Cisco 15327 User Manual download pdf (Page 391)

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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 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 Ethernet Ports

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