Transponder

Transponders are components that convert signals from one protocol to another. In WDM, transponders operate in one of two ways:

• Converting from OCN to OCH

• Converting from OCH to OCN

  These two cases are modeled in slightly different ways.

  Classes and relationships for OCN-OCH and OCH-OCN transponders shows the classes and relationships for transponders converting from OCN to OCH and from OCH to OCN.

  Figure 1. Classes and relationships for OCN-OCH and OCH-OCN transponders

  

  In the case of translating from OCH to OCN, the internal forward error correction (FEC) port is modeled by a TransponderInFecPort since alarm conditions can be raised on this port.