This course is for Technical Operations technicians and specialists covering the Voice Switching and Control System (VSCS) and VSCS Training and Backup Switch (VTABS). The course is 151 hours Academy Lecture and 130 hours Academy Lab. Lecture subjects include: system architecture, MPES/workstation operations, VSCS console equipment/ PEM, discrete monitor and control, switching subsystem, control subsystem, system monitor, control subsystem, and system interconnect subsystem. Lab procedures include: position reconfiguration, voice channel testing, VCE operations, advanced server operating system utilities, COTS software utilities, database backup operations, VTABS startup and shutdown, VSCS power failure recovery, wire tracing, fault isolation, and periodic maintenance.