Description In addition to the two standard Synchronous interfaces, the BayStack AN and ANH can be configured, either at the factory or as a field upgrade, with an optional third Synchronous, ISDN BRI, T1/FT1 DSU/ CSU or 56/64 Kbps DSU/CSU adapter module. With these modules, the BayStack AN and ANH routers can provide a single-platform solution for applications requiring a primary link, backup link, and Synchronous interface for legacy (SDLC, X.25, Binary Synchronous Communications (BSC)) integration.
