1 Scope

24.5243GPPArchitecture, functional description and signallingHosted enterprise servicesRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The present document describes the architecture and functionality required to support enterprise and corporate services as IMS applications hosted in the NGN operator’s network on behalf of an enterprise (Hosted Enterprise Services).

The present document also specifies the protocol requirements for the UE to attach to the NGN (in particular the IMS) and also any protocol requirements related to application servers provided in support of hosted enterprise services.