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Description varix 200/varix 14 (DECT)

2 Planning a cordless communications network

2.5.7

Distance between antennae

The statements made in this chapter basically apply to external and internal omnidirectional
antennae as well. When installing directional antennae on a wall, ensure that these are
mounted horizontally on the same plane (refer to chapter 2.5.5 or Figure 2.10 and Figure
2.11). The distance between directional antennae should not be equal to the wavelength or
a whole multiple of the wavelength (32, 48, 64 cm, …). Ensure that the minimum spacing
between the antennae is 20 cm.

Wall with directional antennae

FP

Directional antennae

to observer

Wall

Fig. 2.10

Incorrect installation

Directional antennae pointing

towards observer

Wall

FP

Spacing

<>

Wavelength

Fig. 2.11

Correct installation

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Summary of Contents for varix 14

Page 1: ...oning Digital PABX system varix 200 Digital PABX system varix 14 with integrated DECT wireless network K OMMUNIKATIONSSYSTEME varix 200 K OMMUNIKATIONSSYSTEME K OMMUNIKATIONSSYSTEME varix 200 varix 200 K OMMUNIKATIONSSYSTEME varix 200 ...

Page 2: ...Edition 03 99 Mat No 77 657 054 System software release 1 5 We reserve the right to make technical modifications ...

Page 3: ... 1 7 Interfaces to private networks 1 7 Overview of digital outside trunk line interfaces 1 8 Digital dedicated line interfaces 1 8 Analogue dedicated line interfaces 1 8 Digital subscriber line interfaces 1 9 Analogue subscriber line interfaces 1 9 1 1 3 Technical data and standards 1 10 System main modules 1 10 Hardware modules 1 10 Digital terminal devices 1 11 Power consumption 1 11 Environmen...

Page 4: ...ons network 2 1 Introduction 2 1 2 2 Flowchart 2 2 2 3 Preparation 2 3 2 3 1 Requirements 2 3 Plan of the building 2 3 On site inspection 2 3 Checklist for each part area 2 4 2 4 Planning 2 10 2 4 1 Installation plan 2 10 2 4 2 Ranges 2 11 2 4 3 System proposal 2 12 2 4 4 Job list 2 12 2 5 Installation 2 13 2 5 1 Cable installation 2 13 2 5 2 Putting the FPs into operation 2 13 2 5 3 Installation ...

Page 5: ... 2 30 Down tilt 2 30 2 9 6 Why carry out propagation time measurements 2 34 2 9 7 DECT standard technical data 2 35 2 9 8 List of abbreviations used 2 36 2 10 Appendix 1 2 37 2 10 1 Planning data 2 37 varix DECT Net measurement report 2 38 2 11 Measurement procedure 2 41 Monitor Mode varix M2 2 41 Service Mode varix M3 2 43 Registering non DeTeWe GAP terminal devices 2 45 2 12 Limits to the number...

Page 6: ... 1 Configuration 6 1 6 1 1 Number of base stations to be operated max 78 or 76 6 1 6 1 2 Number of portable parts that can be operated 6 3 6 1 3 Number of S2MM modules per system max 3 modules 6 3 6 1 4 Use of S0TAS modules 6 3 6 1 5 Traffic values 6 4 6 2 Installation 6 5 7 Appendix 7 1 Abbreviations 7 1 7 2 Terminology 7 3 Enrolment 7 3 Cell radio cell 7 3 Home PST 7 3 Handover 7 3 International...

Page 7: ...ystems are to a large extent identical The range of facilities available and operation are the same for both systems within this product family For DECT applications the appropriate base stations or Fixed Parts FP are connected to the respective interface boards using 2 x 2 wire cables Up to four DECT mobile phones Por table Parts PP can telephone simultaneously via each base station The functions...

Page 8: ...cturer in accordance with the GAP or CAP standard may be used on the system detailed above on condition that they have the following keys 0 to 9 R and Hook Your advantages are mobility and availability but you do not require system functions You can intuitively operate the telephones using the standard user interface common on analogue telephones Base stations can be operated both with GAP CAP ter...

Page 9: ... connection analogue exchange connection Private telecommunications networks S0 DSS1 analogue exchange connection FT ET QSIG digital exchange connection Special interfaces 2 x UP0 Wireless interfaces 2 2 FP 2 x UPD 2 2 FP Cable interfaces UP0 Stimulus UPD Stimulus S0 DSS1 Stimulus a b n RS 232 RS 232 varix 14 digital PABX system 1 2 3 4 5 6 7 ...

Page 10: ... modem additional analogue devices 2 System terminal device varix S 35 S 37 SD 38 or system terminal device varix S 35 6 7 Charges printer or local or remote Service PC 3 System terminal device varix S 37 SD 38 ISDN Telephone using DSS1 PC with ISDN interface ISDN Fax modem or similar device 4 n 4 if feed power supplied from PABX system n 8 with separate power supply ...

Page 11: ...us UPD Stimulus S0 DSS1 Stimulus a b n a b 1 n 1 2 3 4 5 6 7 Public telecommunications networks digital exchange connection analogue exchange connection Private telecommunications networks analogue exchange connection digital exchange connection Special interfaces Wireless interfaces Cable interfaces RS 232 varix 200 digital PABX system RS 232 ...

