Specifications

VoiceFinder VoIP Gateway Configuration Guide (APOS 2.0) Release Version 3.1
AddPac Technology Co., LTD
- 410 / 416-
HDLC
Stands for High-Level Data Link Control. HDLC is a transmission protocol used in
the data link layer, which is the second layer of the 7-layer OSI model. HDLC is used
in the X.25 packet switching network. Data consists of frames in HDLC, and frames
are transmitted through a network. The destination verifies if the frames have been
successfully transmitted. The HDLC protocol includes data for controlling data flow
and troubleshooting errors in a data frame.
Hookflash
This is a short on-hook duration of a device such as phones during a call. Hookflash
means that a phone attempts to make a dial tone recall through PBX. This is usually
used to perform call transfer.
HTTP
Stands for Hypertext Transfer Protocol. This protocol enables a Web browser or a Web
server to transfer files such as text files and graphic files.
IPSec
Stands for Internet Protocol Security protocol. IPSec is a still developing standard for
the security of networks or the packet processing layer of network communications. In
the previous security techniques, security has been included in the application layers
of a communication model. IPSec is particularly useful for the implementation of
remote user access through dial-up access to Virtual Private Networks (VPN) and
regular private networks. The main advantage of IPSec is that security can be ensured
without replacing an individual user PC with a new one. Cisco takes the initiative of
suggesting IPSec as the standard, and has embedded support to this feature into its
network router.
IPv6
IPv6 is the latest IP, and has been embedded into part of IP support into many products
including the operating systems of PC. IPv6 is called IP Next Generation (IPng), that
is the next-generation IP. IPv6 is the formal IETF standard. IPv6 is designed as an
evolutional version of the currently used IP version 4. Network hosts or intermediate
nodes that adopt either IPv4 or IPv6 can process any packets formulized by either
IPv4 or IPv6; thus, the users and service provides can upgrade their IP to IPv6
individually without collaboration.
ISP
Stands for Internet Service Provider. ISP refers to service providers that provide
Internet access services, Web site construction and Web hosting services to individuals
or enterprises. ISP has devices and communication lines required for Internet access,
and large ISPs have their own high-speed dedicated lines in order to provide services
that have better quality and are less dependent on telephone network service providers
to their customers. The large nationwide ISPs of the U.S. are AT&T WorldNet, IBM
Global Network, MCI, Netcom, UUNet, and PSINet. Those of Korea are INet,
Channeli, Netsgo, and Netian. The users access the Internet through online service