAM
CPU
Buffer
memory
Control
memory
Ethernet
MACs/switch
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E100T
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