Page 12: ...tem terminal device varix S 35 S 37 SD 38 or system terminal device varix S 35 6 Connection of applications such as Voice Mail Charge accounting computers Hotel management system 3 System terminal device varix S 37 SD 38 ISDN Telephone using DSS1 PC with ISDN interface ISDN Fax modem or similar device 7 Local or remote Service PC 4 n 4 if feed power supplied from PABX system n 8 with separate powe...

Page 13: ...n with pulse DTMF dialling Interfacestoterminal devices Digital ISDN connection S0 point to multipoint DSS 1 Stimulus protocol DeTeWe UP0 point to point Stimulus protocol DeTeWe Analogue connection a b subscriber interface pulse DTMF dialling flash earth signalling Wireless interface DECT C TR 6 C TR 10 C TR 22 Interfaces to private networks ISDN connections S0 FV tie line QSIG S2M FV tie line QSI...

Page 14: ... x 0 6 St VI Bd Type of interface S0 S2M Point to point operation yes yes Range 600 m 10 m Number of wires 2 x 2 DA 2 x 2 DA Number of B channels 2 30 Type of interface S0FV S2MFV Point to point operation yes yes Point to multipoint operation yes no Range P P P M 1000 m 600 m 300 m Number of wires 2 x 2 DA 2 x 2 DA Number of B channels 2 30 Type of interface HKAS Range wire diameter 0 4 mm 1 8 km ...

Page 15: ...s Type of interface S0 UPD UP0 Bus operation yes no no Bus range 150 m Number of extensions on bus 8 Star range 1 km 1 km 2 km Number of wires 4 2 2 Number of interfaces per module 4 8 4 Interface structure 2 x B 1 x D 2 x B 1 x D 2 x B 1 x D Type of interface a b Ext Range dia 0 4 mm 4 km 2 x 265 Ohms Number of wires 1 DA ...

Page 16: ...mm Height mm Depth mm Pmax VA Central control module ZST 20 245 85 2 6 Peripheral control module PST 2 1 Line interface 2ab 2 RS232 ABV 40 5 5 Digital outside line interface S2M S2MAS 10 5 Analogue outside line interface HKAS 20 1 8 Analogue subscriber line interface ABTS 9 7 Digital subscriber outside line interface S0TAS 17 5 UP0 interface 4 UP0TS 10 7 Combined digital and analogue inter face SA...

Page 17: ... a T500mA F4002 fuse on the MBK Replace the fuse at location G48604 501 B001 51 or G48604 501 B002 51 System terminal device Width mm Height mm Depth mm Weight kg varix S 35 180 85 220 0 85 varix S 37 180 88 220 0 9 varix SD 38 194 85 220 0 93 varix M 2 62 157 30 approx 0 22 varix M 3 50 145 18 0 15 Version Configuration No of racks Idle state in W Full load in W1 Average2 in W h varix 14 3 14 por...

Page 18: ...s in accordance with IEC 721 3 3 Edition of April 1990 Power supply Each main module has its own power supply unit which provides the power for all hardware modules in the respective rack Mains input voltage 230 Vac 10 15 Mains frequency 50 60 Hz Protection class 1 in accordance with EN 60950 Cooling natural convection Operating protective earth protective earth contact of 230 V mains outlet Desig...

Page 19: ...d varix 200 D limit class B of EN 55022 VDE 8789 Part 3 as well as VDE 878 Part 3 Transmission technology Tests and measurements have been carried out on the individual interfaces in accordance with the following standards and the respective requirements are met by the hardware Analogue outside trunk line interface module HKAS analogue user subscriber line inter face module ABTS and a b subscriber...

Page 20: ... UP0 layer 1 version 5 92 Requirements for layer 1 of the UP0 interface version 8 89 Digital S2M outside line interface BAPT 224 ZV 2 version of March 1993 I ETS 300 011 version of December 1993 Interfaces Non DDI trunk interface HKZ Depending on the HKAS version used Standard in accordance with FTZ 12TR21 ZR Loop current 17 60 mA DC resistance closed loop state at 35 mA 50 Ohms open loop state 30...

Page 21: ...frequency in accordance with FTZ 12 R 1 12 Flash time 100 ms 5 ms Characteristics of S2M interface Number of wires four two per direction Net bit rate 1920 kbit s Bit clock rate 2048 kbit s Frame period 125 µs Frame length 256 bit Termination resistance 120 Ohms Transmission code HDB3 Characteristics of S0 interface Number of wires two Net bit rate 144 kbit s Bit clock rate 192 kbit s Frame period...

Page 22: ... voltage 38 V Ring voltage 60 V Ring frequency 50 Hz Ring current per subscriber 20 mA Earth key current 20 mA Digital S0 subscriber line interface Number of wires four two per direction Net bit rate 144 kbit s Bit clock rate 192 kbit s Frame period 250 µs Frame length 48 bit Termination resistance 100 Ohms Transmission code AMI Feed phantom feed circuit Maximum DC power per interface port in acco...

