RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Getting Started Guide
Polycom®, Inc. 188
QCIF Quarter CIF. A video format with image size of 176x144 pixels that transmits 9.115 Mbps at
30 frames per second (a quarter of the capacity of CIF). For more information, see CIF.
QoS Quality of Service. QoS defines the performance of a network service, such as the average
delay between packets.
RS-232 A standard for serial interface connection.
RTV Real Time Video protocol provides high quality video conferencing capability to Microsoft
OCS (Office Communicator Server) endpoints.
SIP Session Initiation Protocol. An application-layer protocol designed to work over IP
networks. A SIP service defines the properties and the IP addresses of the SIP network
components.
Span An ISDN line or leased line. A span may be of either T1 (United States) or E1 (Europe)
type. Also called a circuit.
SRTP Encryption of SIP Media is supported using SRTP (Secured Real-time Transport Protocol)
and the AES key exchange method.
T1 Line A 1.5Mb digital switched line used in the United States.
ToS Type of Service. ToS defines optimization tagging for routing audio and video packets.
WAN Wide Area Network. A communications network that services a geographical area larger
than the LAN.
Whiteboard An on-screen shared notebook for placement of shared documents.
Abbreviation/Term Explanation
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