Line drivers, signal boosters, short-haul modems, CSUs, DSUs, and so on should
all be available from your local telephone company or suppliers, such as
BlackBox. The type you would use depends on the type of link you have (T1,
1MB, ISDN, DDS, and so on) and data rates you want to achieve.
Because you mention the Telebridge, it seems that you want to route AppleTalk
packets over the link. Other products, like the Solana R-Server, the H-Server,
and the Hayes InterBridge, can do this. Both the R-Server/S and the H-Server
support data rates similar to that of the Telebridge.
Editor's Note 22 June 1992: Solana has discontinued business to our knowledge,
so we are unable to refer you to them directly for further information.