... E/O and O/E conversion for distances greater than 100 meters betweenactive equipment. May also be used for interoffice transport, for transport to customer premises, and for interface with Ethernet ... (CO) or point-of-presence (POP), providing a common craft interface for performing adds, upgrades, and rearrangements on Ethernet services. In this simplifiedarchitecture, all network elements have ... SituationEthernet-based data services offer the opportunity to create differentiation, command premiumpricing, and earn higher margin for such value-added data services as transparent LANs,...