Page 23: ...d specifications Switching voltage 100V Switching current 2 A Switching load 50 W The relay contact is protected by a spark suppression circuit DECT in general Carrier frequencies 10 carrier frequencies starting with 1881 792 MHz and at intervals of 1 728 MHz are used highest frequency 1897 344 MHz Time slots Each of the 10 carrier frequencies has 24 time slots 12 in trans mission direction and 12...

Page 24: ...s Operating time of Portable Part with fully charged battery pack Idle standby mode approx 70 h Continuous call use approx 10 h Time required to charge fully discharged battery pack approx 2 5 h Dimensions L x W x H 157 x 62 x 30 mm Weight approx 220 g Casing material ABS plastic Portable Part varix M3 Standards protocols DECT GAP CAP Wireless interface proprietary protocol when using DeTeWe syste...

Page 25: ...onal time of the portable standby2 80 h parts with an NiMH battery permanent use 2 8 h charging time approx battery discharged in device 8 h separate 250 mA battery in charger 24 h Weight varix M3 150 g incl battery pack Dimensions varix M3 approx 145 x 50 x 18 mm incl battery pack Operating voltage charger 230 V 50 Hz 3 1 at 10 C LCD functions and full battery capacity are not guaranteed 2 respec...

Page 26: ...rt to PABX Physical interface 2 x UP0 or 2 x UPD 64 kbit s via 4 B channels ADPCM in fixed part Logical interface proprietary Stimulus protocol via one of the two D channels Synchronisation on other D channel within 2 µs Feed concept feed power via both UP0 UPD interfaces Power consumption approx 2 W Maximum cable length to PABX 2 km UP0 1 km UPD for wire diameter 0 6 mm Antenna connection 2 optio...

Page 27: ...103 x 30 mm Weight approx 145 g Casing material ABS plastic DECT Fixed Part indoor outdoor external antennae Circular pattern Directional pattern Gain dBi 2 2 7 Polarisation vertical vertical 3 dB beamwidth horizontal deg 360 85 length cm 19 Dimension cm 10 1 x 9 5 x 3 2 Weight g 50 100 Use indoor outdoor indoor outdoor indoor outdoor connector TNC TNC Windload 200 km h N 24 24 ...

Page 28: ... 6 dB loss means that the range is halved Type of cable Attenuation dB m Length 6dB m Diameter mm RG 217 U 0 43 14 13 8 RG 9 B U 0 62 9 7 10 3 RG 213 U 0 62 9 7 10 5 RG 214 U 0 62 9 7 10 5 RG 223 U 1 18 5 1 5 4 RG 58 C U 1 34 4 5 5 RG 188 A U 1 9 3 2 2 7 RG 174 U 2 11 2 8 2 5 RG 178 B U 2 56 2 3 1 8 ...

Page 29: ...imulus protocol via one of the two D channels Synchronisation on other D channel within 2 µs Feed concept feed power via both UP0 UPD interfaces external power supply required for cable lengths above 1 5 km Power consumption approx 2 W Maximum cable length to PABX 2 km UP0 or 1 km UPD for wire diameter 0 6 mm Antenna connection 2 optional external antennae Software download of software from PABX t...

Page 30: ...er supply rechargeable battery pack 3 6 V 400 mAh Mounting position The charger holder is a table top device with plastic feet Description of battery charger holder The battery charger allows recharging of the portable part s battery Facilities fast charging of the batteries protection against undercharging protection against overcharging Operating elements Holder for portable part An LED indicate...

Page 31: ...ge Temperature range 10 C to 50 C Power supply rechargeable battery pack 3 x 1 2 V micro NiMH Mounting position The charger holder is a table top device with plastic feet Description of battery charger The battery charger allows recharging of the portable part s battery Facilities fast charge protection against undercharging overcharging Operating elements holder for portable part Operating manual...

Page 32: ...lassified according to DIN IEC 721 3 4 are taken into consideration Climatic and environmental conditions 4K2 Ambient temperature 25 55 C Relative humidity 15 100 Absolute humidity 0 26 25 g m3 Condensation possible Precipitation possible Temperature for rain lower limit 5 C 4Z8 Water other than rain direct water spray Ice possible 4B2 Biological environmental conditions 4C3 Chemically active agen...

Page 33: ... is not necessary to match the cable connections to the antennae the overvoltage protection in the casing must be wired to earth Feed power to the base station is fed via the PABX cable External antenna When external antennae are used for the fixed part the antenna field pattern can be selec ted to suit the location For a radial circular pattern a circular pattern antenna dipole is used to achieve...

Page 34: ...ption Connecting an external antenna to the base station either a circular pattern whip antenna or a directional antenna Attenuation links are not used Circular pattern antenna or Directional antenna Mounting bracket Indoor or Outdoor Fixed Part Cable ...

Page 35: ...freely configurable 1 4 digits X DECT server operation DECT PABX X wire PABX X Workplace solutions in line or series system X dialling system with team X broker call shuttling system X ante chamber secretarial system X Network connections S0 basic access connection X S2M primary rate multiple access connection X HKZ analogue non DDI X Protocols DeTeWe protocol X DSS1 X FV QSIG X ...

