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This document uses the following terms:
200 OK: A response to indicate that the request has succeeded.
Application Sharing Multipoint Control Unit (ASMCU): A Multipoint Control Unit (MCU) that supports application sharing conferencing.
call: A communication between peers that is configured for a multimedia conversation.
endpoint: A device that is connected to a computer network.
focus: A single user agent that maintains a dialog and Session Initiation Protocol (SIP) signaling relationship with each participant, implements conference policies, and ensures that each participant receives the media that comprise the tightly coupled conference.
INVITE: A Session Initiation Protocol (SIP) method that is used to invite a user or a service to participate in a session.
MCU-Conference-URI: A literal that specifies a URI that can be used to access conferencing services in the context of a Multipoint Control Unit (MCU).
Multipoint Control Unit (MCU): A server endpoint that offers mixing services for multiparty, multiuser conferencing. An MCU typically supports one or more media types, such as audio, video, and data.
participant: A user who is participating in a conference or peer-to-peer call, or the object that is used to represent that user.
Real-Time Transport Protocol (RTP): A network transport protocol that provides end-to-end transport functions that are suitable for applications that transmit real-time data, such as audio and video, as described in [RFC3550].
Remote Desktop Protocol (RDP): A multi-channel protocol that allows a user to connect to a computer running Microsoft Terminal Services (TS). RDP enables the exchange of client and server settings and also enables negotiation of common settings to use for the duration of the connection, so that input, graphics, and other data can be exchanged and processed between client and server.
SDP answer: A Session Description Protocol (SDP) message that is sent by an answerer in response to an offer that is received from an offerer.
SDP offer: A Session Description Protocol (SDP) message that is sent by an offerer.
Session Description Protocol (SDP): A protocol that is used for session announcement, session invitation, and other forms of multimedia session initiation. For more information see [MS-SDP] and [RFC3264].
Session Initiation Protocol (SIP): An application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. SIP is defined in [RFC3261].
sharer: A client that is participating in a conference and is transmitting keyboard and mouse signals, and desktop graphics through a Real-Time Transport Protocol (RTP) media connection.
Uniform Resource Identifier (URI): A string that identifies a resource. The URI is an addressing mechanism defined in Internet Engineering Task Force (IETF) Uniform Resource Identifier (URI): Generic Syntax [RFC3986].
Video-based Screen Sharing: A protocol that uses video modality to share the client's screen with another client directly or via a multipoint control unit (MCU).
viewer: A client that is participating in a conference and is receiving mouse and keyboard signals, and desktop graphics through a Real-Time Transport Protocol (RTP) media connection.
MAY, SHOULD, MUST, SHOULD NOT, MUST NOT: These terms (in all caps) are used as defined in [RFC2119]. All statements of optional behavior use either MAY, SHOULD, or SHOULD NOT.