O-BCSM - Originating – Basic Call State ModelThe BCSM (Basic Call State Model) is a high-level finite state machine description of the CCF (Call Control Function) activities required to establish... View more
O-CSI - Originating – CAMEL Subscription InformationCAMEL operation requires additional CSI (CAMEL Subscription Information) to be included as part of a mobile subscriber's subscription information in t... View more
O-IM-CSI - Originating – IP Multimedia – CAMEL Subscription InformationCAMEL operation requires additional O-IM-CSI to be included as part of a mobile subscriber's subscription information in the HSS. This will be forward... View more
O&M - Operations & MaintenanceThis term refers to the processes and functions used in provisioning and managing a network or element within a network. ... View more
OAM - Operations, Administration and MaintenanceThis term refers to the processes and functions used in provisioning and managing a network or element within a network. ... View more
OBEX - Object EXchange ProtocolObject Exchange Protocol was originally developed to allow the exchange of data objects over an infrared link. It can also be used over other transpor... View more
ObjectThe term object is commonly found in both telecommunication and computer networks. It can be described as an element within the network defined by a s... View more
OCF - Online Charging FunctionIn the 3GPP IMS (IP Multimedia Subsystem) architecture, the OCF forms an integral part of the online charging system, determining whether or not, from... View more
OCF - Open Connectivity FoundationThe Open Connectivity Foundation represents a number of companies involved in the development of standards to connect the billions of devices forming ... View more
OCS - Online Charging SystemThe OCS is the main element of a service provider's online (prepaid) billing architecture. In this capacity, the OCS interacts with a number of networ... View more
OCSP - Online Certificate Status ProtocolOCSP (Online Certification Status Protocol) has been developed as the requirements of e-commerce and m-commerce have evolved. This protocol provides r... View more
OFB - Output FeedbackOFB is a mode of operation for symmetrical block ciphers which allows the block cipher mechanism to be used to create a synchronous stream cipher. ... View more
OFCS - Offline Charging SystemThe OFCS is the main element of a service provider's offline (postpaid) billing architecture. In this capacity, the OFCS interacts with a number of ne... View more
OFDM - Orthogonal Frequency Division MultiplexingOFDM is a multi carrier transmission technique capable of supporting high speed services whilst still being bandwidth efficient. It achieves this by f... View more
OFDMA - Orthogonal Frequency Division Multiple AccessOFDMA (Orthogonal Frequency Division Multiple Access) can be described as an extreme application of channelization. However, whereas OFDM sub-channeli... View more
OFTEL - Office of TelecommunicationsOffice of Telecommunications is a United Kingdom government organization set up in 1984 to regulate the UK's telecommunication industry.... View more
OIC - Open Interconnect ConsortiumThis is the former name of the organization now known as the OCF (Open Connectivity Foundation).... View more
OIP - Originating Identification PresentationOIP is a supplementary service in which the network provides the Called Party with the trusted identity of the Calling Party.... View more
OIR - Originating Identification RestrictionOIR is a supplementary service in which the network does not provide the Called Party with the Calling Party's identity.... View more
OLT - Optical Line TerminationOLT is the name given to the optical device that sits at the head end of a PON or FTTx system. As such, the OLT is responsible for coordination of a n... View more