AddPac AP-IP230, Инструкция по установке и эксплуатации

Страница: 157 / 164

AP-IP230 IP Phone Installation Guide Version 1.0
AddPac Technology Proprietary & Documentation
157
H.323
An International Telecommunication Union (ITU-T) standard that describes
packet-based video, audio, and data conferencing.
HBD3
Line code type of E1 line.
HDLC
An acronym for High-Level Data Link Control. A transmission protocol for the
Data Link Layer. In HDLC, data is organized into a unit (called a frame) and
sent across a network to a destination that verifies its successful arrival.
Variations of HDLC are also used for the public networks that use the X.25
communications protocol and for frame relay, a protocol used in both and wide
area network, public and private.
Hookflash
Short on-hook period usually generated by a telephone-like device during a
call to indicate that the telephone is attempting to perform a dial-tone recall
from a PBX. Hookflash is often used to perform call transfer.
HTTP
An acronym for Hypertext Transfer Protocol. A file transfer protocol used by
web browser or web server for transmitting text or graphic files.
IPSec
Internet Protocol Security protocol, a framework for a set of protocols for
security at the network or packet processing layer of network communication.
Earlier security approaches have inserted security at the Application layer of
the communications model. IPsec is said to be especially useful for
implementing virtual private networks and for remote user access through
dialup connection to private networks. A big advantage of IPsec is that security
arrangements can be handled without requiring changes to individual user
computers. Cisco has been a leader in proposing IPsec as a standard (or
combination of standards and technologies) and has included support for it in
its network routers.
IPv6
IPv6 (Internet Protocol Version 6) is the latest level of the Internet Protocol (IP)
and is now included as part of IP support in many products including the major
computer operating systems. IPv6 has also been called "IPng" (IP Next
Generation). Formally, IPv6 is a set of specifications from the Internet
Engineering Task Force (IETF). IPv6 was designed as an evolutionary set of
improvements to the current IP Version 4. Network hosts and intermediate
nodes with either IPv4 or IPv6 can handle packets formatted for either level of
the Internet Protocol. Users and service providers can update to IPv6
independently without having to coordinate with each other.
ISP
An ISP (Internet service provider) is a company that provides individuals and
other companies access to the Internet and other related services such as
Web site building and virtual hosting. An ISP has the equipment and the
telecommunication line access required to have a point-of-presence on the
Internet for the geographic area served. The larger ISPs have their own
highspeed