Page 36: ...CT GSM via FP X Other interfaces RS 232 printer X RS 232 Server interface X RS 232 PC interface modem X LCR X Relay contacts X Service Remote maintenance Teleservice X Log recording X Analogue dedicated lines and extension lines to master or satellite PABX X Private special equipment X Direct trunk line to workplace X Fault circuit extension connection on system breakdown only for HKZ ...

Page 37: ... to switchboard telephones X X X Waiting held call queue X X Identification of calls in queue memory X X PC switchboard management Line busy indicator panel additional hardware 1 Internal telephone directory additional hardware 1 RS 232 terminal mode X TAPI TAR GO TEL X Transfer when called party is busy with redialling X X X Incoming dialled traffic Call signalling ring X X X Individual call answ...

Page 38: ...led traffic Individual dialled outward calls X X X Automatic trunk line allocation X X X Directed trunk line seizure X X X Route segregation for dialling lines dedicated lines special equipment X X X X X X X X X Least cost routing X X X Traffic via dedicated lines X X X Call shuttle Hold for enquiry from extensions X X X Shuttle internal external X X X Hold status X X X ...

Page 39: ...ll holding circuit in external traffic with call waiting indication X X X Call forwarding in external traffic Call forwarding trunk line to trunk line X X X Call diversion of internal connections by Forward unconditional before second party answers X X X Special call forwarding mode single hand transfer X X X Call transfer conditional after second party answers X X X Call pick up X X X Call repeti...

Page 40: ...ress system announcements X X X Divert extension call via trunk exchange X X Individual intercom circuit X X Team intercom circuit X X Call forwarding if called party does not answer X X X Special measures for making calls Central automatic dialling generator X X X Dialling generator for speed dialling with individual destinations X X X Dialling repetition for external destinations X E X Extended ...

Page 41: ...ting indication X X X Automatic call waiting indication X X X Call variants Incoming line allocation X X X Night service circuits X X X Assignment of night service extension X X Call diversion forwarding Call diversion X X X Call diversion external X X Automatic call diversion after specified time X X X Unconditional call diversion e g Voice Mail X X X Call pick up X X X Follow me X X X Directed c...

Page 42: ...nal device X X Call data processing GEDAS only with additional hardware Booking code project identification X X X Capturing of incoming call data GEDAS only with additional hardware Capturing of charges data GDE only with additional hardware 1 Call duration recording and display X X Information interchange Display and modification of system settings X X Busy line display X X Appointment call alarm...

Page 43: ...only local area metropolitan only domestic calls only national restricted international calls only unrestricted trunk access X X X Barring of specific connections Central class of service permission modification X X Class of service permission modification for extension with code number password X X X Barring of unwanted connections specific connection barring X X X Multi company operation X X X P...

Page 44: ... no connections to another PP 7 This counter is incremented when a hand over is being made to the FP and there is already a con nection to another PP 8 This counter is incremented when a hand over is being made to the FP and there is already a con nection to two other PPs 9 This counter is incremented when a hand over is being made to the FP and there is already a con nection to three or more othe...

Page 45: ...he PABX Every time the counter is incremented an error message is transmitted to the PABX If an active FP no longer receives any synchronization signal this counter is incremented 5 times before the FP deactivates itself If an FP cannot synchronize itself while it is being started up the counter is incremented every 10 seconds for an undefined period until either a synchronization signal which can...

Page 46: ...1 40 Description varix 200 varix 14 DECT 1 Description ...

Page 47: ...nning and preparation steps are already required at the stage of drawing up a tender For each of these steps a pre defined set of information must be compiled for the purpose of maintaining complete system documentation When a job order is to be carried out continue with the following steps Installation Putting the system into operation Verification and approval These steps are summarised in the f...

Page 48: ...s communications network 2 2 Flowchart Preparation Plan Installation Putting the system into operation Verification Approval End Approval document Documentation Documentation Job list System proposal Installation diagramm Plan of building Check list Tender Start ...

Page 49: ...e perimeter of each part of a building Fire walls and other strongly built walls absorb high frequency energy so strongly that the field illumination must recommence on the other side of the respective wall In the plan indicate areas of uniform construction Often larger buildings are constructed in sections phases Different materials and room spacing can often have an effect on the radio signal pr...

Page 50: ... be subjected to RF fields Length and breadth of the area Are there many bushes trees within this part area What were the weather conditions during the site inspection This question really only makes sense for an outdoor area Screening as a result of tree foliage varies according to sea son Waterlogged trees also cause higher signal attenuation A particular range measured in dry weather will decre...

Page 51: ...all floors have similar characteristics as far as furnish ings and telephone traffic are concerned planning for the indi vidual floors can be reduced to a minimum The same number of FPs can be installed on each floor If the floors differ from each other then individual measurement and planning should be undertaken for each floor Important as FP installation is based on radio field footprints and a...

Page 52: ...nstallation and for final installation or even for a phase beyond This ensures that cabling able to support future expan sion of the network can already be installed during the initial installation If the customer is unable to provide the necessary details then default values should be assumed refer to ETSI table in the appendix Initial installation Final installation What is the rate of telephone...

