Operations support system

Operations support systems (OSS), operational support systems in British usage, or Operation System (OpS) in NTT 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.

Network inventory typically includes both physical assets, such as routers, switches, fiber-optic links and base stations, and logical resources such as IP addresses, VLANs and virtual circuits. Maintaining an accurate and up-to-date inventory is considered essential for provisioning new services, troubleshooting network issues, and planning capacity. Industry research highlights that communication service providers are modernizing inventory platforms to support automation, analytics, and integration with OSS/BSS systems.

Together with business support systems (BSS), operations support systems 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:

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