Cisco 15327 - Manual (Page 391)

23-11
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 23 E-Series and G-Series Ethernet Operation
One-Port Bidirectional Transponder Mode
One-Port Bidirectional Transponder Mode
One-port bidirectional transponder mode maps the Ethernet frames received at a port out the transmitter
of the same port (
Figure 23-9 ). This mode is similar to two-port bidirectional transponder mode except
that a port is mapped only to itself instead of to another port. Although the data path of the one-port
bidirectional transponder mode is identical to that of a facility loopback, the transponder mode is not a
maintenance mode and does not suppress non-SONET/SDH alarms, such as loss of carrier (CARLOSS).
This mode can be used for intermediate DWDM signal regeneration and to take advantage of the wide
band capability of the CWDM and DWDM GBICs. This allows the node to receive on multiple
wavelengths but transmit on a fixed wavelength.
Figure 23-9 One-Port Bidirectional Transponder Mode
Two-Port Unidirectional Transponder Mode
Ethernet frames received at one port’s receiver will be transmitted out the transmitter of another port.
This mode is similar to two-port bidirectional transponder mode except only one direction is used
(
Figure 23-10 ). One port has to be provisioned as unidirectional transmit only and the other port as
unidirectional receive. The port configured as unidirectional transmit ignores any lack of signal on the
receive port, so the receive port fiber does not need not be connected. The port configured as
unidirectional receive does not turn on the transmit laser, so the transmit port fiber does not need to be
connected.
This mode can be used when only one direction needs to be transmitted over CWDM/DWDM, for
example, certain video on demand (VoD) applications.
90913
G-Series Card
Tx Port
Rx Port
Note:
This configuration can be used when the client
terminal's optical signal is single-mode, 1310 nm,
1550 nm, or 15xx.xx nm.
ONS Node
Cross-Connect
Card
Optical Card
Tx Port
Rx Port
GBIC Standard SX, LX, ZX
GBIC CWDM or DWDM
Ethernet TDM
xWDM Lambda 1
xWDM Lambda 2
xWDM Lambda 3
xWDM Lambda 4
Gigabit Ether
net P
o
rt
s