Tele-Communication (Telecom) Terms Glossary and Dictionary
Step-by-Step Switch (SXS) Switching Equipment
Step-by-Step Switch (SXS) Switching Equipment is a two-wire or four-wire progressive control switching system with a space division network. The two-wire version is used for local, local tandem, toll tandem, and private line switching. It can have ANI, CAMA, CENTREX, and private line switching features. The four-wire version is used as a local tandem or toll tandem.