What type of link is it between the 2 sites. Is it a fiber existing between the 2 sites or are you buying a link to a service provider ? If you are going through a service provider, what type of service is he providing (E1, ...). Anyway, there are no fiber modules existing for the 2600. Depending on the type of link used, you could always try to use media convertors (E.g. fiber to UTP).
