Справочник Пользователя для Grandstream Networks 386
HandyTone-386 User Manual
Grandstream Networks, Inc.
41
telephony. DECT covers wireless PBXs, telepoint, residential cordless telephones, wireless
access to the public switched telephone network, Closed User Groups (CUGs), Local Area
Networks, and wireless local loop. The DECT Common Interface radio standard is a
multicarrier time division multiple access, time division duplex (MC-TDMA-TDD) radio
transmission technique using ten radio frequency channels from 1880 to 1930 MHz, each
divided into 24 time slots of 10ms, and twelve full-duplex accesses per carrier, for a total of
120 possible combinations. A DECT base station (an RFP, Radio Fixed Part) can transmit all
12 possible accesses (time slots) simultaneously by using different frequencies or using only
one frequency. All signaling information is transmitted from the RFP within a multiframe (16
frames). Voice signals are digitally encoded into a 32 kbit/s signal using Adaptive Differential
Pulse Code Modulation.
access to the public switched telephone network, Closed User Groups (CUGs), Local Area
Networks, and wireless local loop. The DECT Common Interface radio standard is a
multicarrier time division multiple access, time division duplex (MC-TDMA-TDD) radio
transmission technique using ten radio frequency channels from 1880 to 1930 MHz, each
divided into 24 time slots of 10ms, and twelve full-duplex accesses per carrier, for a total of
120 possible combinations. A DECT base station (an RFP, Radio Fixed Part) can transmit all
12 possible accesses (time slots) simultaneously by using different frequencies or using only
one frequency. All signaling information is transmitted from the RFP within a multiframe (16
frames). Voice signals are digitally encoded into a 32 kbit/s signal using Adaptive Differential
Pulse Code Modulation.
DNS
Short for Domain Name System (or Service or Server), an
Internet
service that translates
domain names
into IP addresses
DID
Direct Inward Dialing
Direct Inward Dialing. The ability for an outside caller to dial to a PBX extension without
going through an attendant or auto-attendant.
going through an attendant or auto-attendant.
DSP
Digital Signal Processing. Using computers to process signals such as sound, video, and other
analog signals which have been converted to digital form.
analog signals which have been converted to digital form.
Digital Signal Processor. A specialized CPU used for digital signal processing.
Grandstream products all have DSP chips built inside.
DTMF
Dual Tone Multi Frequency
The standard tone-pairs used on telephone terminals for dialing using in-band signaling. The
standards define 16 tone-pairs (0-9, #, * and A-F) although most terminals support only 12 of
them (0-9, * and #).
standards define 16 tone-pairs (0-9, #, * and A-F) although most terminals support only 12 of
them (0-9, * and #).
FQDN
Fully Qualified Domain Name
A FQDN consists of a host and domain name, including top-level domain. For example,
www.grandstream.com
is a fully qualified domain name. www is the host, grandstream is the
second-level domain, and.com is the top level domain.