Grandstream Networks Grandstream BudgeTone 200 User Manual download pdf (Page 49)

European digital mobile 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.

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.

DSP

Digital Signal Processing. Using computers to process signals such as sound,

video, and other 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 #).

FQDN

Fully Qualified Domain Name

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Grandstream Networks Grandstream BudgeTone 200 User Manual Page 49