Grandstream Networks HandyTone-488 User Manual page 44

HandyTone-488 User Manual
FXS
Foreign eXchange Station
An FXS device has hardware to generate the ring signal to the FXO extension (usually an
analog phone).
An FXS device will allow any FXO device to operate as if it were connected to the phone
company. This makes your PBX the POTS+PSTN for the phone.
The FXS Interface connects to FXO devices (by an FXO interface, of course).
DHCP
The Dynamic Host Configuration Protocol (DHCP) is an Internet protocol for automating the
configuration of computers that use TCP/IP. DHCP can be used to automatically assign IP
addresses, to deliver TCP/IP stack configuration parameters such as the subnet mask and
default router, and to provide other configuration information such as the addresses for printer,
time and news servers.
ECHO CANCELLATION
Echo Cancellation is used in
communication in order to improve voice quality on a
quality, this process improves
preventing echo from traveling across a network.
There are two types of echo of relevance in telephony: acoustic echo and hybrid echo.
compression
telephone networks.
H.323
A suite of standards for multimedia conferences on traditional packet-switched networks.
HTTP
Hyper Text Transfer Protocol; the World Wide Web protocol that performs the request and
retrieve functions of a server
IP
Internet Protocol. A packet-based protocol for delivering data across networks.
IP-PBX
IP-based Private Branch Exchange
IP Telephony
(Internet Protocol telephony, also known as Voice over IP Telephony) A general term for the
technologies that use the Internet Protocol's packet-switched connections to exchange voice,
fax, and other forms of information that have traditionally been carried over the dedicated
circuit-switched connections of the public switched telephone network (PSTN). The basic steps
involved in originating an IP Telephony call are conversion of the analog voice signal to digital
telephony
bandwidth
techniques and digital processing
to describe the process of removing
telephone
savings achieved through
delay often contribute to echo generation in
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echo from a voice
call. In addition to improving
silence suppression by
Speech