23-9
Ethernet Card Software Feature and Configuration Guide, R7.2
January 2009
Chapter 23 E-Series and G-Series Ethernet Operation
G-Series Gigabit Ethernet Transponder Mode
A G-Series card configured as a transponder operates quite different ly than a G-Series card configured
for SONET/SDH. In SONET/SDH configurations, the G-Series card receives and transmits Gigabit
Ethernet traffic out the Ethernet ports and GBICs on the front of the card. This Ethernet traffic is
multiplexed on and off the SONET/SDH network through the cross-connect card and the optical card
(Figure 23-7).
Figure 23-7 G-Series in Default SONET/SDH Mode
In transponder mode, the G-Series Ethernet traffic never comes into contact with the cross-connect card
or the SONET/SDH network, but stays internal to the G-Series card and is routed back to a GBIC on that
card (Figure 23-8).
Figure 23-8 G-Series Card in Transponder Mode (Two-Port Bidirectional)
90910
Gigabit Ethernet Ports
Gigabit Ethernet 1
G-Series Card
Gigabit Ethernet 2
Gigabit Ethernet 3
Gigabit Ethernet 4
GBICs
GBIC
Tx Port
Rx Port
ONS Node
Cross-Connect
Card
STS-N(c)
Optical Card
Ethernet TDM
90911
Gigabit Ethernet Ports
G-Series Card
Tx Port
Rx Port
ONS Node
Cross-Connect
Card
Optical Card
Tx Port
Rx Port
GBIC Standard SX, LX, ZX
GBIC CWDM or DWDM
Ethernet TDM
xWDM Lambda1
xWDM Lambda 2