The 5ESS Switching System : Architectural Overview

Section: Osps Hardware Architecturementioning

confidence: 99%

OSPS System Architecture

Basso

Beuscher

Dowden

et al. 1989

“…The overall reliability and availability objectives of the 5ESS switch ing system are detailed in Ref. 4. From a maintenance perspective, these objectives distill into the following points: First, the 5ESS switching system should perform as much of the maintenance as it can without the need for craft intervention.…”

Section: Maintenance Objectivesmentioning

confidence: 99%

The5ESSSwitching System: Operations, Administration, and Maintenance Capabilities

Fuhrer

Gitten

Newman

et al. 1985

Self Cite

The 5ESS™ switching system is a digital, time-division switching system that is being introduced into a multiplicity of operating environments-local, toll, private networks, and stand-alone applications. Many of these operating environments are currently dominated by analog, space-division switching systems. Furthermore, the 5ESS switching system is being introduced into environments in which there have been increasing trends toward centralization and mechanization of operating procedures through the use of minicomputerbased support systems. The 5ESS switching system has been designed to allow a smooth incorporation into these mechanized operating environments, while still retaining features needed for stand-alone operations in less mechanized environments. This paper describes the operational features, both administrative and maintenance, of the 5ESS switching system. The emphasis is on the features that differ from those of earlier stored program control switching systems. These include features that represent enhancements over those of earlier systems, differences mandated by a digital, time-division technology, and features designed to more readily adapt to operations support systems.

“…Permission to reproduce or republish any other portion of this paper must be obtained from the Editor. ability have been integrated into the total system architecture. 1 In addition, features that support the maintenance of trunks and lines terminating on the 5ESS switch have been integrated into the system design. These include a comprehensive set of capabilities that permit interactive, automatic, routine, and remote testing of lines and trunks.…”

Section: Introductionmentioning

confidence: 99%

The5ESSSwitching System: Maintenance Capabilities

Haugk

Lax

Royer

et al. 1985

In developing the 5ESS™ switching system, a digital switch with distributed control, major emphasis has been placed on reliability, quality of service to the customer, and efficiency of the human interface for the telephone operating companies. To achieve a high-reliability design for this system, a robust hardware/software architecture has been developed with emphasis on a net working approach to functional maintenance organization. Building on this approach, a highly effective set of capabilities is provided for the detection and sectionalization of errors, and for recovery from software and hardware faults. Complete diagnostic aids are available, and flexible video display terminals provide an efficient and attractive means for telephone operating company personnel to interface to the system. Further, a wide range of automated, as well as manual, trunk and line test features are integrated into the system design; and interfaces to both local work stations and operational support systems provide a variety of options for efficient maintenance operation.