Appendix D - Glossary
Administration Manual (H.323 Version)
AT-VP504E FXO
98
Mu (µ)-Law The PCM (Pulse Code Modulation) voice coding and companding
standard used in Japan and North America.
Network A group of computers, terminals, and other devices and the hardware
and software that enable them to exchange data and share resources
over short or long distances. A network can consist of any combination
of local area networks (LAN) or wide area networks (WAN).
Off-hook A line condition caused when a telephone handset is removed from its
cradle.
On-hook A line condition caused when a telephone handset is resting in its
cradle.
Packet Includes three principal elements: control information (such as
destination, origin, length of packet), data to be transmitted, and error
detection and A group of bits, including data and control signals,
arranged in a specific format and transmitted as a whole. The structure
of a packet depends on the protocol. In general, a packet includes
three principal elements: control information (such as destination,
origin, length of packet), data to be transmitted, and error detection and
correction bits. An information block identified by a label at layer 3 of
the OSI reference model correction bits. An information block identified
by a label at layer 3 of the OSI reference model.
Port Network access point, the identifier used to distinguish among multiple
simultaneous connections to a host.
Private Branch
Exchange (PBX)
A small to medium sized telephone system and switch that provides
communications between onsite telephones and exterior
communications networks.
Programmable Read-
Only Memory (PROM)
A memory chip where data is written only once as it remains there
forever. Unlike RAM, PROMs retain their contents when the computer
is turned off.
Protocol A formal set of rules developed by international standards bodies, LAN
equipment vendors, or groups governing the format, control, and
timing of network communications. A set of conventions dealing with
transmissions between two systems. Typically defines how to
implement a group of services in one or two layers of the OSI reference
model. Protocols can describe low-level details of machine-to-machine
interfaces or high-level exchanges between allocation programs
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...
