Gigaset N720 DECT IP Multicell System

GlossarydBmDCSDECTThe selection of the codec for the telephone connection therefore influences the voicequality and, via the available bandwidth, the possible number of usable channels perbase station.Codecs in £Broadband modeG.722Excellent voice quality. The G.722 codec works at the same bit rate as G.711 (64 kbit/sper speech connection) but with a higher sampling rate. This allows higher frequenciesto be played back. The speech tone is therefore clearer and better than with theother codecs and enables a speech tone in High Definition Sound Performance(£HDSP).G.711 a law/G.711 µ lawExcellent voice quality (comparable with ISDN). The necessary bandwidth is 64 kbit/sper voice connection.Codecs in £Narrowband modeG.726Good voice quality (inferior to that with G.711 but better than with G.729). The necessarybandwidth is 32 kbit/s per voice connection.G.729Average voice quality. The necessary bandwidth is less than or equal to 8 kbit/s pervoice connection.Decibel (dB) related to milliwatt (mW)Unit of measure for the send power.0 dBm corresponds to a power of 1 mW, larger power values have positive dBm values,smaller power values have negative dBm values. The ratio of dBm to mW is logarithmic.An increase of 30 dB corresponds to a thousand fold increase.Consequently, the power of one microwatt (µW) corresponds to -30 dBm, one nanowatt(nW) to -60 dBm and one picowatt (pW) to -90 dBm.Dynamic Channel SelectionA process for DECT radio networks that base stations can use to flexibly determine andselect the channels with the best availability.Digital Enhanced Cordless TelecommunicationsGlobal standard for wireless connection of mobile end devices (handsets) to telephonebase stations.DECT ManagerExchange in a DECT multi-cell system. The DECT Manager groups several DECT base stationstogether as a DECT network.48VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299