Page 53: ...rved that when carrying out propagation time measurements cable connections may represent impedance discontinuities which can reflect a measuring pulse This has the effect of causing incorrect propagation time measurements As cable connections cannot be eliminated the results of propaga tion time measurements should be subjected to critical evalua tion i e has a short cable value been obtained for...

Page 54: ... signals but also have an adverse effect on propagation condi tions in the immediate vicinity due to the high level of reflection they cause Factory areas with large amounts of sheet metal on the walls floors and many sheet metal cabinets have the same effect This will necessitate individual measurements being car ried out for each location Are there any devices on site or in the immediate vicinit...

Page 55: ... new system The affected areas should be indicated in the footprint plans as the level of tele phone traffic here cannot be assessed How large is the cell radius measured in the middle of the area If the area under inspection is relatively homogeneous then one measurement will suffice Transmission quality will deterio rate for attenuation up to 58 dBm corresponds to display val ues between 7 and 8...

Page 56: ...g these theoretically obtained values Make any necessary corrections Within buildings FPs should be installed centrally Avoid installing near or on external walls Install FPs in a single row if possible In the case of broad areas install the FPs in several rows Install the FPs in the rows in such a way that their footprints overlap The above diagram is an idealised representation of radio cells HF...

Page 57: ... The average horizontal range of a DECT hop inside an office building is between 10 and 30 metres radius Inside large enclosures e g exhibition halls and factories the limit is 100 to 200 metres Out in the open the size of a cell can increase to between 300 and 500 metres These figures can vary greatly depending on the materials used in a building walls and ceilings made of reinforced concrete woo...

Page 58: ...lues for building materials at 1 9 GHz values are rounded Table 2 1 Using the information on building materials and the attenuation values for open spaces see Table 2 in the glossary it is possible by simple mathematics to estimate the size of the radio cell in advance However careful measuring and planning remain essential 2 4 3 System proposal Once the number of FPs has been determined it is pos...

Page 59: ...s to the FPs are if UPDTS interfaces are used 1000m if UP0TS are used 1500m for wires of 0 6 mm diameter If cables between 1500 and 2000 metres are used with UP0TS then the FP should be powered by a mains adapter power supply 2 5 2 Putting the FPs into operation Install the FPs physically connect the power supplies but do not connect them to the PABX The telephone cables should be terminated using...

Page 60: ...n such a way as to cancel each other by interference Cancellation is caused by beams with different propagation times being reflected from objects 2 5 3 Installation of FPs The following observations apply to rooms with a normal ceiling 2 80 m In rooms with a ceiling height of 3 metres or more the ideal height at which to mount an FP increases accordingly Ensure a minimum clearance of 50 cm to the...

Page 61: ...FPs refer to Figure 2 4 When installing several FPs on the same wall it is advisable to mount them above each other or in a row providing the minimum spacing requirements are adhered to Horizontal spacing Vertical spacing approx 250 cm approx 25 cm FP FP FP 250 cm 25 cm Fig 2 4 Horizontal spacing approx 250 cm Vertical spacing approx 25 cm ...

Page 62: ...ustomer will not want to use the phone outside of the build ing Therefore in the majority of cases where outdoor communications are not required this type of installation should be avoided It makes more sense to take into account the fact mentioned initially in connection with the functional characteristics of DECT telephone networks namely that the bit error rate contrib utes significantly to the...

Page 63: ...nstalled on outside walls as a part of the radio field will not be outside of the usable area Exceptions a customer requests coverage outside of a building e g to include a parking lot in which case installing FPs on an outside wall makes sense Antenna footprint idealized FP FP FP FP FP with omnidirectional antenna Fig 2 6 FP arrangement for high traffic levels Good installation Antenna footprints...

Page 64: ...ation plane rotations described in the preceding chapters are off set using the so called diversity method This method is based on selecting the antenna which has the best reception at the receiving end FP Initial scientific research has shown that spacing directional antennae horizontally space diversity achieves better results than vertical spacing Note When using directional antennae both must ...

Page 65: ...nae As described in the previous chapter both antennae must point in the same direction when using directional antennae The following side on views of a building serve to illustrate this Fig 2 8 Fig 2 9 Directional antennae FP Building Incorrect installation FP Directional antennae Building Correct installation ...

Page 66: ...re mounted horizontally on the same plane refer to chapter 2 5 5 or Figure 2 10 and Figure 2 11 The distance between directional antennae should not be equal to the wavelength or a whole multiple of the wavelength 32 48 64 cm Ensure that the minimum spacing between the antennae is 20 cm Wall with directional antennae FP Directional antennae to observer Wall Fig 2 10 Incorrect installation Directio...

Page 67: ...ut FP locations and cable routes must be documented Photographs must be made of the FP locations The pictures should show that there is nothing obstructing the beam of the FPs and that the walls are not damaged Directional antennae Wall TNC socket Fig 2 12 Incorrect installation Directional antennae mounted horizontally Directional antennae Wall TNC socket Fig 2 13 Correct installation Directional...

