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Operations support system
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Operations support system : ウィキペディア英語版
Operations support system
Operations support systems (OSS), or operational support systems in British usage,〔See Wikipedia article Operations research.〕 are computer systems used by telecommunications service providers to manage their networks (e.g., telephone networks). They support management functions such as network inventory, service provisioning, network configuration and fault management.
Together with business support systems (BSS), they are used to support various end-to-end telecommunication services. BSS and OSS have their own data and service responsibilities. The two systems together are often abbreviated OSS/BSS, BSS/OSS or simply B/OSS.
The acronym OSS is also used in a singular form to refer to all the Operations Support Systems viewed as a whole system.
Different subdivisions of OSS have been proposed by the TM Forum, industrial research labs or OSS vendors. In general, an OSS covers at least the following five functions:
*Network management systems
*Service delivery
*Service fulfillment, including the network inventory, activation and provisioning
*Service assurance
*Customer care
== History==

Before about 1970, many OSS activities were performed by manual administrative processes. However, it became obvious that much of this activity could be replaced by computers. In the next 5 years or so, the telephone companies created a number of computer systems (or software applications) which automated much of this activity. This was one of the driving factors for the development of the Unix operating system and the C programming language. The Bell System purchased their own product line of PDP-11 computers from Digital Equipment Corporation for a variety of OSS applications. OSS systems used in the Bell System include AMATPS, CSOBS, EADAS, Remote Memory Administration System (RMAS), Switching Control Center System (SCCS), Service Evaluation System (SES), Trunks Integrated Record Keeping System (TIRKS), and many more. OSS systems from this era are described in the Bell System Technical Journal, Bell Labs Record, and Telcordia Technologies (now part of Ericsson) SR-2275.
Many OSS systems were initially not linked to each other and often required manual intervention. For example, consider the case where a customer wants to order a new telephone service. The ordering system would take the customer's details and details of their order, but would not be able to configure the telephone exchange directly — this would be done by a switch management system. Details of the new service would need to be transferred from the order handling system to the switch management system — and this would normally be done by a technician re-keying the details from one screen into another — a process often referred to as "swivel chair integration". This was clearly another source of inefficiency, so the focus for the next few years was on creating automated interfaces between the OSS applications — OSS integration. Cheap and simple OSS integration remains a major goal of most telecom companies.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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