Grandstream Networks HandyTone-286 User Manual page 37

HandyTone -286 User Manual
An FXO device can be an analog phone, answering machine, fax, or anything that handles a
call from the telephone company like AT&T. They should also operate the same way when
connected to an FXS interface.
An FXO interface will accept calls from FXS or PSTN interfaces. All countries and regions
have their own standards.
FXO is complimentary to FXS (and the PSTN).
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.
telephony
bandwidth
techniques and digital processing
Grandstream Networks, Inc
to describe the process of removing
telephone
savings achieved through
delay often contribute to echo generation in
37
echo from a voice
call. In addition to improving
silence suppression
.
by
Speech