Page 68: ...e SPC displays values as cable lengths If at any point the correct connection of twisted pairs was not observed then this can cause false reflections of the measuring pulse This will result in the wrong i e too short cable length being stored into the PABX system Wrong cables or incorrect signal propagation times can cause high bit error rates on the cable An increase in bit error rates leads to c...

Page 69: ...ssfully put into operation measure and document the quality of the telephone network enter values into the plan of the building It may be necessary to install further FPs To check the radio field strengths use an M2 PP in measuring mode Instructions on how to use the M2 measuring PP are contained in Chapter 2 11 Measure ment Procedure ...

Page 70: ...then be obtained To this end the latter should be given a set of planning documents An approval document is compiled and signed by both parties A suggestion for such a document is enclosed Appendix 1 Chapter 2 10 The locations of the base stations and the measuring points at the time of the site inspection should be entered into the plans and numbered ...

Page 71: ...ransmission path Fig 2 14 Equation 1 For a useable voice connection a BER of 1 10 3 is required The delay spread see chapter 2 9 3 and the BER are related the bit error rate is proportional to the square of the delay spread and inversely proportional to the bit period The BER thus enables us to deduce infor mation on the delay spread which in turn is directly related to the phenomenon of multiple ...

Page 72: ... fig 2 16 shows the principle based on the plan view of an office floor The overall signal received is the sum of the direct signal and all the different delayed and correspondingly attenuated echoes of the signal received due to the multiple propagation paths The superimposition of these signal echoes leads to inter symbol interference ISI or bit interference This means that the signal which reac...

Page 73: ...B For example At a particular customer s location the field will have to penetrate a concrete wall Apart from this the remaining field conditions can be assumed to be ideal Maximum dynamic range 85 dB Concrete wall 20 dB cf table 2 1 Remaining dynamic range 65 dB cf table 2 2 Taking into consideration that the signal loss over a distance of 25 m is already 66 dBm we can deduce that the FPs must be...

Page 74: ...ies to horizontal field propagation however The vertical range may be lower The diagrams of a directional antenna shown below as an example show that the directional antenna used in DeTeWe systems have nearly the same field char acteristics in vertical and in horizontal directions figures 2 17a and 2 17b Fig 2 17 a Fig 2 17 b ...

Page 75: ...on the respective site the actual range may differ greatly from the theo retical value and can only be determined precisely by carrying out on site measurements 2 9 5 Polarisation and down tilt Polarisation Polarisation in the description of the propagation of an electromagnetic field is the term used to describe the direction of the electrical field vector The magnetic field vector is always orth...

Page 76: ...ame polarisation It is important to understand that only an antenna which is aligned to the polarity of the wavefront at the antenna location will achieve maximum reception signal power Rule to remember The reception and transmission antennae must always have the same polarisation and must be aligned to one another Down tilt The electrical down tilt is a measurement that describes the angle by whi...

Page 77: ...enna downwards to supplement the down tilt obtained purely by the electrical characteristics see figure 2 20 Note If you are using directional antennae then these should be tilted downwards angle between 0 and 30 from the horizontal in order to achieve a better field coverage at the PPs operating height Fig 2 20 The directional antennae and installation material to be used are shown in the data on...

Page 78: ...2 32 Description varix 200 varix 14 DECT 2 Planning a cordless communications network Fig 2 21 Grafik 1 ...

Page 79: ...Description varix 200 varix 14 DECT 2 33 2 Planning a cordless communications network Fig 2 22 Grafik 2 ...

Page 80: ...o hold a connection to FP B on slot 2 This strict synchronisation is also essential for hand over to work correctly a PP switches an ongoing connection to a different FP ETSI specifies a maximum time jitter of 2 µs The DeTeWe FPs receive a regular synchronization clock impulse from the central PABX sys tem via the UP0 interface They keep pace autonomously between these impulses However since the p...

Page 81: ...ode TDD Time Division Duplex 12 time slots each Number of duplex channels 120 Modulation mode GMSK with a modulation index of 0 5 Frequency swing 288 kHz nominal Transmitter power PP FP 10 mW max 250 mW Overall data trans rate 1152 kbit s Bit period 0 868 µs Carrier frequency offset 1 728 MHz TDMA frame period 24 slots 10 ms Time slot length 417µs 52µs of this buffer period Data per slot voice tra...

Page 82: ...List of abbreviations used BER Bit Error Rate DECT Digital Enhanced Cordless Telecommunications E Erlang Erl Erlang ETSI European Telecommunications Standardisation Institute FP Fixed Part base station ISI Inter symbol interference PP Portable Part cordless telephone r Radius Subscr Subscriber ...

Page 83: ...0 000 25 m2 subscr typically 10 000 Large company in office areas 150 200 areas 22 26 m2 FP at 5 Erl 20 m2 subscr 25 of all sub scribers use DECT 2 000 7 500 10 000 E km2 storey Large company in office areas Companies having their own buildings parking lots and garden areas 700 140 E km2 storey Small and medium sized company Companies with 20 employees one FP is sufficient for a company 100 compan...

Page 84: ..._____________________________________________________________ DeTeWe installation company _______________________________________________ Person to contact___________________________________________________________ Telephone number__________________________________________________________ Date _______________________Company signature ____________________________ Comments __________________________...

