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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 5 Ethernet Cards
5.4 G1000-4 Card
5.4 G1000-4 Card
The ONS 15454 SDH uses G1000-4 cards for Gigabit Ethernet (1000 Mbps). The G1000-4 card
provides four ports of IEEE-compliant, 1000-Mbps interfaces. Each port supports full-duplex operation
for a maximum bandwidth of STM-16 on each card.
The G1000-4 card uses GBIC modular receptacles for the optical interfaces. For details, see the
“5.8 GBICs and SFPs” section on page 5-14.
Figure 5-3 shows the card faceplate and the block diagram of the card.
Figure 5-3 G1000-4 Faceplate and Block Diagram
The G1000-4 Gigabit Ethernet card provides high-throughput, low latency transport of Ethernet
encapsulated traffic (IP and other Layer 3 protocols) across a SDH network. Carrier-class Ethernet
transport is achieved by hitless (< 50 ms) performance in the event of any failures or protection switches
(such as 1+1 automatic protection switching [APS], SNCP ring, or MS-SPRing. Full provisioning
support is possible via Cisco Transport Controller (CTC) or Cisco Transport Manager (CTM). Each
G1000-4 card performs independently of the other cards in the same shelf.
Flash DRAM CPU
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GBICs
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Trans-
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Ethernet
MACs/switch
Mux/
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FPGA
Inter-
face
FPGA
BTC
POS
Function
Buffer
memory
Protect/
Main
Rx/Tx
BPIAs
Power
Clock
Generation
To FPGA, BTC,
MACs
FAIL
ACT
G1000
4
RX
1
TX
RX
2
TX
RX
3
TX
RX
4
TX
ACT/LINK
ACT/LINK
ACT/LINK
ACT/LINK