公开(公告)号：US3585306A

公开(公告)日：1971-06-15

申请号：US3585306D

申请日：1968-05-16

Applicant: BELL TELEPHONE LABOR INC

Inventor： BATTOCLETTI FRANK E ,  DAGNALL CLARENCE H JR ,  SHELDAHL STEPHAN A

IPC: H04J3/12 ,  H04Q3/54 ,  H04Q11/04 ,  H04J3/00

CPC classification number: H04Q11/04 ,  H04J3/12 ,  H04Q3/54

Abstract: A tandem office switching system is disclosed which will accommodate both digital and analog signals transmitted in single or multiplexed message form. A space division system switches analog signals received in serial single message form and a time division system switches digital signals received in multiplex message form. All signals received in the time division system are processed in accordance with timing derived from the incoming digital signals while signals transmitted from the time division system are processed in accordance with the tandem office timing. The system permits the switching of incoming analog signals to outgoing digital trunks and incoming digital signals to outgoing analog trunks through both space and time division systems.