Appendix D - Glossary
Administration Manual (H.323 Version)
AT-VP504E FXO
99
Public Switched
Telephone Network
(PSTN)
The local telephone company network that carries voice data over
analog telephone lines.
Quality of Service
(QoS)
Quality of Service is a measure of the telephone service quality
provided to a subscriber. This could be, for example, the longest time
someone should wait after picking up the handset before they receive
dial tone (three seconds in most U.S. states).
Realtime Transport
Protocol (RTP)
An IETF standard for streaming realtime multimedia over IP in packets.
Supports transport of real-time data like interactive voice and video
over packet switched networks.
Ringer Equivalence
Number (REN)
Acronym for . A number that represents the ringer loading effect on a
line. Note: A ringer equivalency number of 1 represents the loading
effect of a single traditional telephone set ringing circuit. Modern
telephone instruments may have a REN lower than 1. The total REN
expresses the total loading effect of the subscriber’s equipment on the
central office ringing current generator. The service provider usually
sets a limit, e.g., 3, 4, or 5 (representing “extension,” i.e., parallel-
connected telephones), to the total REN on a subscriber’s loop.
Router A specialized switching device that allows customers to link different
geographically dispersed local area networks and computer systems.
This is achieved even though it encompasses different types of traffic
under different protocols, creating a single, more efficient, enterprise-
wide network.
Server A computer or device on a network that works in conjunction with a
client to perform some operation, for example a Windows NT Server.
Simple Network
Monitor Protocol
(SNMP)
A standard of network management that uses a common software
agent to manage local and wide area network equipment from different
vendors; part of the Transmission Control Protocol / Internet Protocol
(TCP/IP) suite and defined in RFC 1157.
Subnet An efficient means of splitting packets into two fields to separate
packets for local destinations from packets for remote destinations in
TCP/IP networks.
Summary of Contents for AT-VP504E FXS
Page 1: ...AT VP504E FXO H 323 Administration Manual PN 990 11592 10 Rev C VoIPTalk...
Page 16: ...Chapter 1 Introducing the AT VP504E FXO Administration Manual H 323 Version AT VP504E FXO 8...
Page 76: ...Chapter 5 Software Upgrade Administration Manual H 323 Version AT VP504E FXO 68...
Page 100: ...Appendix C Gatekeeper Registration Logic Administration Manual H 323 Version AT VP504E FXO 92...
Page 112: ...Index Administration Manual H 323 Version AT VP504E FXO 104...
