Glossary

IP Multimedia Subsystem (IMS) is a technology that defines how to set up advanced services for 3G cellular networks. IMS offers a flexible vehicle for quickly deploying new revenue-generating applications in the network. An IMS core network allows a service provider to deliver identical IP services to fixed and mobile ...

The IMS Forum are a global non-profit industry association dedicated to the advancement of IP Multimedia Subsystem applications and services interoperability.The IMS Forum is focused on revenue-generating services and best practices for IMS applications convergence. The IMS Forum is the creator and organizer of IMS Plugfest™, NGN Plugfest™, and IMS/NGN ...

The IMS Forum Plugfest is an interoperability event organized by the IMS Forum that brings together service providers and IMS vendors committed to furthering the development of IMS certification, and provides a unique opportunity to establish agreed upon requirements and criteria for IMS applications and services interoperability. The goal of ...

One Voice is an initative started by AT&T, Orange, Telefonica, TeliaSonera, Verizon, Vodafone, Alcatel-Lucent, Ericsson, Nokia Siemens Networks, Nokia, Samsung and Sony Ericsson in an effor to standardize the use of voice over LTE.To that end, the One Voice specification focuses on narrowing down the use of IMS towards supporting ...

VCC is a technology for persistent calls handovers between different types of access networks. It has been adopted by the 3GPP to allow handing over mobile voice calls from circuit switched networks to packet switched ones. IMS is used for VCC implementations for the packet switched network side.

VoLTE is a GSMA specification also known as GSMA PRD IR.92.VoLTE started as an initiative by a group of companies known as One Voice.VoLTE focuses on specifying how voice, SMS and rudimentary supplementary services are signaled over LTE. The signaling selected by LTE is IMS.The test specificaiton document and interoperability ...

XCAP stands for XML Configuration Access Protocol and it is defined by IETF in RFC4825. The purpose of XCAP is to allow manipulation of user-specific data via common HTTP mechanisms. One of important applications for XCAP is management of Presence and IM information in the SIP communication network, where it ...

XDM stands for XML Document Management and is an open standard defined by Open Mobile Alliance (OMA). Full specification can be found here. XDM is enabling interoperable Presence implementations (i.e. SIMPLE), and is used to access and manipulate various XML document stored across the network, all with established identity, authorization ...