Page 85: ...n must be numbered Then enter the respective measured values into the building floor plans Available floor plans file these with the system documents In cases where low field strengths are tolerated as a compromise solution the following table should be filled out and agreed upon with the customer Plan no Plan designation ...

Page 86: ...k Restrictions Further comments e g concerning telephone traffic density _______________________________________________________________ _______________________________________________________________ Room Field strength critical 70 to 85 dBm No signal available less than 85 dB Reason ...

Page 87: ...nnecting it to the PABX system Monitor Mode varix M2 To measure the field strength switch on the portable part in MONITOR MODE measure ment mode as described in the varix M2 operating manual Local settings menu item MONITOR MODE code 2530 If you are able to log in successfully the display will give the following read out after a few seconds for example very good connection or satisfactory connecti...

Page 88: ...ch off the portable part When you switch this on again it is switched back to normal operating mode Please observe in order to verify the footprint you should carry out the tone test mentioned above a positive result for the test together with a field strength of at least 7 bar display signifies a good field strength symbol indicates that the portable part is within reach of a base station symbol ...

Page 89: ... Scroll up or down using the appropriate arrow and select by pressing OK Displays Description Version Number Auto Call Test Auto Answer Test Version Number Auto Call Test Auto Answer Test SW 007 002 No max 8 Digits HW Ton 5 to 255 sec Ton 5 to 255 sec EE 011 000 Toff 5 to 255 sec Toff 5 to 255 sec Software version repeated calls to this ext no repeated answer when call is signalled Hardware versio...

Page 90: ...user can change the PIN for the PP To do this enter the valid PIN then enter the new PIN twice and confirm by pressing OK The PIN is 4 digits long Reset This function partially sets the PP back to default values This means that all defaults are set and all charges information values are zeroed out The call address list the memory for repeat dialling and the news text memory are all deleted After t...

Page 91: ...m the menu View Last failed Enrolments List select the window List of unsuccessful enrol led PP 2 Find out by date and time whether the required PP is contained in the list Make a note of the ID number and exit the program 3 Now start up Comfort SPC and enter the required data in the dialogue boxes in the menu Extras DECT Central DECT data or in Extras DECT Portable Parts 4 Exit the program after ...

Page 92: ...ollowing table shows a matrix for 120 channels of these the channel and time slot allo cations for a maximum of 30 active PPs are configured by the DECT system The varix 200 14 uses a blind slot technique in which only certain slots e g slot 0 2 4 etc out of 12 can be used in other words the neighbouring slots left free At very close radio ranges the radiated transmitter power of the respective ch...

Page 93: ...minals Note This connection mode is identical to an S0 extension point to point connection except that here you must not install any terminating resistors 1 2 Sync Data a1 b1 a2 b2 5 6 7 8 1 2 3 4 a1 b1 a2 b2 I Y St Y 2x2x0 6 or I 2Y St Y 2x2x0 6 St III Bd UP0TS S only two of four possible interfaces shown one connector block If a balanced connecting cable twisted pair star quad is used the length...

Page 94: ...3 2 Description varix 200 varix 14 DECT 3 Base station cabling ...

Page 95: ...e station is unplug ged and re plugged The automatic propagation time measurement function must be activated individually for each FP via the comfort SPC menu Hardware nachträglich Subseq hardware configura tion FP Eigenschaften FP characteristics After the automatic measurement mode has been activated it is no longer possible to read out or alter the cable length data Note that this may lead to p...

Page 96: ...rt circuit plug from the measuring kit into the FP end of the cable i e the UAE outlet so that you can measure the loop resistance at the PABX end at the connector block cf page 4 3 Step 3 It is important to also mark the cable to identify the corresponding interface e g Rack Slot Interface address so as to avoid re connecting it to the wrong interface terminal block by mistake UP0 UPD PST ZST Mea...

Page 97: ...les by a UPDTS module you should to be on the safe side repeat the propagation time measurement this ensures that the measured values are correctly allocated to the interfaces by the software Step 3 Compare theoretical values to the measured values The following table shows theoretical values of loop resistances of specific cable lengths for a cable with 0 6 mm wire diameter From the loop resistan...

Page 98: ...nt by pressing the button if you have already carried out a previous measurement LED 2 may be in a different state If the measurement is concluded and the data have been transmitted to the PABX system suc cessfully both LEDs should show green Any other combination of displays indicates a meas urement failure cf table above LED 1 will start to blink again after approximately ten seconds indicates a...

Page 99: ...peripheral data Load the DECT customer data e g by using the Container Manager program You can use TOD F0E to show the first start up Erstanlauf note in the customer data a repeated Start up at this point would now delete all key and device settings stored in the PST s EEPROM Re load the DECT customer data data copy and reload the peripheral data data copy Re load the DECT customer data e g by usi...

Page 100: ...ny base stations each For the varix 200 system the PL is cur rently 29 and for the varix 14 it is 34 This means that the relationship is 1024 systems with up to 128 BS each AC Authentication Code central A secret code password under which the portable parts PPs log in If the subscriber does not specify an AC for a PP it will be ass igned the central authentication code by default However an indivi...

