Polycom 1500 Getting Started Manual page 197

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Getting Started Guide
Abbreviation/Term
QCIF
QoS
RS-232
RTV
SIP
Span
SRTP
T1 Line
ToS
WAN
Whiteboard
Polycom®, Inc.
Explanation
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.
Quality of Service. QoS defines the performance of a network service, such as the average
delay between packets.
A standard for serial interface connection.
Real Time Video protocol provides high quality video conferencing capability to Microsoft
OCS (Office Communicator Server) endpoints.
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.
An ISDN line or leased line. A span may be of either T1 (United States) or E1 (Europe)
type. Also called a circuit.
Encryption of SIP Media is supported using SRTP (Secured Real-time Transport Protocol)
and the AES key exchange method.
A 1.5Mb digital switched line used in the United States.
Type of Service. ToS defines optimization tagging for routing audio and video packets.
Wide Area Network. A communications network that services a geographical area larger
than the LAN.
An on-screen shared notebook for placement of shared documents.
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