| Definity Expansion Interface cards Hi Can anone guide me on linking a Definity, (version6 software) via Multi mode fibre to another (version6) cabinet, approx 1 km apart. I presume I will need Expansion interface cards TN 570C and 9823A transceivers at both ends. My question is, do I need only one card at each end or do I need 1 card in and 1 card out. Cheers John H |