Page 101: ...ting determines how the TOD process will react to display error messages If expert mode is selected the data entered are checked and error messages are displayed If Komfortmodus Comfort mode is selected this check is not made as the comfort SPC already checks the data consistency Thus the Exp Mod setting should always be used here Important note Remember that after you have entered central system ...

Page 102: ...interfaces are occupied automatically i e 1 and 2 3 and 4 FPID Fixed Part Identity System specific identification number of the FP counted up from 0000 in hexadecimal mode FP Group Assignment to a group If the PABX in question is unstructured i e no definition of groups classes a group number 0 will always be entered Enrolm With without enrolment This enables the service engineer to specify indivi...

Page 103: ...ss Ia 01 and not on 03 IPEI International Portable Part Equipment Identity A world wide unique serial number for the respective PP Important It is not possible to use a portable part if the respective IPEI is not known AC Authentication Code A code which must be defined once when initially enrolling the PP If it is not specified here the default value 12345678 which is set up under TOD E1C will be...

Page 104: ...D 000 Because of this the above command must be used to dump the contents of this memory region To check the propagation times which were entered by the measuring base station Meß FP it may be necessary to read the respective values directly from the interface memories of the individual FPs TOD 125 Using the R S Ia to determine the SASP number interface memory number File 01 Code DECT Dat a Cust x...

Page 105: ...een carried out as yet so Byte 35 has the hexadecimal value FF After the measurement has been carried out byte 35 will change to a value between 00 and FE This value decoded to a decimal multiplied by 100 ns will give you the propagation time of the respective base station E g if byte 35 is 0F the decimal equivalent is 15 15 x 100 ns 1500 ns The cable length can then be calculated using the formul...

Page 106: ...gned to and configu red in groups and classes Further instructions are given in the varix 200 14 System Manual chapter 6 Important note After the system has been programmed the portable part must be logged enrolled into the base station fixed part once This will cause the identification codes IPEI AC UAK PARK and TPUI to be transmitted You must enrol the PP individually on each PABX system up to f...

Page 107: ...nnections The rules for configuring the 5 rack system are based on the following data 6 1 1 Number of base stations to be operated max 78 or 76 When using the ABVM or S2MM modules in slot 11 the number of base stations in the respective rack is reduced by 2 Note the pager application D ORIS requires that an ABVM module or no module at all be installed in slot 11 rack 1 Rack 1 1st rack main module ...

Page 108: ...ove radio range and footprint an extension of the number of PPs max 192 PP is not possible Note Please note that 192 PPs can already be achieved using four racks 4 x 2 PST 24 PPs respectively a fifth rack is used for improving the footprint characteristics B U S ON P S T U P D T S 1 1 U P D T S 2 1 2 1 S 2 M M P S T U P D T S 1 1 U P D T S 2 1 2 1 B U S OFF StPl 1 2 3 4 5 6 7 8 9 10 11 ...

Page 109: ...d up among the two S2M interfaces 30 14 It is practical to use three S2M interfaces only if further PABX systems e g for private network ing are employed if so then there may be limitations to traffic depending on the number of racks used 6 1 4 Use of S0TAS modules It is possible to use S0TAS modules for external S0 connections in accordance with general configuration guidelines per system max 192...

Page 110: ... on the number of racks used there may be limitations to telecommunications traffic The graph indicates the traffic value per extension mErl with a probability of loss failure equal to 0 1 in relation to the number of racks used mErl ext 300 250 200 150 100 50 0 100 150 200 extensions 3 racks 4 racks 5 racks ...

Page 111: ...will not exceed 3 metres It is not permitted to mix short ened cables 32 wire and standard cables 31 wire When installing DECT servers please note With a view to future use of a 5 rack system for example it is recommended to use the hori zontal mounting arrangement with short bus cables 32 wire when originally installing 3 rack systems The spaces required for the future installation should at this...

Page 112: ...6 6 Description varix 200 varix 14 DECT 6 varix 200 5 rack system DECT server ...

Page 113: ...European Telecommunications Standards Institute FP Fixed part also called base station in this document IPEI International portable equipment identity an identification number unique in the whole world assigned to a portable part LAL Location Area Level PABX Private automatic branch exchange PABXID PABX identification serial number of the PABX system PARK Portable access rights key access rights k...

Page 114: ...PUI Temporary portable user identity an identification number for a portable part unique within the respective PABX UAK User authentication key a key code for users It is generated during the enrolment proce dure after which it is used instead of the AC ...

Page 115: ...on e g an on going call to a particular terminal device is handed over from one physical channel to another Internal Handover within a specific closed wireless telecommunications network This may be either an inter cell handover or an intra cell handover Inter cell one cell to another Handover from one radio cell i e base station to another Intra cell within a cell Handover within one and the same...

Page 116: ... to control individual portable parts access to specific base stations A group can comprise one or several up to 128 base stations These groups in turn are assigned to classes Each class may contain up to four groups Unstructured system An unstructured system may be considered to constitute a special implementation of a struc tured system in which all base stations belong to a single group and thi...

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