The Campus-RS™ SDI (Serial Data Interfaces) are interface modules that install directly into a
Campus-RS remote or Campus-RS Star concentrator and provide serial data connections to
routers and other network devices. The SDI interface modules include a variety of standard
physical interfaces, including RS-232C, RS-449, RS-530, RS-530A, V.35, and X.21 which can
be configured to operate at n x 56/64 kbps rates up to a maximum of 4.608 Mbps.