Gigaset N720 DECT IP Multicell System

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AppendixAccessoriesOrdering Gigaset productsYou can order Gigaset products from your specialist retailer.Case with measuring equipmentGigaset N720 SPK PROItem numberS30852-H2316-R101Spare parts for the Gigaset N720 SPK PROSpare partMeasuring base station Gigaset N720 SPK PROBase carrierBattery pack/base stationCharging device/base stationCalibrated Gigaset S810H measuring handsetGigaset ZX400 headsetUse only original accessories. This will avoid possible health risks and personalinjury, and also ensure that all the relevant regulations are complied with.46VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
GlossaryGlossaryBandwidthThe bandwidth defines the size or transmission capacity of a transmission channel, or,more precisely, the difference between the lowest and highest possible frequency on atransmission channel. The bandwidth is specified in Hz. For digital data transmission, thebandwidth determines the data volume that can pass through a transmission channel ina specified period, i.e., the transmission speed (specified in bit/s).The bandwidth used to transmit analogue voice data via a digital transmission medium,e.g., the Internet for VoIP, determines the number of channels that can be used simultaneouslyand the quality of the voice transmission. How the available bandwidth is used totransmit voice data is determined by the selection of a £Codec. Codecs are available forbroadband transmission up to 64 Kbit/s (£Broadband mode) or narrowband transmissionup to 32 Kbit/s (£Narrowband mode).Broadband modeFor VoIP (digital transmission medium), voice data is transmitted in broadband mode or£Narrowband mode. In broadband mode, a transmission rate or £Bandwidth of64 kbit/s is available.The bandwidth used for the transmission is determined by the selection of a £Codec.CellWireless coverage area of a base station in a multi-cell DECT network.ClusterCodecSubdivision of a DECT network into groups (subnets) by a central management station(DECT Manager). All telephones in the network use the central functions of the PABX(VoIP configuration, directories, etc.). However, the base stations only synchronise withina cluster, meaning that a handover of a handset from one cluster to a neighbouring clusteris not possible.Codec is a procedure that digitalises and compresses analogue voice before it is sent viathe Internet, and decodes (i.e., translates into analogue voice) digital data when voicepackets are received. There are different codecs with differing degrees of compression, forinstance.Both parties involved in the telephone connection (caller/sender and recipient) must usethe same codec. This is negotiated between the sender and the recipient when establishinga connection.The choice of codec is a compromise between voice quality, transmission speed and thenecessary £Bandwidth. A high level of compression, for example, means that the bandwidthrequired for each voice connection is low. However, it also means that the timeneeded to compress/decompress the data is greater, which increases the execution timefor data in the network and thus impairs voice quality. The time required increases thedelay between the sender speaking and the recipient hearing what has been said.47VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
Page 1 and 2: N720 DECT IPMulticell SystemSite Pl
Page 3 and 4: Table of ContentsTable of ContentsS
Page 5 and 6: IntroductionIntroductionThis docume
Page 7 and 8: Criteria for an optimum DECT wirele
Page 9 and 10: IntroductionOverlapping and synchro
Page 11 and 12: Projecting the DECT networkProjecti
Page 13: Projecting the DECT networku Mainta
Page 17 and 18: Alternative calculation for small s
Page 19 and 20: Interference from other cells and n
Page 21 and 22: Projecting the DECT networkPosition
Page 23 and 24: Taking measurementsu Document the p
Page 25 and 26: Connection qualityTaking measuremen
Page 27 and 28: Taking measurementsMeasuring the ce
Page 29 and 30: Taking measurements¤ Install the m
Page 31 and 32: Working with the Gigaset N720 SPK P
Page 33 and 34: Before you beginWorking with the Gi
Page 35 and 36: Please noteu The measuring station
Page 43 and 44: DECT installations in special envir
Page 45 and 46: EnvironmentCustomer care and helpQu
Page 47: AppendixSpecificationsHandset batte
Page 51 and 52: ErlangFrameGlossaryUnit which measu
Page 53 and 54: IndexAAuthorisation . . . . . . . .
Page 55: A31008-M2316-L101-2-7619VoIPon www.

Gigaset N720 DECT IP Multicell System

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