Telco Switching Control Center System
The Switching Control Center System was an Operations Support System
deployed during the early 1970s. The SCCS replaced the need for
full staffing switching centers 24 hours a day 365 days a year.
Instead, the SCCS allows telephone companies to significantly reduce
the number of technicians by implementing a local switching control
center office and dispatching technicians as required to resolve
problems or perform routine maintenance operations.
During the early 1970s, other older electromechanical switching
systems such as the Number 1 Crossbar, Number 5 Crossbar, and Step-By-Step
circuit switching systems were also phased out, and replaced with
newer electronic switching systems controlled by proprietary computers.
The SCCS system was phased out during the late 1980s and replaced
by an OSS known as Network Monitoring and Analysis [NMA].
The primary purpose of the SCCS system was to provide operations,
administration, maintenance, and provisioning [OAMP] functions.
Inputs to the SCCS - slow 110 baud teletype messages
from circuit switching systems such as the Number 1 ESS, Number
2 ESS, Number 3 ESS, Number 5 ESS, and Traffic Service Position
System [TSPS] network switches
Outputs from SCCS - analysis, reports, troubleshooting
support, and other functions using newer faster DataSpeed-40 terminals.
Electronic Switching System [ESS]
In telecommunications, an electronic switching system [ESS] is:
- A telephone exchange - digitizes analog signals
from subscriber loops, and interconnects them by assigning the
digitized signals to the appropriate time slots. It may also interconnect
digital data or voice circuits.
- A switching system - with major devices constructed
of semiconductor components.
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